location adjustment

Billing.Shared/App.cs

@@ -1,9 +1,11 @@
 using System.Collections.Generic;
+using System.IO;
 using System.Threading.Tasks;
 using Billing.Languages;
 using Billing.Models;
 using Billing.Store;
 using Billing.Themes;
+using Billing.UI;
 using Xamarin.Essentials;
 using Xamarin.Forms;
 
@@ -11,41 +13,55 @@ namespace Billing
 {
     public class App : Application
     {
+        internal const string NewBillAction = "/newbill";
+
         public static AppTheme CurrentTheme { get; private set; }
         public static PlatformCulture CurrentCulture { get; private set; }
         public static List<Bill> Bills => bills ??= new List<Bill>();
         public static List<Account> Accounts => accounts ??= new List<Account>();
         public static List<Category> Categories => categories ??= new List<Category>();
+        public static bool SaveLocation => saveLocation;
+        public static string MainRoute => mainRoute;
 
         private static List<Bill> bills;
         private static List<Account> accounts;
         private static List<Category> categories;
+        private static bool saveLocation;
+        private static string mainRoute;
 
-        public App()
+        private string initialUrl;
+
+        public App(string url = null)
         {
+            if (url == NewBillAction)
+            {
+#if __ANDROID__
+                mainRoute = "//Bills/Details";
+#endif
+            }
+            else
+            {
+                mainRoute = "//Bills";
+                initialUrl = url;
+            }
             CurrentCulture = new PlatformCulture();
+            saveLocation = Preferences.Get(Definition.SaveLocationKey, false);
             InitResources();
 
             MainPage = new MainShell();
-            Shell.Current.GoToAsync("//Settings");
         }
 
-        public static void WriteAccounts() => StoreHelper.WriteAccounts(accounts);
-
-        public static void WriteBills() => StoreHelper.WriteBills(bills);
-
-        public static void WriteCategories() => StoreHelper.WriteCategories(categories);
-
         protected override void OnStart()
         {
             Helper.Debug($"personal folder: {StoreHelper.PersonalFolder}");
             Helper.Debug($"cache folder: {StoreHelper.CacheFolder}");
-
-            accounts = StoreHelper.GetAccounts();
-            categories = StoreHelper.GetCategories();
-            bills = StoreHelper.GetBills();
 
-            Shell.Current.GoToAsync("//Bills");
+            if (initialUrl != null)
+            {
+                var url = initialUrl;
+                initialUrl = null;
+                _ = OpenUrl(url);
+            }
         }
 
         protected override void OnResume()
@@ -83,5 +99,56 @@ namespace Billing
             // TODO: status bar
             Resources = instance;
         }
+
+        public static void SetSaveLocation(bool flag)
+        {
+            saveLocation = flag;
+        }
+
+        public static async Task InitializeData()
+        {
+            var instance = await StoreHelper.Instance;
+            await Task.WhenAll(
+                Task.Run(async () => accounts = await instance.GetListAsync<Account>()),
+                Task.Run(async () => categories = await instance.GetListAsync<Category>()),
+                Task.Run(async () => bills = await instance.GetListAsync<Bill>()));
+        }
+
+#if __ANDROID__
+        public static async Task<bool> OpenUrl(string url)
+#elif __IOS__
+        public static bool OpenUrl(string url)
+#endif
+        {
+            if (string.IsNullOrEmpty(url))
+            {
+                return false;
+            }
+            if (File.Exists(url))
+            {
+#if __ANDROID__
+                var status = await Helper.CheckAndRequestPermissionAsync<Permissions.StorageRead>();
+                if (status != PermissionStatus.Granted)
+                {
+                    return false;
+                }
+#endif
+                _ = Task.Run(async () =>
+                {
+                    var result = await StoreHelper.ReloadDatabase(url);
+                    if (result)
+                    {
+                        await InitializeData();
+
+                        var current = Shell.Current.CurrentPage;
+                        if (current is BillingPage page)
+                        {
+                            MainThread.BeginInvokeOnMainThread(() => page.TriggerRefresh());
+                        }
+                    }
+                });
+            }
+            return true;
+        }
     }
 }

Billing.Shared/Billing.Shared.projitems

@@ -11,6 +11,10 @@
   <ItemGroup>
     <EmbeddedResource Include="$(MSBuildThisFileDirectory)Languages\en.xml" />
     <EmbeddedResource Include="$(MSBuildThisFileDirectory)Languages\zh-CN.xml" />
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)SplashPage.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
   </ItemGroup>
   <ItemGroup>
     <Compile Include="$(MSBuildThisFileDirectory)App.cs" />
@@ -18,10 +22,11 @@
     <Compile Include="$(MSBuildThisFileDirectory)Helper.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Languages\PlatformCulture.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Languages\Resource.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)LocationExtension.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)MainShell.xaml.cs">
       <DependentUpon>MainShell.xaml</DependentUpon>
+      <SubType>Code</SubType>
     </Compile>
-    <Compile Include="$(MSBuildThisFileDirectory)Models\BaseModel.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Models\Category.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Models\Account.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Themes\BaseTheme.cs" />
@@ -29,6 +34,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Themes\Light.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)UI\BillingDate.xaml.cs">
       <DependentUpon>BillingDate.xaml</DependentUpon>
+      <SubType>Code</SubType>
     </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)UI\BillingPage.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)UI\ColorPicker.cs" />
@@ -41,12 +47,15 @@
     <Compile Include="$(MSBuildThisFileDirectory)UI\WrapLayout.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Views\AccountPage.xaml.cs">
       <DependentUpon>AccountPage.xaml</DependentUpon>
+      <SubType>Code</SubType>
     </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)Views\AddAccountPage.xaml.cs">
       <DependentUpon>AddAccountPage.xaml</DependentUpon>
+      <SubType>Code</SubType>
     </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)Views\AddBillPage.xaml.cs">
       <DependentUpon>AddBillPage.xaml</DependentUpon>
+      <SubType>Code</SubType>
     </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)Views\AddCategoryPage.xaml.cs">
       <DependentUpon>AddCategoryPage.xaml</DependentUpon>
@@ -54,6 +63,7 @@
     </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)Views\BillPage.xaml.cs">
       <DependentUpon>BillPage.xaml</DependentUpon>
+      <SubType>Code</SubType>
     </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)Views\CategoryPage.xaml.cs">
       <DependentUpon>CategoryPage.xaml</DependentUpon>
@@ -73,11 +83,19 @@
     </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)Views\SettingPage.xaml.cs">
       <DependentUpon>SettingPage.xaml</DependentUpon>
+      <SubType>Code</SubType>
     </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)UI\OptionsCells.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Store\StoreHelper.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Models\Bill.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)UI\SegmentedControl.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Models\IIdItem.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)SplashPage.xaml.cs">
+      <DependentUpon>SplashPage.xaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)Models\Logs.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Views\ViewLocationPage.cs" />
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="$(MSBuildThisFileDirectory)MainShell.xaml">
@@ -111,6 +129,7 @@
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="$(MSBuildThisFileDirectory)Views\IconSelectPage.xaml">
+      <SubType>Designer</SubType>
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
   </ItemGroup>
@@ -119,21 +138,25 @@
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="$(MSBuildThisFileDirectory)Views\CategoryPage.xaml">
+      <SubType>Designer</SubType>
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="$(MSBuildThisFileDirectory)Views\AddCategoryPage.xaml">
+      <SubType>Designer</SubType>
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="$(MSBuildThisFileDirectory)Views\CategorySelectPage.xaml">
+      <SubType>Designer</SubType>
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="$(MSBuildThisFileDirectory)Views\RankPage.xaml">
+      <SubType>Designer</SubType>
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
   </ItemGroup>

Billing.Shared/Helper.cs

@@ -1,8 +1,11 @@
 using Billing.Models;
+using Billing.UI;
 using Billing.Views;
 using System;
 using System.Globalization;
 using System.Linq;
+using System.Runtime.CompilerServices;
+using System.Threading.Tasks;
 using Xamarin.Essentials;
 using Xamarin.Forms;
 
@@ -16,33 +19,35 @@ namespace Billing
             var time = DateTime.Now.ToString("HH:mm:ss.fff");
             System.Diagnostics.Debug.WriteLine($"[{time}] - {message}");
         }
-
-        public static void Error(string category, Exception ex)
-        {
-            Error(category, ex?.Message ?? "unknown error");
-        }
-
-        public static void Error(string category, string message)
-        {
-            var time = DateTime.Now.ToString("HH:mm:ss.fff");
-            System.Diagnostics.Debug.Fail($"[{time}] - {category}", message);
-        }
 #else
 #pragma warning disable IDE0060 // Remove unused parameter
         public static void Debug(string message)
         {
         }
+#pragma warning restore IDE0060 // Remove unused parameter
+#endif
 
         public static void Error(string category, Exception ex)
         {
+            Error(category, ex?.ToString() ?? "unknown error");
         }
 
         public static void Error(string category, string message)
         {
-        }
+#if DEBUG
-#pragma warning restore IDE0060 // Remove unused parameter
+            var time = DateTime.Now.ToString("HH:mm:ss.fff");
+            System.Diagnostics.Debug.WriteLine($"[{time}] - {category}", message);
+            MainThread.BeginInvokeOnMainThread(async () => await Shell.Current.DisplayAlert(category, message, "Ok"));
 #endif
 
+            _ = Store.StoreHelper.SaveLogItemAsync(new Logs()
+            {
+                LogTime = DateTime.Now,
+                Category = category,
+                Detail = message
+            });
+        }
+
         public static bool NetworkAvailable
         {
             get
@@ -80,9 +85,11 @@ namespace Billing
 
         public static UIBill WrapBill(Bill b)
         {
+            var category = App.Categories.FirstOrDefault(c => c.Id == b.CategoryId);
             return new UIBill(b)
             {
-                Icon = App.Categories.FirstOrDefault(c => c.Id == b.CategoryId)?.Icon ?? BaseModel.ICON_DEFAULT,
+                Icon = category?.Icon ?? Definition.DefaultIcon,
+                TintColor = category?.TintColor ?? Definition.TransparentColor,
                 Name = b.Name,
                 DateCreation = b.CreateTime,
                 Amount = b.Amount,
@@ -129,5 +136,26 @@ namespace Billing
         }
 
         public delegate void PropertyValueChanged<TResult, TOwner>(TOwner obj, TResult old, TResult @new);
+
+        public static async Task<PermissionStatus> CheckAndRequestPermissionAsync<T>() where T : Permissions.BasePermission, new()
+        {
+            var status = await Permissions.CheckStatusAsync<T>();
+            if (status != PermissionStatus.Disabled &&
+                status != PermissionStatus.Granted)
+            {
+                status = await Permissions.RequestAsync<T>();
+            }
+            return status;
+        }
+    }
+
+    public class AsyncLazy<T> : Lazy<Task<T>>
+    {
+        public AsyncLazy(Func<Task<T>> factory) : base(() => Task.Run(factory)) { }
+
+        public TaskAwaiter<T> GetAwaiter()
+        {
+            return Value.GetAwaiter();
+        }
     }
 }

Billing.Shared/Languages/Resource.cs

@@ -10,12 +10,22 @@ namespace Billing.Languages
     internal class Resource
     {
         public static string Ok => Text(nameof(Ok));
+        public static string Cancel => Text(nameof(Cancel));
         public static string Yes => Text(nameof(Yes));
         public static string No => Text(nameof(No));
         public static string ConfirmDeleteAccount => Text(nameof(ConfirmDeleteAccount));
         public static string ConfirmDeleteBill => Text(nameof(ConfirmDeleteBill));
         public static string TitleDateFormat => Text(nameof(TitleDateFormat));
+        public static string TitleShortDateFormat => Text(nameof(TitleShortDateFormat));
         public static string DateRangeFormat => Text(nameof(DateRangeFormat));
+        public static string Custom => Text(nameof(Custom));
+        public static string Monthly => Text(nameof(Monthly));
+        public static string Today => Text(nameof(Today));
+        public static string PastMonth => Text(nameof(PastMonth));
+        public static string PastQuarter => Text(nameof(PastQuarter));
+        public static string PastSixMonths => Text(nameof(PastSixMonths));
+        public static string PastYear => Text(nameof(PastYear));
+        public static string Total => Text(nameof(Total));
         public static string Cash => Text(nameof(Cash));
         public static string CreditCard => Text(nameof(CreditCard));
         public static string DebitCard => Text(nameof(DebitCard));
@@ -29,9 +39,15 @@ namespace Billing.Languages
         public static string AmountRequired => Text(nameof(AmountRequired));
         public static string Income => Text(nameof(Income));
         public static string Spending => Text(nameof(Spending));
+        public static string LastSelected => Text(nameof(LastSelected));
+        public static string Recent => Text(nameof(Recent));
         public static string CategoryManage => Text(nameof(CategoryManage));
         public static string AddCategory => Text(nameof(AddCategory));
         public static string ConfirmDeleteCategory => Text(nameof(ConfirmDeleteCategory));
+        public static string ShareLogs => Text(nameof(ShareLogs));
+        public static string ManyRecords => Text(nameof(ManyRecords));
+        public static string SendEmail => Text(nameof(SendEmail));
+        public static string HowToShareDiagnostic => Text(nameof(HowToShareDiagnostic));
 
         #region Categories
         public static string Clothing => Text(nameof(Clothing));

Billing.Shared/Languages/en.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <root>
 	<Ok>OK</Ok>
+	<Cancel>Cancel</Cancel>
 	<About>About</About>
 	<Version>Version</Version>
 	<Preference>Preference</Preference>
@@ -19,7 +20,19 @@
 	<NoRecords>Bills not yet generated</NoRecords>
 	<TapToMemo>Click here to record</TapToMemo>
 	<TitleDateFormat>MM/dd/yyyy</TitleDateFormat>
+	<TitleShortDateFormat>MM/dd/yyyy</TitleShortDateFormat>
 	<DateRangeFormat>MM/dd</DateRangeFormat>
+	<To>To</To>
+	<Type>Type</Type>
+	<Preset>Preset</Preset>
+	<Custom>Custom</Custom>
+	<Monthly>Monthly</Monthly>
+	<Today>Today</Today>
+	<PastMonth>Past Month</PastMonth>
+	<PastQuarter>Past Quarter</PastQuarter>
+	<PastSixMonths>Past Six Months</PastSixMonths>
+	<PastYear>Past Year</PastYear>
+	<Total>Total</Total>
 	<Balance>Balance</Balance>
 	<Assets>Assets</Assets>
 	<Liability>Liability</Liability>
@@ -52,6 +65,8 @@
 	<AmountRequired>Please enter the amount.</AmountRequired>
 	<Income>Income</Income>
 	<Spending>Spending</Spending>
+	<LastSelected>Last Selected</LastSelected>
+	<Recent>Recent</Recent>
 	<Clothing>Clothing</Clothing>
 	<Food>Food</Food>
 	<Drinks>Drinks</Drinks>
@@ -86,6 +101,7 @@
 	<Feature>Feature</Feature>
 	<CategoryManage>Category Management</CategoryManage>
 	<Detail>Detail</Detail>
+	<SaveLocation>Save Location</SaveLocation>
 	<AddCategory>Add Category</AddCategory>
 	<ConfirmDeleteCategory>Are you sure you want to delete the category: {0}?</ConfirmDeleteCategory>
 	<SelectCategory>Select Category</SelectCategory>
@@ -93,4 +109,10 @@
 	<NoResult>(no results)</NoResult>
 	<Top10>Top 10</Top10>
 	<CategoryRank>Category Ranking</CategoryRank>
+	<Diagnostic>Diagnostic</Diagnostic>
+	<ShareLogs>Share Logs</ShareLogs>
+	<ManyRecords>{0} record(s)</ManyRecords>
+	<SendEmail>Send Eamil</SendEmail>
+	<HowToShareDiagnostic>How would you like to share diagnostic logs?</HowToShareDiagnostic>
+	<ViewLocation>View Location</ViewLocation>
 </root>

Billing.Shared/Languages/zh-CN.xml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <root>
 	<Ok>确定</Ok>
+	<Cancel>取消</Cancel>
 	<About>关于</About>
 	<Version>版本号</Version>
 	<Preference>偏好</Preference>
@@ -19,7 +20,19 @@
 	<NoRecords>还未产生账单</NoRecords>
 	<TapToMemo>点此记录</TapToMemo>
 	<TitleDateFormat>yyyy年MM月dd日</TitleDateFormat>
+	<TitleShortDateFormat>yyyy/MM/dd</TitleShortDateFormat>
 	<DateRangeFormat>MM月dd日</DateRangeFormat>
+	<To>至</To>
+	<Type>类型</Type>
+	<Preset>预设</Preset>
+	<Custom>自定义</Custom>
+	<Monthly>当月</Monthly>
+	<Today>今日</Today>
+	<PastMonth>一个月</PastMonth>
+	<PastQuarter>一个季度</PastQuarter>
+	<PastSixMonths>六个月</PastSixMonths>
+	<PastYear>一年</PastYear>
+	<Total>全部</Total>
 	<Balance>余额</Balance>
 	<Assets>资产</Assets>
 	<Liability>负债</Liability>
@@ -52,6 +65,8 @@
 	<AmountRequired>请输入金额。</AmountRequired>
 	<Income>收入</Income>
 	<Spending>支出</Spending>
+	<LastSelected>最后选择</LastSelected>
+	<Recent>最近</Recent>
 	<Clothing>衣物</Clothing>
 	<Food>食品</Food>
 	<Drinks>饮料</Drinks>
@@ -86,6 +101,7 @@
 	<Feature>功能</Feature>
 	<CategoryManage>分类管理</CategoryManage>
 	<Detail>详细</Detail>
+	<SaveLocation>保存位置</SaveLocation>
 	<AddCategory>新建分类</AddCategory>
 	<ConfirmDeleteCategory>是否确认删除该分类：{0}？</ConfirmDeleteCategory>
 	<SelectCategory>选择类别</SelectCategory>
@@ -93,4 +109,10 @@
 	<NoResult>（无记录）</NoResult>
 	<Top10>Top 10</Top10>
 	<CategoryRank>分类排行</CategoryRank>
+	<Diagnostic>诊断</Diagnostic>
+	<ShareLogs>发送日志</ShareLogs>
+	<ManyRecords>{0} 条记录</ManyRecords>
+	<SendEmail>发送邮件</SendEmail>
+	<HowToShareDiagnostic>您想以哪种方式分享诊断日志？</HowToShareDiagnostic>
+	<ViewLocation>查看位置</ViewLocation>
 </root>

Billing.Shared/LocationExtension.cs

@@ -0,0 +1,88 @@
+using System;
+
+namespace Billing
+{
+    public static class LocationExtension
+    {
+        private const double PI = 3.1415926535897931;
+        private const double A = 6378245d;
+        private const double EE = 0.00669342162296594323;
+
+        public static (double longitude, double latitude) Wgs84ToGcj02(this (double lon, double lat) position)
+        {
+            return Transform(position);
+        }
+
+        public static (double longitude, double latitude) Gcj02ToWgs84(this (double lon, double lat) position)
+        {
+            (double longitude, double latitude) = Transform(position);
+            longitude = position.lon * 2d - longitude;
+            latitude = position.lat * 2d - latitude;
+            return (longitude, latitude);
+        }
+
+        public static (double longitude, double latitude) Gcj02ToBd09(this (double lon, double lat) position)
+        {
+            double x = position.lon;
+            double y = position.lat;
+            double z = Math.Sqrt(x * x + y * y) + 0.00002 * Math.Sin(y * PI);
+            double theta = Math.Atan2(y, x) + 0.000003 * Math.Cos(x * PI);
+            double longitude = z * Math.Cos(theta) + 0.0065;
+            double latitude = z * Math.Sin(theta) + 0.006;
+            return (longitude, latitude);
+        }
+
+        public static (double longitude, double latitude) Bd09ToGcj02(this (double lon, double lat) position)
+        {
+            double x = position.lon - 0.0065;
+            double y = position.lat - 0.006;
+            double z = Math.Sqrt(x * x + y * y) - 0.00002 * Math.Sin(y * PI);
+            double theta = Math.Atan2(y, x) - 0.000003 * Math.Cos(x * PI);
+            double longitude = z * Math.Cos(theta);
+            double latitude = z * Math.Sin(theta);
+            return (longitude, latitude);
+        }
+
+        private static (double longitude, double latitude) Transform(this (double lon, double lat) position)
+        {
+            if (IsOutOfChina(position.lon, position.lat))
+            {
+                return position;
+            }
+
+            var offsetLatitude = TransformLatitude(position.lon - 105d, position.lat - 35d);
+            var offsetLongitude = TransformLongitude(position.lon - 105d, position.lat - 35d);
+            var radiusLatitude = position.lat / 180d * PI;
+            var magic = 1d - EE * Math.Pow(Math.Sin(radiusLatitude), 2);
+            var sqrtMagic = Math.Sqrt(magic);
+            offsetLatitude = offsetLatitude * 180d / (A * (1d - EE) / (magic * sqrtMagic) * PI);
+            offsetLongitude = offsetLongitude * 180d / (A / sqrtMagic * Math.Cos(radiusLatitude) * PI);
+            return (position.lon + offsetLongitude, position.lat + offsetLatitude);
+        }
+
+        private static bool IsOutOfChina(double lon, double lat)
+        {
+            return lon < 72.004 || lon > 137.8347
+                || lat < 0.8293 || lat > 55.8171;
+        }
+
+        private static double TransformLatitude(double x, double y)
+        {
+            var ret = -100d + 2d * x + 3d * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.Sqrt(Math.Abs(x));
+            ret += (20d * Math.Sin(6d * x * PI) + 20d * Math.Sin(2d * x * PI)) * 2d / 3d;
+            ret += (20d * Math.Sin(y * PI) + 40d * Math.Sin(y / 3d * PI)) * 2d / 3d;
+            ret += (160d * Math.Sin(y / 12d * PI) + 320d * Math.Sin(y * PI / 30d)) * 2d / 3d;
+            return ret;
+        }
+
+        private static double TransformLongitude(double x, double y)
+        {
+            var ret = 300d + x + 2d * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.Sqrt(Math.Abs(x));
+            ret += (20d * Math.Sin(6d * x * PI) + 20d * Math.Sin(2d * x * PI)) * 2d / 3d;
+            ret += (20d * Math.Sin(x * PI) + 40d * Math.Sin(x / 3d * PI)) * 2d / 3d;
+            ret += (150d * Math.Sin(x / 12d * PI) + 300d * Math.Sin(x / 30d * PI)) * 2d / 3d;
+            return ret;
+        }
+
+    }
+}

Billing.Shared/MainShell.xaml

@@ -1,6 +1,7 @@
 <?xml version="1.0" encoding="utf-8" ?>
 <Shell xmlns="http://xamarin.com/schemas/2014/forms"
        xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+       xmlns:local="clr-namespace:Billing"
        xmlns:v="clr-namespace:Billing.Views"
        xmlns:r="clr-namespace:Billing.Languages"
        x:Class="Billing.MainShell"
@@ -9,11 +10,14 @@
        TitleColor="{DynamicResource PrimaryColor}"
        Shell.NavBarHasShadow="True">
 
+    <FlyoutItem>
+        <ShellContent ContentTemplate="{DataTemplate local:SplashPage}" Route="Splash"/>
+    </FlyoutItem>
+
     <TabBar>
         <ShellContent ContentTemplate="{DataTemplate v:AccountPage}" Route="Accounts" Title="{r:Text Accounts}" Icon="wallet.png"/>
         <ShellContent ContentTemplate="{DataTemplate v:BillPage}" Route="Bills" Title="{r:Text Bills}" Icon="bill.png"/>
         <ShellContent ContentTemplate="{DataTemplate v:RankPage}" Route="Ranks" Title="{r:Text Report}" Icon="rank.png"/>
         <ShellContent ContentTemplate="{DataTemplate v:SettingPage}" Route="Settings" Title="{r:Text Settings}" Icon="settings.png"/>
     </TabBar>
-
 </Shell>

Billing.Shared/MainShell.xaml.cs

@@ -1,3 +1,4 @@
+using Billing.Views;
 using Xamarin.Forms;
 
 namespace Billing
@@ -6,6 +7,8 @@ namespace Billing
     {
         public MainShell()
         {
+            Routing.RegisterRoute("Bills/Details", typeof(AddBillPage));
+
             InitializeComponent();
         }
     }

Billing.Shared/Models/Account.cs

@@ -1,9 +1,15 @@
-using System.Xml.Linq;
+using SQLite;
 
 namespace Billing.Models
 {
-    public class Account : BaseModel
+    public class Account : IIdItem
     {
+        private const string ICON_DEFAULT = "ic_default";
+
+        private static Account empty;
+        public static Account Empty => empty ??= new() { Id = -1 };
+
+        [PrimaryKey, AutoIncrement]
         public int Id { get; set; }
         public string Icon { get; set; } = ICON_DEFAULT;
         public AccountCategory Category { get; set; }
@@ -11,28 +17,6 @@ namespace Billing.Models
         public decimal Initial { get; set; }
         public decimal Balance { get; set; }
         public string Memo { get; set; }
-
-        public override void OnXmlDeserialize(XElement node)
-        {
-            Id = Read(node, nameof(Id), 0);
-            Icon = Read(node, nameof(Icon), ICON_DEFAULT);
-            Category = (AccountCategory)Read(node, nameof(Category), 0);
-            Name = Read(node, nameof(Name), string.Empty);
-            Initial = Read(node, nameof(Initial), 0m);
-            Balance = Read(node, nameof(Balance), 0m);
-            Memo = Read(node, nameof(Memo), null);
-        }
-
-        public override void OnXmlSerialize(XElement node)
-        {
-            Write(node, nameof(Id), Id);
-            Write(node, nameof(Icon), Icon);
-            Write(node, nameof(Category), (int)Category);
-            Write(node, nameof(Name), Name);
-            Write(node, nameof(Initial), Initial);
-            Write(node, nameof(Balance), Balance);
-            Write(node, nameof(Memo), Memo);
-        }
     }
 
     public enum AccountCategory

Billing.Shared/Models/BaseModel.cs

@@ -1,186 +0,0 @@
-using System;
-using System.Globalization;
-using System.IO;
-using System.Linq;
-using System.Text;
-using System.Xml.Linq;
-
-namespace Billing.Models
-{
-    public interface IModel
-    {
-        void OnXmlSerialize(XElement node);
-
-        void OnXmlDeserialize(XElement node);
-    }
-
-    public abstract class BaseModel : IModel, IDisposable
-    {
-        public const string ICON_DEFAULT = "ic_default";
-
-        private bool disposed = false;
-
-        public static T ParseXml<T>(string xml) where T : BaseModel, new()
-        {
-            XDocument doc = XDocument.Parse(xml);
-            T model = new();
-            model.OnXmlDeserialize(doc.Root);
-            return model;
-        }
-
-        protected static string ToString(IFormattable v) => v.ToString(null, CultureInfo.InvariantCulture);
-        protected static double ParseDouble(string s) => double.Parse(s, CultureInfo.InvariantCulture);
-        protected static decimal ParseDecimal(string s) => decimal.Parse(s, CultureInfo.InvariantCulture);
-        protected static int ParseInt(string s) => int.Parse(s, CultureInfo.InvariantCulture);
-        protected static long ParseLong(string s) => long.Parse(s, CultureInfo.InvariantCulture);
-
-        protected static bool IsTrue(string s) =>
-            string.Equals(s, "true", StringComparison.OrdinalIgnoreCase) ||
-            string.Equals(s, "yes", StringComparison.OrdinalIgnoreCase) ||
-            s == "1";
-
-        #region Private Methods
-
-        private static XElement WriteString(XElement parent, string name, string val, Action<XElement> action = null)
-        {
-            XElement ele;
-            if (val == null)
-            {
-                ele = new XElement(name);
-            }
-            else
-            {
-                ele = new XElement(name, val);
-            }
-            action?.Invoke(ele);
-            parent.Add(ele);
-            return ele;
-        }
-
-        private static T ReadSubnode<T>(XElement node, string subname, Func<XElement, T> func)
-        {
-            var ele = node.Elements().FirstOrDefault(e => string.Equals(e.Name.ToString(), subname, StringComparison.OrdinalIgnoreCase));
-            return func(ele);
-        }
-
-        private static T ReadObject<T>(XElement node) where T : IModel, new()
-        {
-            if (IsTrue(node.Attribute("null")?.Value))
-            {
-                return default;
-            }
-            T value = new();
-            value.OnXmlDeserialize(node);
-            return value;
-        }
-
-        private static T[] ReadArray<T>(XElement node) where T : IModel, new()
-        {
-            if (IsTrue(node.Attribute("null")?.Value))
-            {
-                return default;
-            }
-            int count = ParseInt(node.Attribute("count").Value);
-            T[] array = new T[count];
-            foreach (XElement ele in node.Elements("item"))
-            {
-                int index = ParseInt(ele.Attribute("index").Value);
-                array[index] = ReadObject<T>(ele);
-            }
-            return array;
-        }
-
-        #endregion
-
-        #region Read/Write Helper
-
-        protected static XElement Write(XElement parent, string name, string val) => WriteString(parent, name, val);
-        protected static XElement Write(XElement parent, string name, DateTime date) => WriteString(parent, name, ToString(date.Ticks));
-        protected static XElement Write<T>(XElement parent, string name, T value) where T : IFormattable => WriteString(parent, name, ToString(value));
-        protected static XElement WriteObject<T>(XElement parent, string name, T value) where T : IModel => WriteString(parent, name, null,
-            action: ele =>
-            {
-                if (value == null)
-                {
-                    ele.Add(new XAttribute("null", 1));
-                }
-                else
-                {
-                    value.OnXmlSerialize(ele);
-                }
-            });
-        protected static XElement WriteArray<T>(XElement parent, string name, T[] value) where T : IModel => WriteString(parent, name, null,
-            action: ele =>
-            {
-                if (value == null)
-                {
-                    ele.Add(new XAttribute("null", 1));
-                }
-                else
-                {
-                    ele.Add(new XAttribute("count", value.Length));
-                    for (var i = 0; i < value.Length; i++)
-                    {
-                        XElement item = WriteObject(ele, "item", value[i]);
-                        item.Add(new XAttribute("index", i));
-                    }
-                }
-            });
-
-        protected static string Read(XElement node, string subname, string def) => ReadSubnode(node, subname, e => e?.Value ?? def);
-        protected static int Read(XElement node, string subname, int def) => ReadSubnode(node, subname, e => e == null ? def : ParseInt(e.Value));
-        protected static long Read(XElement node, string subname, long def) => ReadSubnode(node, subname, e => e == null ? def : ParseLong(e.Value));
-        protected static double Read(XElement node, string subname, double def) => ReadSubnode(node, subname, e => e == null ? def : ParseDouble(e.Value));
-        protected static decimal Read(XElement node, string subname, decimal def) => ReadSubnode(node, subname, e => e == null ? def : ParseDecimal(e.Value));
-        protected static DateTime Read(XElement node, string subname, DateTime def) => ReadSubnode(node, subname, e => e == null ? def : new DateTime(ParseLong(e.Value)));
-        protected static T ReadObject<T>(XElement node, string subname, T def = default) where T : IModel, new() => ReadSubnode(node, subname, e => e == null ? def : ReadObject<T>(e));
-        protected static T[] ReadArray<T>(XElement node, string subname, T[] def = null) where T : IModel, new() => ReadSubnode(node, subname, e => e == null ? def : ReadArray<T>(e));
-
-        #endregion
-
-        public XDocument ToXml()
-        {
-            XDocument xdoc = new(new XDeclaration("1.0", "utf-8", "yes"), new XElement("root"));
-            ToXml(xdoc.Root);
-            return xdoc;
-        }
-
-        public void ToXml(XElement node)
-        {
-            OnXmlSerialize(node);
-        }
-
-        public void SaveToStream(Stream stream)
-        {
-            ToXml().Save(stream, SaveOptions.DisableFormatting);
-        }
-
-        public abstract void OnXmlSerialize(XElement node);
-        public abstract void OnXmlDeserialize(XElement node);
-
-
-        public override string ToString()
-        {
-            using MemoryStream ms = new();
-            //using StreamWriter writer = new(ms, Encoding.UTF8);
-            //XDocument xdoc = ToXml();
-            //xdoc.Save(writer, SaveOptions.DisableFormatting);
-            //writer.Flush();
-            SaveToStream(ms);
-            ms.Seek(0, SeekOrigin.Begin);
-            using StreamReader reader = new(ms, Encoding.UTF8);
-            return reader.ReadToEnd();
-        }
-
-        protected virtual void Dispose(bool dispose) { }
-
-        public void Dispose()
-        {
-            if (!disposed)
-            {
-                Dispose(true);
-                disposed = true;
-            }
-        }
-    }
-}

Billing.Shared/Models/Bill.cs

@@ -1,10 +1,11 @@
 using System;
-using System.Xml.Linq;
+using SQLite;
 
 namespace Billing.Models
 {
-    public class Bill : BaseModel
+    public class Bill : IIdItem
     {
+        [PrimaryKey, AutoIncrement]
         public int Id { get; set; }
         public decimal Amount { get; set; }
         public string Name { get; set; }
@@ -13,29 +14,10 @@ namespace Billing.Models
         public string Store { get; set; }
         public DateTime CreateTime { get; set; }
         public string Note { get; set; }
-
+        public double? Latitude { get; set; }
-        public override void OnXmlDeserialize(XElement node)
+        public double? Longitude { get; set; }
-        {
+        public double? Altitude { get; set; }
-            Id = Read(node, nameof(Id), 0);
+        public double? Accuracy { get; set; }
-            Amount = Read(node, nameof(Amount), 0m);
+        public bool? IsGps { get; set; }
-            Name = Read(node, nameof(Name), string.Empty);
-            CategoryId = Read(node, nameof(CategoryId), -1);
-            WalletId = Read(node, nameof(WalletId), -1);
-            Store = Read(node, nameof(Store), string.Empty);
-            CreateTime = Read(node, nameof(CreateTime), default(DateTime));
-            Note = Read(node, nameof(Note), string.Empty);
-        }
-
-        public override void OnXmlSerialize(XElement node)
-        {
-            Write(node, nameof(Id), Id);
-            Write(node, nameof(Amount), Amount);
-            Write(node, nameof(Name), Name);
-            Write(node, nameof(CategoryId), CategoryId);
-            Write(node, nameof(WalletId), WalletId);
-            Write(node, nameof(Store), Store);
-            Write(node, nameof(CreateTime), CreateTime);
-            Write(node, nameof(Note), Note);
-        }
     }
 }

Billing.Shared/Models/Category.cs

@@ -1,50 +1,25 @@
-using Xamarin.Forms;
+using SQLite;
-using System.Xml.Linq;
+using System;
-
+
 namespace Billing.Models
 {
-    public class Category : BaseModel
+    public class Category : IIdItem
     {
+        private const string ICON_DEFAULT = "ic_default";
+        private const long TRANSPARENT_COLOR = 0x00ffffffL;
+
+        private static Category empty;
+        public static Category Empty => empty ??= new() { Id = -1 };
+
+        [PrimaryKey, AutoIncrement]
         public int Id { get; set; }
         public CategoryType Type { get; set; }
         public string Icon { get; set; } = ICON_DEFAULT;
         public string Name { get; set; }
-        public Color TintColor { get; set; } = Color.Transparent;
+        public long TintColor { get; set; } = TRANSPARENT_COLOR;
         public int? ParentId { get; set; }
-
+        public DateTime? LastUsed { get; set; }
-        public override void OnXmlDeserialize(XElement node)
+        public int? LastAccountId { get; set; }
-        {
-            Id = Read(node, nameof(Id), 0);
-            Type = (CategoryType)Read(node, nameof(Type), 0);
-            Icon = Read(node, nameof(Icon), ICON_DEFAULT);
-            Name = Read(node, nameof(Name), string.Empty);
-            var color = Read(node, nameof(TintColor), string.Empty);
-            if (!string.IsNullOrEmpty(color))
-            {
-                TintColor = Color.FromHex(color);
-            }
-            var parentId = Read(node, nameof(ParentId), -1);
-            if (parentId >= 0)
-            {
-                ParentId = parentId;
-            }
-        }
-
-        public override void OnXmlSerialize(XElement node)
-        {
-            Write(node, nameof(Id), Id);
-            Write(node, nameof(Type), (int)Type);
-            Write(node, nameof(Icon), Icon);
-            Write(node, nameof(Name), Name);
-            if (TintColor != Color.Transparent)
-            {
-                Write(node, nameof(TintColor), TintColor.ToHex());
-            }
-            if (ParentId != null)
-            {
-                Write(node, nameof(ParentId), ParentId.Value);
-            }
-        }
     }
 
     public enum CategoryType

Billing.Shared/Models/IIdItem.cs

@@ -0,0 +1,7 @@
+namespace Billing.Models
+{
+    public interface IIdItem
+    {
+        public int Id { get; set; }
+    }
+}

Billing.Shared/Models/Logs.cs

@@ -0,0 +1,14 @@
+using System;
+using SQLite;
+
+namespace Billing.Models
+{
+    public class Logs : IIdItem
+    {
+        [PrimaryKey, AutoIncrement]
+        public int Id { get; set; }
+        public DateTime LogTime { get; set; }
+        public string Category { get; set; }
+        public string Detail { get; set; }
+    }
+}

Billing.Shared/SplashPage.xaml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<ui:BillingPage xmlns="http://xamarin.com/schemas/2014/forms"
+                xmlns:ui="clr-namespace:Billing.UI"
+                xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+                x:Class="Billing.SplashPage"
+                Shell.NavBarIsVisible="False"
+                Shell.TabBarIsVisible="False">
+    <!--<Label Text="Loading..." HorizontalOptions="Center" VerticalOptions="Center"/>-->
+</ui:BillingPage>

Billing.Shared/SplashPage.xaml.cs

@@ -0,0 +1,23 @@
+using Billing.UI;
+using Xamarin.Forms;
+
+namespace Billing
+{
+    public partial class SplashPage : BillingPage
+    {
+        public SplashPage()
+        {
+            InitializeComponent();
+        }
+
+        protected override async void OnLoaded()
+        {
+            if (!string.IsNullOrEmpty(App.MainRoute))
+            {
+                await App.InitializeData();
+
+                await Shell.Current.GoToAsync(App.MainRoute);
+            }
+        }
+    }
+}

Billing.Shared/Store/StoreHelper.cs

@@ -3,7 +3,7 @@ using System.Collections.Generic;
 using System.IO;
 using System.Threading.Tasks;
 using Billing.Models;
-using Billing.UI;
+using SQLite;
 using Xamarin.Essentials;
 using Resource = Billing.Languages.Resource;
 
@@ -14,130 +14,309 @@ namespace Billing.Store
         public static readonly string PersonalFolder = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
         public static readonly string CacheFolder = FileSystem.CacheDirectory;
 
-        private const string accountFile = "accounts.xml";
+        public static string DatabasePath => Path.Combine(PersonalFolder, dbfile);
-        private const string billFile = "bills.xml";
-        private const string categoryFile = "categories.xml";
 
-        private static StoreHelper instance;
+        #region Sqlite3
-        private static StoreHelper Instance => instance ??= new StoreHelper();
+        private const string dbfile = ".master.db3";
+        private static SQLiteAsyncConnection database;
+        #endregion
 
-        public static List<Account> GetAccounts() => Instance.GetAccountsInternal();
+        public static async Task<bool> ReloadDatabase(string file)
-        public static void WriteAccounts(IEnumerable<Account> accounts) => Instance.WriteAccountsInternal(accounts);
-        public static List<Bill> GetBills() => Instance.GetBillsInternal();
-        public static void WriteBills(IEnumerable<Bill> bills) => Instance.WriteBillsInternal(bills);
-        public static List<Category> GetCategories() => Instance.GetCategoriesInternal();
-        public static void WriteCategories(IEnumerable<Category> categories) => Instance.WriteCategoriesInternal(categories);
-
-        private StoreHelper() { }
-
-        private List<Account> GetAccountsInternal()
         {
-            return GetList<Account>(Path.Combine(PersonalFolder, accountFile));
+            var path = DatabasePath;
-        }
+            if (string.Equals(file, path, StringComparison.OrdinalIgnoreCase))
-
-        private void WriteAccountsInternal(IEnumerable<Account> accounts)
-        {
-            var filename = Path.Combine(PersonalFolder, accountFile);
-            WriteList(filename, accounts);
-        }
-
-        private List<Bill> GetBillsInternal()
-        {
-            return GetList<Bill>(Path.Combine(PersonalFolder, billFile));
-        }
-
-        private void WriteBillsInternal(IEnumerable<Bill> bills)
-        {
-            var filename = Path.Combine(PersonalFolder, billFile);
-            WriteList(filename, bills);
-        }
-
-        private List<Category> GetCategoriesInternal()
-        {
-            var list = GetList<Category>(Path.Combine(PersonalFolder, categoryFile));
-            if (list == null || list.Count == 0)
             {
-                list = new List<Category>
+                return false;
-                {
-                    // sample categories
-                    new() { Id = 1, Name = Resource.Clothing, Icon = "clothes" },
-                    new() { Id = 2, Name = Resource.Food, Icon = "food" },
-                    new() { Id = 4, Name = Resource.Daily, Icon = "daily" },
-                    new() { Id = 5, Name = Resource.Trans, Icon = "trans" },
-                    new() { Id = 6, Name = Resource.Entertainment, Icon = "face" },
-                    new() { Id = 7, Name = Resource.Learn, Icon = "learn" },
-                    new() { Id = 8, Name = Resource.Medical, Icon = "medical" },
-                    new() { Id = 9, Name = Resource.OtherSpending, Icon = "plus" },
-
-                    new() { Id = 10, Type = CategoryType.Income, Name = Resource.Earnings, Icon = "#brand#btc" },
-                    new() { Id = 20, Type = CategoryType.Income, Name = Resource.OtherIncome, Icon = "plus" },
-
-                    // sub-categories
-                    new() { Id = 100, ParentId = 1, Name = Resource.Jewellery, Icon = "gem" },
-                    new() { Id = 101, ParentId = 1, Name = Resource.Cosmetics, Icon = "makeup" },
-                    new() { Id = 102, ParentId = 2, Name = Resource.Brunch, Icon = "brunch" },
-                    new() { Id = 103, ParentId = 2, Name = Resource.Dinner, Icon = "dinner" },
-                    new() { Id = 104, ParentId = 2, Name = Resource.Drinks, Icon = "drink" },
-                    new() { Id = 105, ParentId = 2, Name = Resource.Fruit, Icon = "fruit" },
-                    new() { Id = 106, ParentId = 4, Name = Resource.UtilityBill, Icon = "bill" },
-                    new() { Id = 107, ParentId = 4, Name = Resource.PropertyFee, Icon = "fee" },
-                    new() { Id = 108, ParentId = 4, Name = Resource.Rent, Icon = "rent" },
-                    new() { Id = 109, ParentId = 4, Name = Resource.Maintenance, Icon = "maintenance" },
-                    new() { Id = 110, ParentId = 5, Name = Resource.LightRail, Icon = "rail" },
-                    new() { Id = 111, ParentId = 5, Name = Resource.Taxi, Icon = "taxi" },
-                    new() { Id = 112, ParentId = 6, Name = Resource.Fitness, Icon = "fitness" },
-                    new() { Id = 113, ParentId = 6, Name = Resource.Party, Icon = "party" },
-                    new() { Id = 200, ParentId = 10, Type = CategoryType.Income, Name = Resource.Salary, Icon = "#brand#buffer" },
-                    new() { Id = 201, ParentId = 10, Type = CategoryType.Income, Name = Resource.Bonus, Icon = "dollar" },
-                };
-                Task.Run(() => WriteCategoriesInternal(list));
-            }
-            return list;
-        }
-
-        private void WriteCategoriesInternal(IEnumerable<Category> categories)
-        {
-            var filename = Path.Combine(PersonalFolder, categoryFile);
-            WriteList(filename, categories);
-        }
-
-        #region Helper
-
-        private void WriteList<T>(string filename, IEnumerable<T> list) where T : IModel, new()
-        {
-            if (list == null)
-            {
-                return;
             }
             try
             {
-                using var stream = File.Open(filename, FileMode.Create);
+                if (database != null)
-                list.ToStream(stream);
-            }
-            catch (Exception ex)
-            {
-                Helper.Error("file.write", $"failed to write file: {filename}, error: {ex.Message}");
-            }
-        }
-
-        private List<T> GetList<T>(string file) where T : IModel, new()
-        {
-            try
-            {
-                if (File.Exists(file))
                 {
-                    using var stream = File.OpenRead(file);
+                    await database.CloseAsync();
-                    var list = ModelExtensionHelper.FromStream<T>(stream);
-                    return list;
                 }
             }
             catch (Exception ex)
             {
-                Helper.Error("file.read", $"failed to read file: {file}, error: {ex.Message}");
+                Helper.Error("database.close", ex);
+                return false;
+            }
+            try
+            {
+                File.Copy(file, path, true);
+                File.Delete(file);
+            }
+            catch (Exception ex)
+            {
+                Helper.Error("file.import", ex);
+            }
+            try
+            {
+                database = new SQLiteAsyncConnection(path,
+                    SQLiteOpenFlags.ReadWrite |
+                    SQLiteOpenFlags.Create |
+                    SQLiteOpenFlags.SharedCache);
+                return true;
+            }
+            catch (Exception ex)
+            {
+                Helper.Error("database.connect", ex);
+                return false;
+            }
+        }
+
+        public static readonly AsyncLazy<StoreHelper> Instance = new(async () =>
+        {
+            var instance = new StoreHelper();
+            try
+            {
+                await database.CreateTablesAsync<Category, Account, Bill, Logs>();
+            } catch (Exception ex)
+            {
+                Helper.Error("database.init.table", ex);
+            }
+            try
+            {
+                var count = await database.ExecuteScalarAsync<int>("SELECT COUNT(Id) FROM [Account]");
+                if (count <= 0)
+                {
+                    await database.InsertAsync(new Account { Name = Resource.Cash, Icon = "wallet" });
+                }
+            }
+            catch (Exception ex)
+            {
+                Helper.Error("database.init.account", ex);
+            }
+            try
+            {
+                var count = await database.ExecuteScalarAsync<int>("SELECT COUNT(Id) FROM [Category]");
+                if (count <= 0)
+                {
+                    // init categories
+                    await database.InsertAllAsync(new List<Category>
+                    {
+                        // sample categories
+                        new() { Name = Resource.Clothing, Icon = "clothes" },
+                        new() { Name = Resource.Food, Icon = "food" },
+                        new() { Name = Resource.Daily, Icon = "daily" },
+                        new() { Name = Resource.Trans, Icon = "trans" },
+                        new() { Name = Resource.Entertainment, Icon = "face" },
+                        new() { Name = Resource.Learn, Icon = "learn" },
+                        new() { Name = Resource.Medical, Icon = "medical" },
+                        new() { Name = Resource.OtherSpending, Icon = "plus" },
+
+                        new() { Type = CategoryType.Income, Name = Resource.Earnings, Icon = "#brand#btc" },
+                        new() { Type = CategoryType.Income, Name = Resource.OtherIncome, Icon = "plus" },
+
+                        // sub-categories
+                        new() { ParentId = 1, Name = Resource.Jewellery, Icon = "gem" },
+                        new() { ParentId = 1, Name = Resource.Cosmetics, Icon = "makeup" },
+                        new() { ParentId = 2, Name = Resource.Brunch, Icon = "brunch" },
+                        new() { ParentId = 2, Name = Resource.Dinner, Icon = "dinner" },
+                        new() { ParentId = 2, Name = Resource.Drinks, Icon = "drink" },
+                        new() { ParentId = 2, Name = Resource.Fruit, Icon = "fruit" },
+                        new() { ParentId = 3, Name = Resource.UtilityBill, Icon = "bill" },
+                        new() { ParentId = 3, Name = Resource.PropertyFee, Icon = "fee" },
+                        new() { ParentId = 3, Name = Resource.Rent, Icon = "rent" },
+                        new() { ParentId = 3, Name = Resource.Maintenance, Icon = "maintenance" },
+                        new() { ParentId = 4, Name = Resource.LightRail, Icon = "rail" },
+                        new() { ParentId = 4, Name = Resource.Taxi, Icon = "taxi" },
+                        new() { ParentId = 5, Name = Resource.Fitness, Icon = "fitness" },
+                        new() { ParentId = 5, Name = Resource.Party, Icon = "party" },
+                        new() { ParentId = 9, Type = CategoryType.Income, Name = Resource.Salary, Icon = "#brand#buffer" },
+                        new() { ParentId = 9, Type = CategoryType.Income, Name = Resource.Bonus, Icon = "dollar" },
+                    });
+                }
+            }
+            catch (Exception ex)
+            {
+                Helper.Error("database.init.category", ex);
+            }
+            return instance;
+        });
+
+        public static async Task<int> SaveAccountItemAsync(Account account)
+        {
+            var instance = await Instance;
+            return await instance.SaveItemAsync(account);
+        }
+        public static async Task<int> DeleteAccountItemAsync(Account account)
+        {
+            var instance = await Instance;
+            return await instance.DeleteItemAsync(account);
+        }
+
+        public static async Task<int> SaveBillItemAsync(Bill bill)
+        {
+            var instance = await Instance;
+            return await instance.SaveItemAsync(bill);
+        }
+        public static async Task<int> DeleteBillItemAsync(Bill bill)
+        {
+            var instance = await Instance;
+            return await instance.DeleteItemAsync(bill);
+        }
+
+        public static async Task<int> SaveCategoryItemAsync(Category category)
+        {
+            var instance = await Instance;
+            return await instance.SaveItemAsync(category);
+        }
+        public static async Task<int> DeleteCategoryItemAsync(Category category)
+        {
+            var instance = await Instance;
+            return await instance.DeleteItemAsync(category);
+        }
+
+        public static async Task<int> GetLogsCount()
+        {
+            await Instance;
+            try
+            {
+                return await database.ExecuteScalarAsync<int>("SELECT COUNT(Id) FROM [Logs]");
+            }
+            catch (SQLiteException)
+            {
+                await database.CreateTableAsync<Logs>();
+                return 0;
+            }
+        }
+        public static async Task<int> SaveLogItemAsync(Logs log)
+        {
+            var instance = await Instance;
+            return await instance.SaveItemAsync(log);
+        }
+        public static string GetLogFile()
+        {
+            return Path.Combine(CacheFolder, "logs.csv");
+        }
+        public static async Task<string> ExportLogs()
+        {
+            try
+            {
+                var instance = await Instance;
+                var logs = await instance.GetListAsync<Logs>();
+                var file = GetLogFile();
+                using var writer = new StreamWriter(File.Open(file, FileMode.Create, FileAccess.Write));
+                writer.WriteLine("Id,DateTime,Category,Detail");
+                foreach (var log in logs)
+                {
+                    var category = log.Category?.Replace("\n", " \\n ");
+                    var detail = log.Detail?.Replace("\n", " \\n ");
+                    writer.WriteLine($"{log.Id},{log.LogTime},{category},{detail}");
+                }
+                writer.Flush();
+
+                await database.RunInTransactionAsync(conn =>
+                {
+                    conn.Execute("DELETE FROM [Logs]");
+                    conn.Execute("DELETE FROM [sqlite_sequence] WHERE [name] = 'Logs'");
+                });
+                return file;
+            }
+            catch
+            {
+                return null;
+            }
+        }
+
+        private StoreHelper()
+        {
+            if (database == null)
+            {
+                try
+                {
+                    database = new SQLiteAsyncConnection(DatabasePath,
+                        SQLiteOpenFlags.ReadWrite |
+                        SQLiteOpenFlags.Create |
+                        SQLiteOpenFlags.SharedCache);
+                }
+                catch (Exception ex)
+                {
+                    Helper.Error("database.ctor.connect", ex);
+                }
+            }
+        }
+
+        public Task<List<T>> GetListAsync<T>(string query, params object[] args) where T : new()
+        {
+            try
+            {
+                return database.QueryAsync<T>(query, args);
+            }
+            catch (Exception ex)
+            {
+                Helper.Error("db.read", $"failed to read db, query: {string.Format(query, args)}, error: {ex.Message}");
             }
             return default;
         }
 
+        public Task<T> GetItemAsync<T>(int id) where T : IIdItem, new()
+        {
+            try
+            {
+                var source = new TaskCompletionSource<T>();
+                Task.Run(async () =>
+                {
+                    var item = await database.FindWithQueryAsync<T>($"SELECT * FROM [{typeof(T).Name}] WHERE [Id] = ? LIMIT 1", id);
+                    source.SetResult(item);
+                });
+                return source.Task;
+            }
+            catch (Exception ex)
+            {
+                Helper.Error("db.read", $"failed to get item, table: {typeof(T)}, id: {id}, error: {ex.Message}");
+            }
+            return default;
+        }
+
+        #region Helper
+
+        public Task<List<T>> GetListAsync<T>() where T : new()
+        {
+            try
+            {
+                return database.Table<T>().ToListAsync();
+            }
+            catch (Exception ex)
+            {
+                Helper.Error("db.read", $"failed to read db, error: {ex.Message}");
+            }
+            return default;
+        }
+
+        public Task<int> SaveItemAsync<T>(T item) where T : IIdItem
+        {
+            try
+            {
+                if (item.Id > 0)
+                {
+                    return database.UpdateAsync(item);
+                }
+                else
+                {
+                    return database.InsertAsync(item);
+                }
+            }
+            catch (Exception ex)
+            {
+                Helper.Error("db.write", $"failed to insert/update item, table: {typeof(T)}, id: {item.Id}, item: {item}, error: {ex.Message}");
+            }
+            return Task.FromResult(0);
+        }
+
+        public Task<int> DeleteItemAsync<T>(T item) where T : IIdItem
+        {
+            try
+            {
+                return database.DeleteAsync(item);
+            }
+            catch (Exception ex)
+            {
+                Helper.Error("db.delete", $"failed to delete item, table: {typeof(T)}, id: {item.Id}, item: {item}, error: {ex.Message}");
+            }
+            return Task.FromResult(0);
+        }
+
         #endregion
     }
 }

Billing.Shared/Themes/BaseTheme.cs

@@ -5,6 +5,8 @@ namespace Billing.Themes
 {
     public abstract class BaseTheme : ResourceDictionary
     {
+        public const double DefaultFontSize = 15.0;
+
         public static Color CurrentPrimaryColor => (Color)Application.Current.Resources[PrimaryColor];
         public static Color CurrentTextColor => (Color)Application.Current.Resources[TextColor];
         public static Color CurrentSecondaryTextColor => (Color)Application.Current.Resources[SecondaryTextColor];
@@ -31,9 +33,8 @@ namespace Billing.Themes
 
         protected void InitResources()
         {
-            var regularFontFamily = Definition.GetRegularFontFamily();
+            Add(FontSemiBold, Definition.SemiBoldFontFamily);
-            Add(FontSemiBold, Definition.GetSemiBoldFontFamily());
+            Add(FontBold, Definition.BoldFontFamily);
-            Add(FontBold, Definition.GetBoldFontFamily());
 
             Add(PrimaryColor, PrimaryMauiColor);
             Add(SecondaryColor, SecondaryMauiColor);
@@ -43,41 +44,49 @@ namespace Billing.Themes
             {
                 Setters =
                 {
-                    new Setter { Property = Label.FontSizeProperty, Value = Device.GetNamedSize(NamedSize.Small, typeof(Label)) },
+                    new Setter { Property = Label.FontSizeProperty, Value = DefaultFontSize },
                     new Setter { Property = Label.TextColorProperty, Value = PrimaryMauiColor },
-                    new Setter { Property = Label.FontFamilyProperty, Value = regularFontFamily }
+                    new Setter { Property = Label.FontFamilyProperty, Value = Definition.RegularFontFamily }
                 }
             });
             Add(new Style(typeof(OptionEntry))
             {
                 Setters =
                 {
-                    new Setter { Property = Entry.FontSizeProperty, Value = Device.GetNamedSize(NamedSize.Small, typeof(Entry)) },
+                    new Setter { Property = Entry.FontSizeProperty, Value = DefaultFontSize },
-                    new Setter { Property = Entry.FontFamilyProperty, Value = regularFontFamily }
+                    new Setter { Property = Entry.FontFamilyProperty, Value = Definition.RegularFontFamily }
                 }
             });
             Add(new Style(typeof(OptionEditor))
             {
                 Setters =
                 {
-                    new Setter { Property = Editor.FontSizeProperty, Value = Device.GetNamedSize(NamedSize.Small, typeof(Editor)) },
+                    new Setter { Property = Editor.FontSizeProperty, Value = DefaultFontSize },
-                    new Setter { Property = Editor.FontFamilyProperty, Value = regularFontFamily }
+                    new Setter { Property = Editor.FontFamilyProperty, Value = Definition.RegularFontFamily }
                 }
             });
             Add(new Style(typeof(OptionDatePicker))
             {
                 Setters =
                 {
-                    new Setter { Property = DatePicker.FontSizeProperty, Value = Device.GetNamedSize(NamedSize.Small, typeof(DatePicker)) },
+                    new Setter { Property = DatePicker.FontSizeProperty, Value = DefaultFontSize },
-                    new Setter { Property = DatePicker.FontFamilyProperty, Value = regularFontFamily }
+                    new Setter { Property = DatePicker.FontFamilyProperty, Value = Definition.RegularFontFamily }
                 }
             });
             Add(new Style(typeof(OptionTimePicker))
             {
                 Setters =
                 {
-                    new Setter { Property = TimePicker.FontSizeProperty, Value = Device.GetNamedSize(NamedSize.Small, typeof(TimePicker)) },
+                    new Setter { Property = TimePicker.FontSizeProperty, Value = DefaultFontSize },
-                    new Setter { Property = TimePicker.FontFamilyProperty, Value = regularFontFamily }
+                    new Setter { Property = TimePicker.FontFamilyProperty, Value = Definition.RegularFontFamily }
+                }
+            });
+            Add(new Style(typeof(OptionPicker))
+            {
+                Setters =
+                {
+                    new Setter { Property = Picker.FontSizeProperty, Value = DefaultFontSize },
+                    new Setter { Property = Picker.FontFamilyProperty, Value = Definition.RegularFontFamily }
                 }
             });
             Add(new Style(typeof(TintImage))

Billing.Shared/UI/BillingDate.xaml.cs

@@ -230,7 +230,7 @@ namespace Billing.UI
     {
         public static readonly BindableProperty DateProperty = Helper.Create<DateTime, BillingDay>(nameof(Date), propertyChanged: OnDatePropertyChanged);
         public static readonly BindableProperty TextProperty = Helper.Create<string, BillingDay>(nameof(Text));
-        public static readonly BindableProperty FontFamilyProperty = Helper.Create<string, BillingDay>(nameof(FontFamily), defaultValue: Definition.GetRegularFontFamily());
+        public static readonly BindableProperty FontFamilyProperty = Helper.Create<string, BillingDay>(nameof(FontFamily), defaultValue: Definition.RegularFontFamily);
         public static readonly BindableProperty IsSelectedProperty = Helper.Create<bool, BillingDay>(nameof(IsSelected), defaultValue: false);
         public static readonly BindableProperty OpacityProperty = Helper.Create<double, BillingDay>(nameof(Opacity), defaultValue: 1.0);
         public static readonly BindableProperty TextOpacityProperty = Helper.Create<double, BillingDay>(nameof(TextOpacity), defaultValue: 1.0);
@@ -273,11 +273,11 @@ namespace Billing.UI
             if (Helper.IsSameDay(date, selected))
             {
                 IsSelected = true;
-                SetValue(FontFamilyProperty, Definition.GetBoldFontFamily());
+                SetValue(FontFamilyProperty, Definition.BoldFontFamily);
             }
             else
             {
-                SetValue(FontFamilyProperty, Definition.GetRegularFontFamily());
+                SetValue(FontFamilyProperty, Definition.RegularFontFamily);
             }
             if (date.Year == selected.Year && date.Month == selected.Month)
             {

Billing.Shared/UI/BillingPage.cs

@@ -7,6 +7,9 @@ namespace Billing.UI
     public abstract class BillingPage : ContentPage
     {
         public event EventHandler Loaded;
+        public event EventHandler Refreshed;
+
+        private bool loaded;
 
         public BillingPage()
         {
@@ -14,9 +17,28 @@ namespace Billing.UI
             Shell.SetTabBarIsVisible(this, false);
         }
 
-        public virtual void OnLoaded()
+        protected virtual void OnLoaded()
         {
             Loaded?.Invoke(this, EventArgs.Empty);
         }
+
+        protected virtual void OnRefresh()
+        {
+            Refreshed?.Invoke(this, EventArgs.Empty);
+        }
+
+        public void TriggerLoad()
+        {
+            if (!loaded)
+            {
+                loaded = true;
+                OnLoaded();
+            }
+        }
+
+        public void TriggerRefresh()
+        {
+            OnRefresh();
+        }
     }
 }

Billing.Shared/UI/ColorPicker.cs

@@ -8,15 +8,19 @@ namespace Billing.UI
 {
     public class ColorPicker : SKCanvasView
     {
-        public static readonly BindableProperty ColorProperty = BindableProperty.Create(nameof(Color), typeof(Color), typeof(ColorPicker));
+        public static readonly BindableProperty ColorProperty = Helper.Create<Color, ColorPicker>(nameof(Color));
+        public static readonly BindableProperty CommandProperty = Helper.Create<Command, ColorPicker>(nameof(Command));
 
         public Color Color
         {
             get => (Color)GetValue(ColorProperty);
             set => SetValue(ColorProperty, value);
         }
-
+        public Command Command
-        public event EventHandler<Color> ColorChanged;
+        {
+            get => (Command)GetValue(CommandProperty);
+            set => SetValue(CommandProperty, value);
+        }
 
         private SKPoint? lastTouch;
 
@@ -116,7 +120,7 @@ namespace Billing.UI
 
                 var color = touchColor.ToFormsColor();
                 Color = color;
-                ColorChanged?.Invoke(this, color);
+                Command?.Execute(color);
             }
         }
 
@@ -126,8 +130,8 @@ namespace Billing.UI
             lastTouch = e.Location;
 
             var size = CanvasSize;
-            if ((e.Location.X > 0 && e.Location.X < size.Width) &&
+            if (e.Location.X > 0 && e.Location.X < size.Width &&
-                (e.Location.Y > 0 && e.Location.Y < size.Height))
+                e.Location.Y > 0 && e.Location.Y < size.Height)
             {
                 e.Handled = true;
                 InvalidateSurface();

Billing.Shared/UI/Converters.cs

@@ -205,13 +205,13 @@ namespace Billing.UI
                     {
                         if (!int.TryParse(key, NumberStyles.HexNumber, CultureInfo.InvariantCulture, out int i))
                         {
-                            return ImageSource.FromFile(BaseModel.ICON_DEFAULT);
+                            return ImageSource.FromFile(Definition.DefaultIcon);
                         }
                         glyph = char.ConvertFromUtf32(i);
                     }
                     return new FontImageSource
                     {
-                        FontFamily = Definition.GetBrandsFontFamily(),
+                        FontFamily = Definition.BrandsFontFamily,
                         Size = 20,
                         Glyph = glyph,
                         Color = Color.Black
@@ -244,4 +244,23 @@ namespace Billing.UI
             throw new NotImplementedException();
         }
     }
+
+    public class TintColorConverter : IValueConverter
+    {
+        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            if (value is long l)
+            {
+                return l.IsTransparent() ?
+                    BaseTheme.CurrentPrimaryColor :
+                    l.ToColor();
+            }
+            return Color.Transparent;
+        }
+
+        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+        {
+            throw new NotImplementedException();
+        }
+    }
 }

Billing.Shared/UI/CustomControl.cs

@@ -34,8 +34,8 @@ namespace Billing.UI
 
     public class LongPressGrid : Grid
     {
-        public static readonly BindableProperty LongCommandProperty = BindableProperty.Create(nameof(LongCommand), typeof(Command), typeof(LongPressGrid));
+        public static readonly BindableProperty LongCommandProperty = Helper.Create<Command, LongPressGrid>(nameof(LongCommand));
-        public static readonly BindableProperty LongCommandParameterProperty = BindableProperty.Create(nameof(LongCommandParameter), typeof(object), typeof(LongPressGrid));
+        public static readonly BindableProperty LongCommandParameterProperty = Helper.Create<object, LongPressGrid>(nameof(LongCommandParameter));
 
         public Command LongCommand
         {

Billing.Shared/UI/Definition.cs

@@ -1,22 +1,16 @@
 using System;
-using System.Collections.Generic;
-using System.IO;
 using System.Threading.Tasks;
-using System.Xml.Linq;
 using Billing.Languages;
-using Billing.Models;
 using Xamarin.Forms;
 
 namespace Billing.UI
 {
     public static partial class Definition
     {
-        public static string PrimaryColorKey = "PrimaryColor";
+        public const string SaveLocationKey = "SaveLocationKey";
-        public static partial (string main, long build) GetVersion();
+        public const string PrimaryColorKey = "PrimaryColor";
-        public static partial string GetRegularFontFamily();
+        public const string DefaultIcon = "ic_default";
-        public static partial string GetSemiBoldFontFamily();
+        public const long TransparentColor = 0x00ffffffL;
-        public static partial string GetBoldFontFamily();
-        public static partial string GetBrandsFontFamily();
     }
 
     public static class ExtensionHelper
@@ -92,50 +86,39 @@ namespace Billing.UI
             var result = await page.DisplayActionSheet(message, Resource.No, yes);
             return result == yes;
         }
-    }
 
-    public static class ModelExtensionHelper
+        public static DateTime LastMoment(this DateTime date)
-    {
-        public static List<T> FromStream<T>(Stream stream) where T : IModel, new()
         {
-            XDocument doc = XDocument.Load(stream);
+            // add 23:59:59.999...
-            var root = doc.Root;
+            return date.AddTicks(863999999999);
-            var list = new List<T>();
-            foreach (XElement ele in root.Elements("item"))
-            {
-                if (ele.Attribute("null")?.Value == "1")
-                {
-                    list.Add(default);
-                }
-                else
-                {
-                    T value = new();
-                    value.OnXmlDeserialize(ele);
-                    list.Add(value);
-                }
-            }
-            return list;
         }
 
-        public static void ToStream<T>(this IEnumerable<T> list, Stream stream) where T : IModel
+        public static bool IsTransparent(this long color)
         {
-            XElement root = new("root");
+            return (color & 0xff000000L) == 0x00000000L;
-            foreach (var t in list)
+        }
-            {
-                XElement item = new("item");
-                if (t == null)
-                {
-                    item.Add(new XAttribute("null", 1));
-                }
-                else
-                {
-                    t.OnXmlSerialize(item);
-                }
-                root.Add(item);
-            }
 
-            XDocument doc = new(new XDeclaration("1.0", "utf-8", "yes"), root);
+        public static Color ToColor(this long color)
-            doc.Save(stream, SaveOptions.DisableFormatting);
+        {
+            ulong c = (ulong)color;
+            int r = (int)(c & 0xff);
+            c >>= 8;
+            int g = (int)(c & 0xff);
+            c >>= 8;
+            int b = (int)(c & 0xff);
+            c >>= 8;
+            int a = (int)(c & 0xff);
+            return Color.FromRgba(r, g, b, a);
+        }
+
+        public static long ToLong(this Color color)
+        {
+            long l =
+                (uint)(color.A * 255) << 24 |
+                (uint)(color.B * 255) << 16 |
+                (uint)(color.G * 255) << 8 |
+                (uint)(color.R * 255);
+            return l;
         }
     }
 

Billing.Shared/UI/GroupStackLayout.cs

@@ -5,12 +5,12 @@ namespace Billing.UI
 {
     public class GroupStackLayout : Layout<View>
     {
-        public static readonly BindableProperty GroupHeaderTemplateProperty = BindableProperty.Create(nameof(GroupHeaderTemplate), typeof(DataTemplate), typeof(GroupStackLayout));
+        public static readonly BindableProperty GroupHeaderTemplateProperty = Helper.Create<DataTemplate, GroupStackLayout>(nameof(GroupHeaderTemplate));
-        public static readonly BindableProperty ItemTemplateProperty = BindableProperty.Create(nameof(ItemTemplate), typeof(DataTemplate), typeof(GroupStackLayout));
+        public static readonly BindableProperty ItemTemplateProperty = Helper.Create<DataTemplate, GroupStackLayout>(nameof(ItemTemplate));
-        public static readonly BindableProperty ItemsSourceProperty = BindableProperty.Create(nameof(ItemsSource), typeof(IList), typeof(GroupStackLayout), propertyChanged: OnItemsSourcePropertyChanged);
+        public static readonly BindableProperty ItemsSourceProperty = Helper.Create<IList, GroupStackLayout>(nameof(ItemsSource), propertyChanged: OnItemsSourcePropertyChanged);
-        public static readonly BindableProperty SpacingProperty = BindableProperty.Create(nameof(Spacing), typeof(double), typeof(GroupStackLayout), defaultValue: 4d);
+        public static readonly BindableProperty SpacingProperty = Helper.Create<double, GroupStackLayout>(nameof(Spacing), defaultValue: 4d);
-        public static readonly BindableProperty RowHeightProperty = BindableProperty.Create(nameof(RowHeight), typeof(double), typeof(GroupStackLayout), defaultValue: 32d);
+        public static readonly BindableProperty RowHeightProperty = Helper.Create<double, GroupStackLayout>(nameof(RowHeight), defaultValue: 32d);
-        public static readonly BindableProperty GroupHeightProperty = BindableProperty.Create(nameof(GroupHeight), typeof(double), typeof(GroupStackLayout), defaultValue: 24d);
+        public static readonly BindableProperty GroupHeightProperty = Helper.Create<double, GroupStackLayout>(nameof(GroupHeight), defaultValue: 24d);
 
         public DataTemplate GroupHeaderTemplate
         {
@@ -43,17 +43,16 @@ namespace Billing.UI
             set => SetValue(GroupHeightProperty, value);
         }
 
-        private static void OnItemsSourcePropertyChanged(BindableObject obj, object old, object @new)
+        private static void OnItemsSourcePropertyChanged(GroupStackLayout stack, IList old, IList list)
         {
-            var stack = (GroupStackLayout)obj;
             stack.lastWidth = -1;
-            if (@new == null)
+            if (list == null)
             {
                 //stack.cachedLayout.Clear();
                 stack.Children.Clear();
                 stack.InvalidateLayout();
             }
-            else if (@new is IList list)
+            else
             {
                 stack.freezed = true;
                 //stack.cachedLayout.Clear();

Billing.Shared/UI/OptionsCells.cs

@@ -4,16 +4,32 @@ using Xamarin.Forms;
 
 namespace Billing.UI
 {
+    public enum BorderStyle
+    {
+        None = 0,
+        RoundedRect
+    }
+
     public class OptionEntry : Entry { }
     public class OptionEditor : Editor { }
+    public class OptionPicker : Picker
+    {
+        public static readonly BindableProperty BorderStyleProperty = Helper.Create<BorderStyle, OptionPicker>(nameof(BorderStyle));
+
+        public BorderStyle BorderStyle
+        {
+            get => (BorderStyle)GetValue(BorderStyleProperty);
+            set => SetValue(BorderStyleProperty, value);
+        }
+    }
     public class OptionDatePicker : DatePicker { }
     public class OptionTimePicker : TimePicker { }
 
     public abstract class OptionCell : ViewCell
     {
-        public static readonly BindableProperty TitleProperty = BindableProperty.Create(nameof(Title), typeof(string), typeof(OptionCell));
+        public static readonly BindableProperty TitleProperty = Helper.Create<string, OptionCell>(nameof(Title));
-        public static readonly BindableProperty BackgroundColorProperty = BindableProperty.Create(nameof(BackgroundColor), typeof(Color), typeof(OptionCell));
+        public static readonly BindableProperty BackgroundColorProperty = Helper.Create<Color, OptionCell>(nameof(BackgroundColor));
-        public static readonly BindableProperty IconProperty = BindableProperty.Create(nameof(Icon), typeof(ImageSource), typeof(OptionCell));
+        public static readonly BindableProperty IconProperty = Helper.Create<ImageSource, OptionCell>(nameof(Icon));
 
         public string Title
         {
@@ -124,7 +140,7 @@ namespace Billing.UI
 
     public class OptionTextCell : OptionCell
     {
-        public static readonly BindableProperty DetailProperty = BindableProperty.Create(nameof(Detail), typeof(string), typeof(OptionTextCell));
+        public static readonly BindableProperty DetailProperty = Helper.Create<string, OptionTextCell>(nameof(Detail));
 
         public string Detail
         {
@@ -143,8 +159,8 @@ namespace Billing.UI
 
     public class OptionSelectCell : OptionTextCell
     {
-        public static readonly BindableProperty CommandProperty = BindableProperty.Create(nameof(Command), typeof(Command), typeof(OptionSelectCell));
+        public static readonly BindableProperty CommandProperty = Helper.Create<Command, OptionSelectCell>(nameof(Command));
-        public static readonly BindableProperty CommandParameterProperty = BindableProperty.Create(nameof(CommandParameter), typeof(object), typeof(OptionSelectCell));
+        public static readonly BindableProperty CommandParameterProperty = Helper.Create<object, OptionSelectCell>(nameof(CommandParameter));
 
         public Command Command
         {
@@ -189,8 +205,8 @@ namespace Billing.UI
 
     public class OptionImageCell : OptionSelectCell
     {
-        public static readonly BindableProperty ImageSourceProperty = BindableProperty.Create(nameof(ImageSource), typeof(ImageSource), typeof(OptionImageCell));
+        public static readonly BindableProperty ImageSourceProperty = Helper.Create<ImageSource, OptionImageCell>(nameof(ImageSource));
-        public static readonly BindableProperty TintColorProperty = BindableProperty.Create(nameof(TintColor), typeof(Color?), typeof(OptionImageCell));
+        public static readonly BindableProperty TintColorProperty = Helper.Create<Color?, OptionImageCell>(nameof(TintColor));
 
         [TypeConverter(typeof(ImageSourceConverter))]
         public ImageSource ImageSource
@@ -221,6 +237,13 @@ namespace Billing.UI
                 .Binding(Image.SourceProperty, nameof(ImageSource))
                 .Binding(TintHelper.TintColorProperty, nameof(TintColor)),
 
+                new Label
+                {
+                    VerticalOptions = LayoutOptions.Center
+                }
+                .Binding(Label.TextProperty, nameof(Detail))
+                .DynamicResource(Label.TextColorProperty, BaseTheme.SecondaryTextColor),
+
                 new TintImage
                 {
                     HeightRequest = 20,
@@ -240,7 +263,7 @@ namespace Billing.UI
 
     public class OptionSwitchCell : OptionCell
     {
-        public static readonly BindableProperty IsToggledProperty = BindableProperty.Create(nameof(IsToggled), typeof(bool), typeof(OptionSwitchCell));
+        public static readonly BindableProperty IsToggledProperty = Helper.Create<bool, OptionSwitchCell>(nameof(IsToggled));
 
         public bool IsToggled
         {
@@ -258,7 +281,7 @@ namespace Billing.UI
 
     public class OptionDatePickerCell : OptionCell
     {
-        public static readonly BindableProperty DateProperty = BindableProperty.Create(nameof(Date), typeof(DateTime), typeof(OptionDatePickerCell));
+        public static readonly BindableProperty DateProperty = Helper.Create<DateTime, OptionDatePickerCell>(nameof(Date));
 
         public DateTime Date
         {
@@ -278,7 +301,7 @@ namespace Billing.UI
 
     public class OptionTimePickerCell : OptionCell
     {
-        public static readonly BindableProperty TimeProperty = BindableProperty.Create(nameof(Time), typeof(TimeSpan), typeof(OptionTimePickerCell));
+        public static readonly BindableProperty TimeProperty = Helper.Create<TimeSpan, OptionTimePickerCell>(nameof(Time));
 
         public TimeSpan Time
         {
@@ -298,9 +321,9 @@ namespace Billing.UI
 
     public class OptionEntryCell : OptionCell
     {
-        public static readonly BindableProperty TextProperty = BindableProperty.Create(nameof(Text), typeof(string), typeof(OptionEntryCell));
+        public static readonly BindableProperty TextProperty = Helper.Create<string, OptionEntryCell>(nameof(Text));
-        public static readonly BindableProperty KeyboardProperty = BindableProperty.Create(nameof(Keyboard), typeof(Keyboard), typeof(OptionEntryCell));
+        public static readonly BindableProperty KeyboardProperty = Helper.Create<Keyboard, OptionEntryCell>(nameof(Keyboard), defaultValue: Keyboard.Default);
-        public static readonly BindableProperty PlaceholderProperty = BindableProperty.Create(nameof(Placeholder), typeof(string), typeof(OptionEntryCell));
+        public static readonly BindableProperty PlaceholderProperty = Helper.Create<string, OptionEntryCell>(nameof(Placeholder));
 
         public string Text
         {
@@ -351,10 +374,10 @@ namespace Billing.UI
 
     public class OptionEditorCell : OptionVerticalCell
     {
-        public static readonly BindableProperty TextProperty = BindableProperty.Create(nameof(Text), typeof(string), typeof(OptionEditorCell));
+        public static readonly BindableProperty TextProperty = Helper.Create<string, OptionEditorCell>(nameof(Text));
-        public static readonly BindableProperty FontSizeProperty = BindableProperty.Create(nameof(FontSize), typeof(double), typeof(OptionEditorCell), defaultValue: Device.GetNamedSize(NamedSize.Default, typeof(Editor)));
+        public static readonly BindableProperty FontSizeProperty = Helper.Create<double, OptionEditorCell>(nameof(FontSize), defaultValue: Device.GetNamedSize(NamedSize.Default, typeof(Editor)));
-        public static readonly BindableProperty KeyboardProperty = BindableProperty.Create(nameof(Keyboard), typeof(Keyboard), typeof(OptionEditorCell), defaultValue: Keyboard.Default);
+        public static readonly BindableProperty KeyboardProperty = Helper.Create<Keyboard, OptionEditorCell>(nameof(Keyboard), defaultValue: Keyboard.Default);
-        public static readonly BindableProperty PlaceholderProperty = BindableProperty.Create(nameof(Placeholder), typeof(string), typeof(OptionEditorCell));
+        public static readonly BindableProperty PlaceholderProperty = Helper.Create<string, OptionEditorCell>(nameof(Placeholder));
 
         public string Text
         {

Billing.Shared/UI/WrapLayout.cs

@@ -7,24 +7,23 @@ namespace Billing.UI
 {
     public class WrapLayout : Layout<View>
     {
-        public static readonly BindableProperty ItemsSourceProperty = BindableProperty.Create(nameof(ItemsSource), typeof(IList), typeof(WrapLayout), propertyChanged: OnItemsSourcePropertyChanged);
+        public static readonly BindableProperty ItemsSourceProperty = Helper.Create<IList, WrapLayout>(nameof(ItemsSource), propertyChanged: OnItemsSourcePropertyChanged);
-        public static readonly BindableProperty ColumnSpacingProperty = BindableProperty.Create(nameof(ColumnSpacing), typeof(double), typeof(WrapLayout), defaultValue: 4d, propertyChanged: (obj, _, _) => ((WrapLayout)obj).InvalidateLayout());
+        public static readonly BindableProperty ColumnSpacingProperty = Helper.Create<double, WrapLayout>(nameof(ColumnSpacing), defaultValue: 4d, propertyChanged: (layout, _, _) => layout.InvalidateLayout());
-        public static readonly BindableProperty RowSpacingProperty = BindableProperty.Create(nameof(RowSpacing), typeof(double), typeof(WrapLayout), defaultValue: 4d, propertyChanged: (obj, _, _) => ((WrapLayout)obj).InvalidateLayout());
+        public static readonly BindableProperty RowSpacingProperty = Helper.Create<double, WrapLayout>(nameof(RowSpacing), defaultValue: 4d, propertyChanged: (layout, _, _) => layout.InvalidateLayout());
 
-        private static void OnItemsSourcePropertyChanged(BindableObject obj, object old, object @new)
+        private static void OnItemsSourcePropertyChanged(WrapLayout layout, IList old, IList list)
         {
-            var itemTemplate = BindableLayout.GetItemTemplate(obj);
+            var itemTemplate = BindableLayout.GetItemTemplate(layout);
             if (itemTemplate == null)
             {
                 return;
             }
-            var layout = (WrapLayout)obj;
+            if (list == null)
-            if (@new == null)
             {
                 layout.Children.Clear();
                 layout.InvalidateLayout();
             }
-            else if (@new is IList list)
+            else
             {
                 layout.freezed = true;
                 layout.Children.Clear();

Billing.Shared/Views/AccountPage.xaml.cs

@@ -1,8 +1,8 @@
 using System.Collections.Generic;
 using System.Linq;
-using System.Threading.Tasks;
 using Billing.Languages;
 using Billing.Models;
+using Billing.Store;
 using Billing.UI;
 using Xamarin.Forms;
 
@@ -10,10 +10,10 @@ namespace Billing.Views
 {
     public partial class AccountPage : BillingPage
     {
-        private static readonly BindableProperty BalanceProperty = BindableProperty.Create(nameof(Balance), typeof(decimal), typeof(AccountPage));
+        private static readonly BindableProperty BalanceProperty = Helper.Create<decimal, AccountPage>(nameof(Balance));
-        private static readonly BindableProperty AssetProperty = BindableProperty.Create(nameof(Asset), typeof(decimal), typeof(AccountPage));
+        private static readonly BindableProperty AssetProperty = Helper.Create<decimal, AccountPage>(nameof(Asset));
-        private static readonly BindableProperty LiabilityProperty = BindableProperty.Create(nameof(Liability), typeof(decimal), typeof(AccountPage));
+        private static readonly BindableProperty LiabilityProperty = Helper.Create<decimal, AccountPage>(nameof(Liability));
-        private static readonly BindableProperty AccountsProperty = BindableProperty.Create(nameof(Accounts), typeof(List<AccountGrouping>), typeof(AccountPage));
+        private static readonly BindableProperty AccountsProperty = Helper.Create<List<AccountGrouping>, AccountPage>(nameof(Accounts));
 
         public decimal Balance => (decimal)GetValue(BalanceProperty);
         public decimal Asset => (decimal)GetValue(AssetProperty);
@@ -50,6 +50,17 @@ namespace Billing.Views
             groupLayout.Refresh(accounts);
         }
 
+        protected override void OnRefresh()
+        {
+            accounts.Clear();
+            foreach (var account in App.Accounts)
+            {
+                AddToAccountGroup(account);
+            }
+            RefreshBalance(true);
+            groupLayout.Refresh(accounts);
+        }
+
         private void RefreshBalance(bool calc = false)
         {
             if (calc)
@@ -64,17 +75,6 @@ namespace Billing.Views
 
         private void AddToAccountGroup(Account account)
         {
-            int maxId;
-            if (accounts.Count > 0)
-            {
-                maxId = accounts.Max(g => g.Max(a => a.Id));
-            }
-            else
-            {
-                maxId = -1;
-            }
-            account.Id = maxId + 1;
-
             var group = accounts.FirstOrDefault(g => g.Key == account.Category);
             if (group == null)
             {
@@ -120,25 +120,29 @@ namespace Billing.Views
                         if (group == null)
                         {
                             Helper.Error("account.delete", "unexpected deleting account, cannot find the current category");
-                            return;
+                        }
-                        }
+                        else
-                        group.Remove(account);
-                        if (group.Count == 0)
                         {
-                            accounts.Remove(group);
+                            group.Remove(account);
+                            if (group.Count == 0)
+                            {
+                                accounts.Remove(group);
+                            }
                         }
                         RefreshBalance();
                         groupLayout.Refresh(accounts);
+
+                        RankPage.Instance?.SetNeedRefresh();
 
-                        _ = Task.Run(App.WriteAccounts);
+                        await StoreHelper.DeleteAccountItemAsync(account);
                     }
                 }
             }
         }
 
-        private void AccountChecked(object sender, AccountEventArgs e)
+        private async void AccountChecked(object sender, AccountEventArgs e)
         {
-            var add = e.Account.Id < 0;
+            var add = e.Account.Id <= 0;
             if (add)
             {
                 App.Accounts.Add(e.Account);
@@ -147,7 +151,9 @@ namespace Billing.Views
             RefreshBalance(!add);
             groupLayout.Refresh(accounts);
 
-            Task.Run(App.WriteAccounts);
+            RankPage.Instance?.SetNeedRefresh();
+
+            await StoreHelper.SaveAccountItemAsync(e.Account);
         }
     }
 

Billing.Shared/Views/AddAccountPage.xaml.cs

@@ -9,11 +9,11 @@ namespace Billing.Views
 {
     public partial class AddAccountPage : BillingPage
     {
-        private static readonly BindableProperty AccountNameProperty = BindableProperty.Create(nameof(AccountName), typeof(string), typeof(AddAccountPage));
+        private static readonly BindableProperty AccountNameProperty = Helper.Create<string, AddAccountPage>(nameof(AccountName));
-        private static readonly BindableProperty AccountIconProperty = BindableProperty.Create(nameof(AccountIcon), typeof(string), typeof(AddAccountPage));
+        private static readonly BindableProperty AccountIconProperty = Helper.Create<string, AddAccountPage>(nameof(AccountIcon));
-        private static readonly BindableProperty CategoryProperty = BindableProperty.Create(nameof(Category), typeof(AccountCategory), typeof(AddAccountPage));
+        private static readonly BindableProperty CategoryProperty = Helper.Create<AccountCategory, AddAccountPage>(nameof(Category));
-        private static readonly BindableProperty InitialProperty = BindableProperty.Create(nameof(Initial), typeof(string), typeof(AddAccountPage));
+        private static readonly BindableProperty InitialProperty = Helper.Create<string, AddAccountPage>(nameof(Initial));
-        private static readonly BindableProperty MemoProperty = BindableProperty.Create(nameof(Memo), typeof(string), typeof(AddAccountPage));
+        private static readonly BindableProperty MemoProperty = Helper.Create<string, AddAccountPage>(nameof(Memo));
 
         public string AccountName
         {
@@ -59,7 +59,7 @@ namespace Billing.Views
             this.account = account;
             if (account == null)
             {
-                AccountIcon = BaseModel.ICON_DEFAULT;
+                AccountIcon = Definition.DefaultIcon;
                 Category = AccountCategory.Cash;
             }
             else
@@ -73,15 +73,9 @@ namespace Billing.Views
             InitializeComponent();
         }
 
-        private bool focused;
+        protected override void OnLoaded()
-
-        public override void OnLoaded()
         {
-            if (!focused)
+            editorName.SetFocus();
-            {
-                focused = true;
-                editorName.SetFocus();
-            }
         }
 
         private async void OnCheckAccount()
@@ -111,7 +105,6 @@ namespace Billing.Views
                 {
                     Account = account ?? new Account
                     {
-                        Id = -1,
                         Name = AccountName,
                         Icon = AccountIcon,
                         Category = Category,

Billing.Shared/Views/AddBillPage.xaml

@@ -10,9 +10,15 @@
                 BindingContext="{x:Reference billPage}">
 
     <ContentPage.ToolbarItems>
+        <ToolbarItem Order="Primary" IconImageSource="pin.png" Command="{Binding ViewLocation}"/>
         <ToolbarItem Order="Primary" IconImageSource="check.png" Command="{Binding CheckBill}"/>
     </ContentPage.ToolbarItems>
 
+    <ContentPage.Resources>
+        <ui:IconConverter x:Key="iconConverter"/>
+        <ui:TintColorConverter x:Key="tintColorConverter"/>
+    </ContentPage.Resources>
+
     <ContentPage.Content>
         <TableView Intent="Settings" HasUnevenRows="True">
             <TableSection Title=" ">
@@ -29,14 +35,18 @@
                                     Title="{r:Text Name}"
                                     Text="{Binding Name, Mode=TwoWay}"
                                     Placeholder="{r:Text NamePlaceholder}"/>
-                <ui:OptionSelectCell Height="44" Icon="project.png"
+                <ui:OptionImageCell Height="44" Icon="project.png"
-                                     Title="{r:Text Category}"
+                                    Title="{r:Text Category}"
-                                     Detail="{Binding CategoryName}"
+                                    Detail="{Binding Category.Name}"
-                                     Command="{Binding SelectCategory}"/>
+                                    ImageSource="{Binding Category.Icon, Converter={StaticResource iconConverter}}"
-                <ui:OptionSelectCell Height="44" Icon="wallet.png"
+                                    TintColor="{Binding Category.TintColor, Converter={StaticResource tintColorConverter}}"
-                                     Title="{r:Text Account}"
+                                    Command="{Binding SelectCategory}"/>
-                                     Detail="{Binding WalletName}"
+                <ui:OptionImageCell Height="44" Icon="wallet.png"
-                                     Command="{Binding SelectWallet}"/>
+                                    Title="{r:Text Account}"
+                                    Detail="{Binding Wallet.Name}"
+                                    ImageSource="{Binding Wallet.Icon, Converter={StaticResource iconConverter}}"
+                                    TintColor="{DynamicResource PrimaryColor}"
+                                    Command="{Binding SelectWallet}"/>
                 <ui:OptionEntryCell Height="44" Icon="online.png"
                                     Title="{r:Text Store}"
                                     Text="{Binding Store, Mode=TwoWay}"/>

Billing.Shared/Views/AddBillPage.xaml.cs

@@ -1,24 +1,31 @@
 using System;
 using System.Globalization;
 using System.Linq;
-using Billing.Languages;
+using System.Threading;
+using System.Threading.Tasks;
 using Billing.Models;
+using Billing.Store;
 using Billing.UI;
+using Xamarin.Essentials;
 using Xamarin.Forms;
+using Resource = Billing.Languages.Resource;
 
 namespace Billing.Views
 {
     public partial class AddBillPage : BillingPage
     {
-        private static readonly BindableProperty AmountProperty = BindableProperty.Create(nameof(Amount), typeof(string), typeof(AddBillPage));
+        private static readonly BindableProperty CheckBillProperty = Helper.Create<Command, AddBillPage>(nameof(CheckBill), defaultValue: new Command(() => { }, () => false));
-        private static readonly BindableProperty NameProperty = BindableProperty.Create(nameof(Name), typeof(string), typeof(AddBillPage));
+        private static readonly BindableProperty AmountProperty = Helper.Create<string, AddBillPage>(nameof(Amount));
-        private static readonly BindableProperty CategoryNameProperty = BindableProperty.Create(nameof(CategoryName), typeof(string), typeof(AddBillPage));
+        private static readonly BindableProperty NameProperty = Helper.Create<string, AddBillPage>(nameof(Name), defaultValue: string.Empty);
-        private static readonly BindableProperty WalletNameProperty = BindableProperty.Create(nameof(WalletName), typeof(string), typeof(AddBillPage));
+        private static readonly BindableProperty CategoryProperty = Helper.Create<Category, AddBillPage>(nameof(Category));
-        private static readonly BindableProperty StoreProperty = BindableProperty.Create(nameof(Store), typeof(string), typeof(AddBillPage));
+        private static readonly BindableProperty WalletProperty = Helper.Create<Account, AddBillPage>(nameof(Wallet));
-        private static readonly BindableProperty CreatedDateProperty = BindableProperty.Create(nameof(CreatedDate), typeof(DateTime), typeof(AddBillPage));
+        private static readonly BindableProperty StoreProperty = Helper.Create<string, AddBillPage>(nameof(Store));
-        private static readonly BindableProperty CreatedTimeProperty = BindableProperty.Create(nameof(CreatedTime), typeof(TimeSpan), typeof(AddBillPage));
+        private static readonly BindableProperty CreatedDateProperty = Helper.Create<DateTime, AddBillPage>(nameof(CreatedDate));
-        private static readonly BindableProperty NoteProperty = BindableProperty.Create(nameof(Note), typeof(string), typeof(AddBillPage));
+        private static readonly BindableProperty CreatedTimeProperty = Helper.Create<TimeSpan, AddBillPage>(nameof(CreatedTime));
+        private static readonly BindableProperty NoteProperty = Helper.Create<string, AddBillPage>(nameof(Note));
+        private static readonly BindableProperty ViewLocationProperty = Helper.Create<Command, AddBillPage>(nameof(ViewLocation), defaultValue: new Command(() => { }, () => false));
 
+        public Command CheckBill => (Command)GetValue(CheckBillProperty);
         public string Amount
         {
             get => (string)GetValue(AmountProperty);
@@ -29,8 +36,8 @@ namespace Billing.Views
             get => (string)GetValue(NameProperty);
             set => SetValue(NameProperty, value);
         }
-        public string CategoryName => (string)GetValue(CategoryNameProperty);
+        public Category Category => (Category)GetValue(CategoryProperty);
-        public string WalletName => (string)GetValue(WalletNameProperty);
+        public Account Wallet => (Account)GetValue(WalletProperty);
         public string Store
         {
             get => (string)GetValue(StoreProperty);
@@ -52,22 +59,23 @@ namespace Billing.Views
             set => SetValue(NoteProperty, value);
         }
 
-        public Command CheckBill { get; }
         public Command SelectCategory { get; }
         public Command SelectWallet { get; }
+        public Command ViewLocation => (Command)GetValue(ViewLocationProperty);
 
         public event EventHandler<Bill> BillChecked;
 
         private readonly Bill bill;
         private readonly DateTime createDate;
 
-        private int walletId;
+        private bool categoryChanged;
-        private int categoryId;
+        private CancellationTokenSource tokenSource;
+        private Location location;
 
+        public AddBillPage() : this(DateTime.Today) { }
         public AddBillPage(DateTime date)
         {
             createDate = date;
-            CheckBill = new Command(OnCheckBill);
             SelectCategory = new Command(OnSelectCategory);
             SelectWallet = new Command(OnSelectWallet);
             InitializeComponent();
@@ -79,25 +87,38 @@ namespace Billing.Views
         public AddBillPage(Bill bill)
         {
             this.bill = bill;
-            CheckBill = new Command(OnCheckBill);
             SelectCategory = new Command(OnSelectCategory);
-            SelectWallet = new Command(OnSelectWallet);
+            SelectWallet = new Command(OnSelectWallet);
+#if __IOS__
+            if (bill != null && bill.Latitude != null && bill.Longitude != null)
+            {
+                SetValue(ViewLocationProperty, new Command(OnViewLocation));
+            }
+#endif
             InitializeComponent();
             Title = Resource.EditBill;
 
             Initial();
         }
 
+        protected override void OnDisappearing()
+        {
+            if (tokenSource != null && !tokenSource.IsCancellationRequested)
+            {
+                tokenSource.Cancel();
+            }
+            base.OnDisappearing();
+        }
+
         private void Initial()
         {
             if (bill != null)
             {
                 Amount = Math.Abs(bill.Amount).ToString(CultureInfo.InvariantCulture);
                 Name = bill.Name;
-                walletId = bill.WalletId;
+                SetValue(WalletProperty, App.Accounts.FirstOrDefault(a => a.Id == bill.WalletId) ?? Account.Empty);
-                categoryId = bill.CategoryId;
+                SetValue(CategoryProperty, App.Categories.FirstOrDefault(c => c.Id == bill.CategoryId) ?? Category.Empty);
-                SetValue(WalletNameProperty, App.Accounts.FirstOrDefault(a => a.Id == walletId)?.Name);
+                categoryChanged = true;
-                SetValue(CategoryNameProperty, App.Categories.FirstOrDefault(c => c.Id == categoryId)?.Name);
                 Store = bill.Store;
                 CreatedDate = bill.CreateTime.Date;
                 CreatedTime = bill.CreateTime.TimeOfDay;
@@ -105,26 +126,59 @@ namespace Billing.Views
             }
             else
             {
-                var first = App.Accounts.First();
+                SetValue(WalletProperty, App.Accounts.FirstOrDefault() ?? Account.Empty);
-                walletId = first.Id;
+                SetValue(CategoryProperty, App.Categories.FirstOrDefault() ?? Category.Empty);
-                SetValue(WalletNameProperty, first.Name);
-                var firstCategory = App.Categories.First();
-                categoryId = firstCategory.Id;
-                SetValue(CategoryNameProperty, firstCategory.Name);
                 CreatedDate = createDate.Date;
                 CreatedTime = DateTime.Now.TimeOfDay;
             }
         }
 
-        private bool focused;
+        protected override void OnLoaded()
-
-        public override void OnLoaded()
         {
-            if (!focused)
+            if (bill == null)
             {
-                focused = true;
                 editorAmount.SetFocus();
             }
+            if (bill == null && App.SaveLocation)
+            {
+                _ = GetCurrentLocation();
+            }
+            else
+            {
+                SetValue(CheckBillProperty, new Command(OnCheckBill));
+            }
+        }
+
+        private async Task GetCurrentLocation()
+        {
+            try
+            {
+                var request = new GeolocationRequest(GeolocationAccuracy.Best, TimeSpan.FromSeconds(10));
+                tokenSource = new CancellationTokenSource();
+                var status = await Helper.CheckAndRequestPermissionAsync<Permissions.LocationWhenInUse>();
+                if (status != PermissionStatus.Granted)
+                {
+                    return;
+                }
+                location = await Geolocation.GetLocationAsync(request, tokenSource.Token);
+#if __IOS__
+                if (bill == null)
+                {
+                    SetValue(ViewLocationProperty, new Command(OnViewLocation));
+                }
+#endif
+            }
+            catch (FeatureNotSupportedException) { }
+            catch (FeatureNotEnabledException) { }
+            catch (PermissionException) { }
+            catch (Exception ex)
+            {
+                Helper.Error("location.get", ex);
+            }
+            finally
+            {
+                SetValue(CheckBillProperty, new Command(OnCheckBill));
+            }
         }
 
         private async void OnCheckBill()
@@ -144,8 +198,9 @@ namespace Billing.Views
                     await this.ShowMessage(Resource.AmountRequired);
                     return;
                 }
+                var category = Category;
+                var wallet = Wallet;
                 amount = Math.Abs(amount);
-                var category = App.Categories.FirstOrDefault(c => c.Id == categoryId);
                 if (category.Type == CategoryType.Spending)
                 {
                     amount *= -1;
@@ -156,27 +211,42 @@ namespace Billing.Views
                 {
                     name = category.Name;
                 }
-                if (bill != null)
+                Bill b = bill;
-                {
+                if (b == null)
-                    bill.Amount = amount;
+                {
-                    bill.Name = name;
+                    b = new Bill();
-                    bill.CategoryId = categoryId;
+                }
-                    bill.WalletId = walletId;
+                b.Amount = amount;
-                    bill.CreateTime = CreatedDate.Date.Add(CreatedTime);
+                b.Name = name;
-                    bill.Store = Store;
+                b.CategoryId = category.Id;
-                    bill.Note = Note;
+                b.WalletId = wallet.Id;
+                b.CreateTime = CreatedDate.Date.Add(CreatedTime);
+                b.Store = Store;
+                b.Note = Note;
+                if (location != null)
+                {
+                    b.Latitude = location.Latitude;
+                    b.Longitude = location.Longitude;
+                    b.Altitude = location.Altitude;
+                    b.Accuracy = location.Accuracy;
+                    b.IsGps = location.IsFromMockProvider;
+                }
+                BillChecked?.Invoke(this, b);
+
+                category.LastAccountId = wallet.Id;
+                category.LastUsed = DateTime.Now;
+
+                await StoreHelper.SaveCategoryItemAsync(category);
+
+                try
+                {
+                    HapticFeedback.Perform();
+                }
+                catch (FeatureNotSupportedException) { }
+                catch (Exception ex)
+                {
+                    Helper.Error("haptic.feedback", ex);
                 }
-                BillChecked?.Invoke(this, bill ?? new Bill
-                {
-                    Id = -1,
-                    Amount = amount,
-                    Name = name,
-                    CategoryId = categoryId,
-                    WalletId = walletId,
-                    CreateTime = CreatedDate.Date.Add(CreatedTime),
-                    Store = Store,
-                    Note = Note
-                });
             }
         }
 
@@ -188,7 +258,7 @@ namespace Billing.Views
             }
             using (Tap.Start())
             {
-                var page = new CategorySelectPage(categoryId);
+                var page = new CategorySelectPage(categoryChanged ? Category.Id : -1);
                 page.CategoryTapped += CategorySelectPage_Tapped;
                 await Navigation.PushAsync(page);
             }
@@ -196,8 +266,16 @@ namespace Billing.Views
 
         private void CategorySelectPage_Tapped(object sender, UICategory e)
         {
-            categoryId = e.Category.Id;
+            SetValue(CategoryProperty, e.Category);
-            SetValue(CategoryNameProperty, e.Name);
+            categoryChanged = true;
+            if (e.Category.LastAccountId != null)
+            {
+                var wallet = App.Accounts.FirstOrDefault(a => a.Id == e.Category.LastAccountId.Value);
+                if (wallet != null)
+                {
+                    SetValue(WalletProperty, wallet);
+                }
+            }
         }
 
         private async void OnSelectWallet()
@@ -208,22 +286,39 @@ namespace Billing.Views
             }
             using (Tap.Start())
             {
-                var source = App.Accounts.Select(a => new SelectItem<int>
+                var page = new ItemSelectPage<Account>(App.Accounts);
-                {
-                    Value = a.Id,
-                    Name = a.Name,
-                    Icon = a.Icon
-                });
-                var page = new ItemSelectPage<SelectItem<int>>(source);
                 page.ItemTapped += Wallet_ItemTapped;
                 await Navigation.PushAsync(page);
             }
         }
 
-        private void Wallet_ItemTapped(object sender, SelectItem<int> account)
+        private void Wallet_ItemTapped(object sender, Account account)
         {
-            walletId = account.Value;
+            SetValue(WalletProperty, account);
-            SetValue(WalletNameProperty, account.Name);
+        }
+
+        private async void OnViewLocation()
+        {
+            if (bill == null && location == null)
+            {
+                return;
+            }
+            if (Tap.IsBusy)
+            {
+                return;
+            }
+            using (Tap.Start())
+            {
+                var page = new ViewLocationPage(bill ?? new Bill
+                {
+                    Name = Name,
+                    Store = Store,
+                    Longitude = location.Longitude,
+                    Latitude = location.Latitude
+                });
+                page.Synced += (sender, loc) => location = loc;
+                await Navigation.PushAsync(page);
+            }
         }
     }
 }

Billing.Shared/Views/AddCategoryPage.xaml

@@ -41,7 +41,7 @@
                 <ViewCell Height="120">
                     <Grid BackgroundColor="{DynamicResource OptionTintColor}"
                           ColumnDefinitions=".35*, .65*" Padding="10">
-                        <ui:ColorPicker Grid.Column="1" ColorChanged="ColorPicker_ColorChanged"/>
+                        <ui:ColorPicker Grid.Column="1" Command="{Binding ColorPickerCommand}"/>
                     </Grid>
                 </ViewCell>
             </TableSection>

Billing.Shared/Views/AddCategoryPage.xaml.cs

@@ -10,10 +10,10 @@ namespace Billing.Views
 {
     public partial class AddCategoryPage : BillingPage
     {
-        private static readonly BindableProperty CategoryNameProperty = BindableProperty.Create(nameof(CategoryName), typeof(string), typeof(AddCategoryPage));
+        private static readonly BindableProperty CategoryNameProperty = Helper.Create<string, AddCategoryPage>(nameof(CategoryName));
-        private static readonly BindableProperty CategoryIconProperty = BindableProperty.Create(nameof(CategoryIcon), typeof(string), typeof(AddCategoryPage));
+        private static readonly BindableProperty CategoryIconProperty = Helper.Create<string, AddCategoryPage>(nameof(CategoryIcon));
-        private static readonly BindableProperty TintColorProperty = BindableProperty.Create(nameof(TintColor), typeof(Color), typeof(AddCategoryPage));
+        private static readonly BindableProperty TintColorProperty = Helper.Create<Color, AddCategoryPage>(nameof(TintColor));
-        private static readonly BindableProperty TintColorStringProperty = BindableProperty.Create(nameof(TintColorString), typeof(string), typeof(AddCategoryPage));
+        private static readonly BindableProperty TintColorStringProperty = Helper.Create<string, AddCategoryPage>(nameof(TintColorString));
 
         public string CategoryName
         {
@@ -38,6 +38,7 @@ namespace Billing.Views
 
         public Command CheckCategory { get; }
         public Command SelectIcon { get; }
+        public Command ColorPickerCommand { get; }
 
         public event EventHandler<Category> CategoryChecked;
 
@@ -55,14 +56,13 @@ namespace Billing.Views
             {
                 CategoryName = category.Name;
                 CategoryIcon = category.Icon;
-                if (category.TintColor == Color.Transparent ||
+                if (category.TintColor.IsTransparent())
-                    category.TintColor == default)
                 {
                     TintColor = BaseTheme.CurrentPrimaryColor;
                 }
                 else
                 {
-                    TintColor = category.TintColor;
+                    TintColor = category.TintColor.ToColor();
                 }
             }
             else
@@ -73,25 +73,23 @@ namespace Billing.Views
 
             CheckCategory = new Command(OnCheckCategory);
             SelectIcon = new Command(OnSelectIcon);
+            ColorPickerCommand = new Command(OnColorPickerCommand);
 
             InitializeComponent();
         }
 
-        private bool focused;
+        protected override void OnLoaded()
-
-        public override void OnLoaded()
         {
-            if (!focused)
+            editorName.SetFocus();
-            {
-                focused = true;
-                editorName.SetFocus();
-            }
         }
 
-        private void ColorPicker_ColorChanged(object sender, Color e)
+        private void OnColorPickerCommand(object o)
         {
-            TintColor = e;
+            if (o is Color color)
-            TintColorString = Helper.WrapColorString(e.ToHex());
+            {
+                TintColor = color;
+                TintColorString = Helper.WrapColorString(color.ToHex());
+            }
         }
 
         private async void OnCheckCategory()
@@ -104,15 +102,15 @@ namespace Billing.Views
             {
                 var currentColor = BaseTheme.CurrentPrimaryColor;
                 var tintColor = TintColor;
+                var color = (tintColor == currentColor ? Color.Transparent : tintColor).ToLong();
                 var category = App.Categories.FirstOrDefault(c => c.Id == categoryId);
                 if (category == null)
                 {
                     CategoryChecked?.Invoke(this, new Category
                     {
-                        Id = -1,
                         Name = CategoryName,
                         Icon = CategoryIcon,
-                        TintColor = tintColor == currentColor ? Color.Transparent : tintColor,
+                        TintColor = color,
                         ParentId = parent?.Id,
                         Type = parent?.Type ?? CategoryType.Spending
                     });
@@ -121,7 +119,7 @@ namespace Billing.Views
                 {
                     category.Name = CategoryName;
                     category.Icon = CategoryIcon;
-                    category.TintColor = tintColor == currentColor ? Color.Transparent : tintColor;
+                    category.TintColor = color;
                     CategoryChecked?.Invoke(this, category);
                 }
                 await Navigation.PopAsync();

Billing.Shared/Views/BillPage.xaml

@@ -20,6 +20,7 @@
         <ui:BalanceColorConverter x:Key="colorConverter"/>
         <ui:TimeConverter x:Key="timeConverter"/>
         <ui:IconConverter x:Key="iconConverter"/>
+        <ui:TintColorConverter x:Key="tintColorConverter"/>
     </ContentPage.Resources>
 
     <Shell.TitleView>
@@ -31,13 +32,8 @@
                               VerticalOptions="Center" LongCommand="{Binding TitleLongPressed}">
                 <Label Text="{Binding SelectedDate, Converter={StaticResource titleDateConverter}}"
                        TextColor="{DynamicResource PrimaryColor}"
-                       FontSize="{OnPlatform Android=20, iOS=18}">
+                       FontFamily="{x:Static ui:Definition.SemiBoldFontFamily}"
-                    <Label.FontFamily>
+                       FontSize="{OnPlatform Android=20, iOS=18}"/>
-                        <OnPlatform x:TypeArguments="x:String"
-                                    Android="OpenSans-SemiBold.ttf#OpenSans-SemiBold"
-                                    iOS="OpenSans-Bold"/>
-                    </Label.FontFamily>
-                </Label>
             </ui:LongPressGrid>
             <ui:TintImageButton Source="calendar.png" WidthRequest="20" HeightRequest="20"
                                 VerticalOptions="Center" HorizontalOptions="Start"
@@ -101,6 +97,7 @@
                                                       CommandParameter="{Binding .}"/>
                             </Grid.GestureRecognizers>
                             <ui:TintImage Source="{Binding Icon, Converter={StaticResource iconConverter}}"
+                                          ui:TintHelper.TintColor="{Binding TintColor, Converter={StaticResource tintColorConverter}}"
                                           WidthRequest="26" HeightRequest="20" VerticalOptions="Center"/>
                             <Label Grid.Column="1" Text="{Binding Name}" TextColor="{DynamicResource TextColor}"
                                    VerticalOptions="Center"

Billing.Shared/Views/BillPage.xaml.cs

@@ -1,4 +1,5 @@
 using Billing.Models;
+using Billing.Store;
 using Billing.UI;
 using System;
 using System.Collections.Generic;
@@ -44,8 +45,6 @@ namespace Billing.Views
         public Command EditBilling { get; }
         public Command DeleteBilling { get; }
 
-        private bool initialized;
-
         public BillPage()
         {
             TitleDateTap = new Command(OnTitleDateTapped);
@@ -56,26 +55,26 @@ namespace Billing.Views
             InitializeComponent();
         }
 
-        public override void OnLoaded()
+        protected override void OnLoaded()
         {
-            if (!initialized)
+            billingDate.SetDateTime(DateTime.Today);
+        }
+
+        protected override void OnRefresh()
+        {
+            Task.Run(() =>
             {
-                initialized = true;
+                var bills = App.Bills.Where(b => Helper.IsSameDay(b.CreateTime, SelectedDate));
-                billingDate.SetDateTime(DateTime.Today);
+                Bills = new List<UIBill>(bills.OrderBy(b => b.CreateTime).Select(b => Helper.WrapBill(b)));
-            }
+                RefreshBalance(Bills);
+                MainThread.BeginInvokeOnMainThread(async () => await scrollView.ScrollToAsync(0, 0, true));
+            });
         }
 
         private void OnDateSelected(object sender, DateEventArgs e)
         {
             SelectedDate = e.Date;
-
+            OnRefresh();
-            Task.Run(() =>
-            {
-                var bills = App.Bills.Where(b => Helper.IsSameDay(b.CreateTime, e.Date));
-                Bills = new List<UIBill>(bills.OrderBy(b => b.CreateTime).Select(b => Helper.WrapBill(b)));
-                RefreshBalance(Bills);
-                MainThread.BeginInvokeOnMainThread(async () => await scrollView.ScrollToAsync(0, 0, true));
-            });
         }
 
         private void RefreshBalance(List<UIBill> bills)
@@ -90,7 +89,9 @@ namespace Billing.Views
 
         private void UpdateBill(UIBill bill)
         {
-            bill.Icon = App.Categories.FirstOrDefault(c => c.Id == bill.Bill.CategoryId)?.Icon ?? BaseModel.ICON_DEFAULT;
+            var category = App.Categories.FirstOrDefault(c => c.Id == bill.Bill.CategoryId);
+            bill.Icon = category?.Icon ?? Definition.DefaultIcon;
+            bill.TintColor = category?.TintColor ?? Definition.TransparentColor;
             bill.Name = bill.Bill.Name;
             bill.DateCreation = bill.Bill.CreateTime;
             bill.Amount = bill.Bill.Amount;
@@ -113,6 +114,16 @@ namespace Billing.Views
         private void OnTitleDateLongPressed()
         {
             billingDate.SetDateTime(DateTime.Today);
+
+            try
+            {
+                HapticFeedback.Perform();
+            }
+            catch (FeatureNotSupportedException) { }
+            catch (Exception ex)
+            {
+                Helper.Error("haptic.feedback", ex);
+            }
         }
 
         private async void OnEditBilling(object o)
@@ -161,27 +172,19 @@ namespace Billing.Views
                         App.Bills.Remove(bill.Bill);
                         billsLayout.Refresh(bills);
                         RefreshBalance(bills);
+
+                        RankPage.Instance?.SetNeedRefresh();
 
-                        _ = Task.Run(App.WriteBills);
+                        await StoreHelper.DeleteBillItemAsync(bill.Bill);
                     }
                 }
             }
         }
 
-        private void OnBillChecked(object sender, Bill e)
+        private async void OnBillChecked(object sender, Bill e)
         {
-            if (e.Id < 0)
+            if (e.Id <= 0)
             {
-                int maxId;
-                if (App.Bills.Count > 0)
-                {
-                    maxId = App.Bills.Max(b => b.Id);
-                }
-                else
-                {
-                    maxId = -1;
-                }
-                e.Id = maxId + 1;
                 App.Bills.Add(e);
                 var bills = Bills;
                 bills.Add(Helper.WrapBill(e));
@@ -192,28 +195,50 @@ namespace Billing.Views
                 var bill = Bills.FirstOrDefault(b => b.Bill == e);
                 if (bill != null)
                 {
-                    UpdateBill(bill);
+                    if (bill.DateCreation != e.CreateTime)
+                    {
+                        var bills = App.Bills.Where(b => Helper.IsSameDay(b.CreateTime, SelectedDate));
+                        Bills = new List<UIBill>(bills.OrderBy(b => b.CreateTime).Select(b => Helper.WrapBill(b)));
+                        RefreshBalance(Bills);
+
+                        RankPage.Instance?.SetNeedRefresh();
+
+                        await StoreHelper.SaveBillItemAsync(e);
+                        return;
+                    }
+                    else
+                    {
+                        UpdateBill(bill);
+                    }
                 }
             }
             RefreshBalance(Bills);
 
-            Task.Run(App.WriteBills);
+            RankPage.Instance?.SetNeedRefresh();
+
+            await StoreHelper.SaveBillItemAsync(e);
         }
     }
 
     public class UIBill : BindableObject
     {
-        public static readonly BindableProperty IconProperty = BindableProperty.Create(nameof(Icon), typeof(string), typeof(UIBill));
+        public static readonly BindableProperty IconProperty = Helper.Create<string, UIBill>(nameof(Icon));
-        public static readonly BindableProperty NameProperty = BindableProperty.Create(nameof(Name), typeof(string), typeof(UIBill));
+        public static readonly BindableProperty TintColorProperty = Helper.Create<long, UIBill>(nameof(TintColor));
-        public static readonly BindableProperty DateCreationProperty = BindableProperty.Create(nameof(DateCreation), typeof(DateTime), typeof(UIBill));
+        public static readonly BindableProperty NameProperty = Helper.Create<string, UIBill>(nameof(Name));
-        public static readonly BindableProperty AmountProperty = BindableProperty.Create(nameof(Amount), typeof(decimal), typeof(UIBill));
+        public static readonly BindableProperty DateCreationProperty = Helper.Create<DateTime, UIBill>(nameof(DateCreation));
-        public static readonly BindableProperty WalletProperty = BindableProperty.Create(nameof(Wallet), typeof(string), typeof(UIBill));
+        public static readonly BindableProperty AmountProperty = Helper.Create<decimal, UIBill>(nameof(Amount));
+        public static readonly BindableProperty WalletProperty = Helper.Create<string, UIBill>(nameof(Wallet));
 
         public string Icon
         {
             get => (string)GetValue(IconProperty);
             set => SetValue(IconProperty, value);
         }
+        public long TintColor
+        {
+            get => (long)GetValue(TintColorProperty);
+            set => SetValue(TintColorProperty, value);
+        }
         public string Name
         {
             get => (string)GetValue(NameProperty);

Billing.Shared/Views/CategoryPage.xaml

@@ -10,6 +10,7 @@
 
     <ContentPage.Resources>
         <ui:IconConverter x:Key="iconConverter"/>
+        <ui:TintColorConverter x:Key="tintColorConverter"/>
     </ContentPage.Resources>
 
     <ScrollView>
@@ -32,7 +33,7 @@
                                                   CommandParameter="{Binding .}"/>
                         </Grid.GestureRecognizers>
                         <ui:TintImage Source="{Binding Icon, Converter={StaticResource iconConverter}}"
-                                      ui:TintHelper.TintColor="{Binding TintColor}"
+                                      ui:TintHelper.TintColor="{Binding TintColor, Converter={StaticResource tintColorConverter}}"
                                       WidthRequest="26" HeightRequest="20" VerticalOptions="Center"/>
                         <Label Grid.Column="1" Text="{Binding Name}" TextColor="{DynamicResource TextColor}"
                                HorizontalOptions="FillAndExpand" VerticalOptions="Center"

Billing.Shared/Views/CategoryPage.xaml.cs

@@ -1,19 +1,18 @@
 using Billing.Languages;
 using Billing.Models;
-using Billing.Themes;
+using Billing.Store;
 using Billing.UI;
 using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
-using System.Threading.Tasks;
 using Xamarin.Forms;
 
 namespace Billing.Views
 {
     public partial class CategoryPage : BillingPage
     {
-        private static readonly BindableProperty CategoriesProperty = BindableProperty.Create(nameof(Categories), typeof(IList), typeof(CategoryPage));
+        private static readonly BindableProperty CategoriesProperty = Helper.Create<IList, CategoryPage>(nameof(Categories));
-        private static readonly BindableProperty IsTopCategoryProperty = BindableProperty.Create(nameof(IsTopCategory), typeof(bool), typeof(CategoryPage));
+        private static readonly BindableProperty IsTopCategoryProperty = Helper.Create<bool, CategoryPage>(nameof(IsTopCategory));
 
         public IList Categories
         {
@@ -68,9 +67,7 @@ namespace Billing.Views
                 Icon = category.Icon,
                 Name = category.Name,
                 IsTopCategory = IsTopCategory,
-                TintColor = category.TintColor == Color.Transparent || category.TintColor == default ?
+                TintColor = category.TintColor
-                    BaseTheme.CurrentPrimaryColor :
-                    category.TintColor
             };
         }
 
@@ -112,7 +109,7 @@ namespace Billing.Views
                             Categories.Remove(c);
                             groupLayout.Refresh(Categories);
                             App.Categories.Remove(c.Category);
-                            _ = Task.Run(App.WriteCategories);
+                            await StoreHelper.DeleteCategoryItemAsync(c.Category);
                         }
                     }
                 }
@@ -144,21 +141,11 @@ namespace Billing.Views
             }
         }
 
-        private void OnCategoryChecked(object sender, Category category)
+        private async void OnCategoryChecked(object sender, Category category)
         {
-            if (category.Id < 0)
+            if (category.Id <= 0)
             {
                 // add
-                int maxId;
-                if (App.Categories.Count > 0)
-                {
-                    maxId = App.Categories.Max(b => b.Id);
-                }
-                else
-                {
-                    maxId = -1;
-                }
-                category.Id = maxId + 1;
                 App.Categories.Add(category);
                 Categories.Add(WrapCategory(category));
             }
@@ -183,26 +170,24 @@ namespace Billing.Views
             }
             groupLayout.Refresh(Categories);
 
-            Task.Run(App.WriteCategories);
+            await StoreHelper.SaveCategoryItemAsync(category);
         }
 
         private void UpdateCategory(UICategory c)
         {
             c.Name = c.Category.Name;
             c.Icon = c.Category.Icon;
-            c.TintColor = c.Category.TintColor == Color.Transparent || c.Category.TintColor == default ?
+            c.TintColor = c.Category.TintColor;
-                BaseTheme.CurrentPrimaryColor :
-                c.Category.TintColor;
         }
     }
 
     public class UICategory : BindableObject
     {
-        public static readonly BindableProperty IsCheckedProperty = BindableProperty.Create(nameof(IsChecked), typeof(bool), typeof(UICategory));
+        public static readonly BindableProperty IsCheckedProperty = Helper.Create<bool, UICategory>(nameof(IsChecked));
-        public static readonly BindableProperty IconProperty = BindableProperty.Create(nameof(Icon), typeof(string), typeof(UICategory));
+        public static readonly BindableProperty IconProperty = Helper.Create<string, UICategory>(nameof(Icon));
-        public static readonly BindableProperty NameProperty = BindableProperty.Create(nameof(Name), typeof(string), typeof(UICategory));
+        public static readonly BindableProperty NameProperty = Helper.Create<string, UICategory>(nameof(Name));
-        public static readonly BindableProperty TintColorProperty = BindableProperty.Create(nameof(TintColor), typeof(Color), typeof(UICategory));
+        public static readonly BindableProperty TintColorProperty = Helper.Create<long, UICategory>(nameof(TintColor));
-        public static readonly BindableProperty IsTopCategoryProperty = BindableProperty.Create(nameof(IsTopCategory), typeof(bool), typeof(UICategory));
+        public static readonly BindableProperty IsTopCategoryProperty = Helper.Create<bool, UICategory>(nameof(IsTopCategory));
 
         public bool IsChecked
         {
@@ -219,9 +204,9 @@ namespace Billing.Views
             get => (string)GetValue(NameProperty);
             set => SetValue(NameProperty, value);
         }
-        public Color TintColor
+        public long TintColor
         {
-            get => (Color)GetValue(TintColorProperty);
+            get => (long)GetValue(TintColorProperty);
             set => SetValue(TintColorProperty, value);
         }
         public bool IsTopCategory
@@ -242,6 +227,10 @@ namespace Billing.Views
     {
         public string Key { get; }
 
+        public CategoryGrouping(string key) : base()
+        {
+            Key = key;
+        }
         public CategoryGrouping(string key, IEnumerable<UICategory> categories) : base(categories)
         {
             Key = key;

Billing.Shared/Views/CategorySelectPage.xaml

@@ -13,6 +13,7 @@
     <ContentPage.Resources>
         <ui:IconConverter x:Key="iconConverter"/>
         <ui:SelectBackgroundColorConverter x:Key="backgroundConverter"/>
+        <ui:TintColorConverter x:Key="tintColorConverter"/>
     </ContentPage.Resources>
 
     <Grid ColumnDefinitions=".5*, .5*">
@@ -36,7 +37,7 @@
                                                       CommandParameter="{Binding .}"/>
                             </Grid.GestureRecognizers>
                             <ui:TintImage Source="{Binding Icon, Converter={StaticResource iconConverter}}"
-                                          ui:TintHelper.TintColor="{Binding TintColor}"
+                                          ui:TintHelper.TintColor="{Binding TintColor, Converter={StaticResource tintColorConverter}}"
                                           WidthRequest="26" HeightRequest="20" VerticalOptions="Center"/>
                             <Label Grid.Column="1" Text="{Binding Name}" TextColor="{DynamicResource TextColor}"
                                    HorizontalOptions="FillAndExpand" VerticalOptions="Center"
@@ -58,7 +59,7 @@
                                                       CommandParameter="{Binding .}"/>
                             </Grid.GestureRecognizers>
                             <ui:TintImage Source="{Binding Icon, Converter={StaticResource iconConverter}}"
-                                          ui:TintHelper.TintColor="{Binding TintColor}"
+                                          ui:TintHelper.TintColor="{Binding TintColor, Converter={StaticResource tintColorConverter}}"
                                           WidthRequest="26" HeightRequest="20" VerticalOptions="Center"/>
                             <Label Grid.Column="1" Text="{Binding Name}" TextColor="{DynamicResource TextColor}"
                                    HorizontalOptions="FillAndExpand" VerticalOptions="Center"

Billing.Shared/Views/CategorySelectPage.xaml.cs

@@ -1,6 +1,5 @@
 using Billing.Languages;
 using Billing.Models;
-using Billing.Themes;
 using Billing.UI;
 using System;
 using System.Collections.Generic;
@@ -11,8 +10,8 @@ namespace Billing.Views
 {
     public partial class CategorySelectPage : BillingPage
     {
-        private static readonly BindableProperty TopCategoriesProperty = BindableProperty.Create(nameof(TopCategories), typeof(List<CategoryGrouping>), typeof(CategorySelectPage));
+        private static readonly BindableProperty TopCategoriesProperty = Helper.Create<List<CategoryGrouping>, CategorySelectPage>(nameof(TopCategories));
-        private static readonly BindableProperty SubCategoriesProperty = BindableProperty.Create(nameof(SubCategories), typeof(List<UICategory>), typeof(CategorySelectPage));
+        private static readonly BindableProperty SubCategoriesProperty = Helper.Create<List<UICategory>, CategorySelectPage>(nameof(SubCategories));
 
         public List<CategoryGrouping> TopCategories
         {
@@ -31,12 +30,10 @@ namespace Billing.Views
         public event EventHandler<UICategory> CategoryTapped;
 
         private readonly int categoryId;
-        private readonly Color defaultColor;
 
         public CategorySelectPage(int id)
         {
             categoryId = id;
-            defaultColor = BaseTheme.CurrentPrimaryColor;
             TapTopCategory = new Command(OnTopCategoryTapped);
             TapSubCategory = new Command(OnSubCategoryTapped);
 
@@ -45,6 +42,22 @@ namespace Billing.Views
                 new(Resource.Spending, App.Categories.Where(c => c.Type == CategoryType.Spending && c.ParentId == null).Select(c => WrapCategory(c))),
                 new(Resource.Income, App.Categories.Where(c => c.Type == CategoryType.Income && c.ParentId == null).Select(c => WrapCategory(c)))
             };
+            UICategory last;
+            if (App.Categories.Any(c => c.LastUsed != null))
+            {
+                last = new UICategory(null)
+                {
+                    IsChecked = true,
+                    Icon = "rank",
+                    Name = Resource.LastSelected,
+                    TintColor = Definition.TransparentColor
+                };
+                TopCategories.Insert(0, new(Resource.Recent) { last });
+            }
+            else
+            {
+                last = null;
+            }
 
             UICategory cat;
             var category = App.Categories.FirstOrDefault(c => c.Id == categoryId);
@@ -58,7 +71,7 @@ namespace Billing.Views
             }
             else
             {
-                cat = TopCategories.SelectMany(g => g).FirstOrDefault(c => c.Category.Id == category.ParentId);
+                cat = TopCategories.SelectMany(g => g).FirstOrDefault(c => c.Category?.Id == category.ParentId) ?? last;
             }
             DoRefreshSubCategories(cat);
 
@@ -72,7 +85,7 @@ namespace Billing.Views
                 IsChecked = c.Id == categoryId,
                 Icon = c.Icon,
                 Name = c.Name,
-                TintColor = c.TintColor == Color.Transparent || c.TintColor == default ? defaultColor : c.TintColor
+                TintColor = c.TintColor
             };
         }
 
@@ -83,7 +96,18 @@ namespace Billing.Views
             {
                 m.IsChecked = m == category;
             }
-            SubCategories = App.Categories.Where(c => c.ParentId == category.Category.Id).Select(c => WrapCategory(c)).ToList();
+            if (category == null)
+            {
+                return;
+            }
+            if (category.Category == null)
+            {
+                SubCategories = App.Categories.Where(c => c.ParentId != null && c.LastUsed != null).OrderByDescending(c => c.LastUsed).Take(10).Select(c => WrapCategory(c)).ToList();
+            }
+            else
+            {
+                SubCategories = App.Categories.Where(c => c.ParentId == category.Category.Id).Select(c => WrapCategory(c)).ToList();
+            }
         }
 
         private async void OnTopCategoryTapped(object o)
@@ -97,7 +121,7 @@ namespace Billing.Views
                 if (o is UICategory category)
                 {
                     DoRefreshSubCategories(category);
-                    if (SubCategories.Count == 0)
+                    if (SubCategories?.Count == 0)
                     {
                         CategoryTapped?.Invoke(this, category);
                         await Navigation.PopAsync();

Billing.Shared/Views/IconSelectPage.xaml.cs

@@ -1,5 +1,4 @@
-using Billing.Models;
+using Billing.UI;
-using Billing.UI;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -9,7 +8,7 @@ namespace Billing.Views
 {
     public partial class IconSelectPage : BillingPage
     {
-        public static readonly BindableProperty IconsSourceProperty = BindableProperty.Create(nameof(IconsSource), typeof(IList<BillingIcon>), typeof(IconSelectPage));
+        public static readonly BindableProperty IconsSourceProperty = Helper.Create<IList<BillingIcon>, IconSelectPage>(nameof(IconsSource));
 
         public IList<BillingIcon> IconsSource
         {
@@ -37,7 +36,7 @@ namespace Billing.Views
         {
             var source = new List<BillingIcon>
             {
-                new() { Icon = BaseModel.ICON_DEFAULT },
+                new() { Icon = Definition.DefaultIcon },
                 new() { Icon = "wallet" },
                 new() { Icon = "dollar" },
                 new() { Icon = "creditcard" },
@@ -67,6 +66,7 @@ namespace Billing.Views
                 new() { Icon = "taxi" },
                 new() { Icon = "fitness" },
                 new() { Icon = "party" },
+                new() { Icon = "share" },
             };
             source.AddRange(IconConverter.IconPreset.Select(icon => new BillingIcon { Icon = $"#brand#{icon.Key}" }));
             foreach (var icon in source)
@@ -103,7 +103,7 @@ namespace Billing.Views
 
     public class BillingIcon : BindableObject
     {
-        public static readonly BindableProperty IsCheckedProperty = BindableProperty.Create(nameof(IsChecked), typeof(bool), typeof(BillingIcon));
+        public static readonly BindableProperty IsCheckedProperty = Helper.Create<bool, BillingIcon>(nameof(IsChecked));
 
         public bool IsChecked
         {

Billing.Shared/Views/RankPage.xaml

@@ -4,6 +4,7 @@
                 xmlns:ui="clr-namespace:Billing.UI"
                 xmlns:v="clr-namespace:Billing.Views"
                 xmlns:chart="clr-namespace:Microcharts.Forms;assembly=Microcharts.Forms"
+                xmlns:ios="clr-namespace:Xamarin.Forms.PlatformConfiguration.iOSSpecific;assembly=Xamarin.Forms.Core"
                 xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
                 x:Class="Billing.Views.RankPage"
                 x:Name="rankPage"
@@ -12,31 +13,29 @@
                 Shell.TabBarIsVisible="True">
 
     <Shell.TitleView>
-        <Grid>
+        <Grid ColumnSpacing="10" ColumnDefinitions="30, *, 30">
-            <StackLayout Margin="30, 0, 0, 0" HorizontalOptions="Center" VerticalOptions="Center"
+            <ui:TintImageButton Source="left.png" WidthRequest="20" HeightRequest="20"
-                         Orientation="Horizontal" Spacing="10">
+                                VerticalOptions="Center" HorizontalOptions="Center"
-                <ui:TintImageButton Source="left.png" WidthRequest="20" HeightRequest="20"
+                                Command="{Binding LeftCommand}"/>
-                                    VerticalOptions="Center" HorizontalOptions="Start"
+            <Label Grid.Column="1" Text="{Binding Title}"
-                                    Command="{Binding LeftCommand}"/>
+                   TextColor="{DynamicResource PrimaryColor}"
-                <Label Text="{Binding Title}"
+                   FontSize="{OnPlatform Android=20, iOS=18}"
-                       TextColor="{DynamicResource PrimaryColor}"
+                   FontFamily="{x:Static ui:Definition.SemiBoldFontFamily}"
-                       FontSize="{OnPlatform Android=20, iOS=18}">
+                   VerticalOptions="Center"
-                    <Label.FontFamily>
+                   HorizontalOptions="Center">
-                        <OnPlatform x:TypeArguments="x:String"
+                <Label.GestureRecognizers>
-                                    Android="OpenSans-SemiBold.ttf#OpenSans-SemiBold"
+                    <TapGestureRecognizer Command="{Binding FilterCommand}"/>
-                                    iOS="OpenSans-Bold"/>
+                </Label.GestureRecognizers>
-                    </Label.FontFamily>
+            </Label>
-                </Label>
+            <ui:TintImageButton Grid.Column="2" Source="right.png" WidthRequest="20" HeightRequest="20"
-                <ui:TintImageButton Source="right.png" WidthRequest="20" HeightRequest="20"
+                                VerticalOptions="Center" HorizontalOptions="Center"
-                                    VerticalOptions="Center" HorizontalOptions="End"
+                                Command="{Binding RightCommand}"/>
-                                    Command="{Binding RightCommand}"/>
-            </StackLayout>
         </Grid>
     </Shell.TitleView>
 
-    <ContentPage.ToolbarItems>
+    <!--<ContentPage.ToolbarItems>
         <ToolbarItem Order="Primary" IconImageSource="filter.png" Command="{Binding FilterCommand}"/>
-    </ContentPage.ToolbarItems>
+    </ContentPage.ToolbarItems>-->
 
     <ContentPage.Resources>
         <ui:NegativeConverter x:Key="negativeConverter"/>
@@ -45,10 +44,11 @@
         <ui:BalanceColorConverter x:Key="colorConverter"/>
         <ui:TimeConverter x:Key="timeConverter" IncludeDate="True"/>
         <ui:IconConverter x:Key="iconConverter"/>
+        <ui:TintColorConverter x:Key="tintColorConverter"/>
         <Style x:Key="titleLabel" TargetType="Label">
             <Setter Property="FontSize" Value="16"/>
             <Setter Property="Margin" Value="10, 20, 10, 10"/>
-            <!--<Setter Property="TextColor" Value="{DynamicResource SecondaryTextColor}"/>-->
+            <Setter Property="TextColor" Value="{DynamicResource TextColor}"/>
         </Style>
         <Style x:Key="promptLabel" TargetType="Label">
             <Setter Property="HeightRequest" Value="240"/>
@@ -58,12 +58,16 @@
             <Setter Property="VerticalTextAlignment" Value="Center"/>
             <Setter Property="TextColor" Value="{DynamicResource SecondaryTextColor}"/>
         </Style>
+        <Style TargetType="Button">
+            <Setter Property="TextColor" Value="{DynamicResource TextColor}"/>
+            <Setter Property="FontSize" Value="14"/>
+        </Style>
     </ContentPage.Resources>
 
     <Grid>
-        <ScrollView x:Name="scroller">
+        <ScrollView x:Name="scroller" Scrolled="Scroller_Scrolled">
             <StackLayout>
-                <Grid Margin="0, 10, 0, 0" Padding="8" ColumnSpacing="8" ColumnDefinitions="*, Auto" HeightRequest="24"
+                <Grid Padding="8" ColumnSpacing="8" ColumnDefinitions="*, Auto" HeightRequest="24"
                       BackgroundColor="{DynamicResource PromptBackgroundColor}">
                     <StackLayout Grid.Column="1" Orientation="Horizontal" Spacing="6">
                         <Label Text="{r:Text Income}" TextColor="{DynamicResource GreenColor}"
@@ -108,6 +112,7 @@
                                                           CommandParameter="{Binding .}"/>
                                 </Grid.GestureRecognizers>
                                 <ui:TintImage Source="{Binding Icon, Converter={StaticResource iconConverter}}"
+                                              ui:TintHelper.TintColor="{Binding TintColor, Converter={StaticResource tintColorConverter}}"
                                               WidthRequest="26" HeightRequest="20" VerticalOptions="Center"/>
                                 <Label Grid.Column="1" Text="{Binding Name}" TextColor="{DynamicResource TextColor}"
                                        VerticalOptions="Center"
@@ -133,8 +138,8 @@
         <ui:BlurryPanel x:Name="panelFilter" VerticalOptions="Start" Opacity="0"
                         BackgroundColor="{DynamicResource WindowBackgroundColor}"
                         HeightRequest="{Binding Height, Source={x:Reference gridFilter}}"/>
-        <Grid x:Name="gridFilter" VerticalOptions="Start" Opacity="0" Padding="10">
+        <Grid x:Name="gridFilter" VerticalOptions="Start" Opacity="0" RowDefinitions="Auto, Auto, Auto, Auto">
-            <ui:SegmentedControl Margin="6, 6, 6, 3" VerticalOptions="Center"
+            <ui:SegmentedControl VerticalOptions="Center" Margin="10, 10, 10, 3"
                                  SelectedSegmentIndex="{Binding SegmentType, Mode=TwoWay}"
                                  SelectedTextColor="{DynamicResource TextColor}"
                                  TintColor="{DynamicResource PromptBackgroundColor}">
@@ -143,6 +148,26 @@
                     <ui:SegmentedControlOption Text="{r:Text Income}"/>
                 </ui:SegmentedControl.Children>
             </ui:SegmentedControl>
+            <ui:OptionPicker Grid.Row="1" VerticalOptions="Center" Margin="10, 3"
+                             HorizontalTextAlignment="Center" FontSize="16"
+                             ItemsSource="{Binding DateTypes}"
+                             SelectedIndex="{Binding SegmentDate, Mode=TwoWay}"
+                             TextColor="{DynamicResource TextColor}"
+                             ios:Picker.UpdateMode="WhenFinished"/>
+            <Grid Grid.Row="2" ColumnDefinitions="*, Auto, *" Margin="10, 3">
+                <ui:OptionDatePicker Date="{Binding StartPickerDate, Mode=TwoWay}"
+                                     FontSize="16" TextColor="{DynamicResource TextColor}"
+                                     VerticalOptions="Center"
+                                     ios:DatePicker.UpdateMode="WhenFinished"/>
+                <Label Grid.Column="1" Text="{r:Text To}" TextColor="{DynamicResource SecondaryTextColor}"
+                       VerticalOptions="Center"/>
+                <ui:OptionDatePicker Grid.Column="2" Date="{Binding EndPickerDate, Mode=TwoWay}"
+                                     FontSize="16" TextColor="{DynamicResource TextColor}"
+                                     VerticalOptions="Center"
+                                     ios:DatePicker.UpdateMode="WhenFinished"/>
+            </Grid>
+            <Grid Grid.Row="3" HeightRequest="1" BackgroundColor="{DynamicResource PromptBackgroundColor}"
+                  IsVisible="{OnPlatform iOS=False}"/>
         </Grid>
     </Grid>
 </ui:BillingPage>

Billing.Shared/Views/RankPage.xaml.cs

@@ -1,4 +1,5 @@
 using Billing.Models;
+using Billing.Store;
 using Billing.Themes;
 using Billing.UI;
 using Microcharts;
@@ -14,9 +15,39 @@ using Resource = Billing.Languages.Resource;
 
 namespace Billing.Views
 {
+    public enum DateType : int
+    {
+        Custom = 0,
+        Monthly,
+        Today,
+        PastMonth,
+        PastQuarter,
+        PastSixMonths,
+        PastYear,
+        Total
+    }
+
     public partial class RankPage : BillingPage
     {
+        private static RankPage instance;
+        public static RankPage Instance => instance;
+
+        private static readonly DateTime today = DateTime.Today;
+
         private static readonly BindableProperty SegmentTypeProperty = Helper.Create<int, RankPage>(nameof(SegmentType), defaultValue: 0, propertyChanged: OnSegmentTypeChanged);
+        private static readonly BindableProperty SegmentDateProperty = Helper.Create<int, RankPage>(nameof(SegmentDate), defaultValue: 1, propertyChanged: OnSegmentDateChanged);
+        private static readonly BindableProperty StartDateProperty = Helper.Create<DateTime, RankPage>(nameof(StartDate),
+            defaultValue: today.AddDays(1 - today.Day),
+            propertyChanged: OnDateChanged);
+        private static readonly BindableProperty EndDateProperty = Helper.Create<DateTime, RankPage>(nameof(EndDate),
+            defaultValue: today.AddDays(DateTime.DaysInMonth(today.Year, today.Month) - today.Day).LastMoment(),
+            propertyChanged: OnDateChanged);
+        private static readonly BindableProperty StartPickerDateProperty = Helper.Create<DateTime, RankPage>(nameof(StartPickerDate),
+            defaultValue: today.AddDays(1 - today.Day),
+            propertyChanged: OnPickerStartDateChanged);
+        private static readonly BindableProperty EndPickerDateProperty = Helper.Create<DateTime, RankPage>(nameof(EndPickerDate),
+            defaultValue: today.AddDays(DateTime.DaysInMonth(today.Year, today.Month) - today.Day),
+            propertyChanged: OnPickerEndDateChanged);
         private static readonly BindableProperty ChartProperty = Helper.Create<Chart, RankPage>(nameof(Chart));
         private static readonly BindableProperty CategoryChartProperty = Helper.Create<Chart, RankPage>(nameof(CategoryChart));
         private static readonly BindableProperty TopBillsProperty = Helper.Create<IList<UIBill>, RankPage>(nameof(TopBills));
@@ -34,8 +65,40 @@ namespace Billing.Views
                 1 => CategoryType.Income,
                 _ => CategoryType.Spending
             };
-            page.OnFilterCommand(false);
+            page.LoadData();
-            page.SetMonth(page.current);
+        }
+        private static void OnSegmentDateChanged(RankPage page, int old, int @new)
+        {
+            page.OnDateTypeCommand((DateType)@new);
+        }
+        private static void OnDateChanged(RankPage page, DateTime old = default, DateTime @new = default)
+        {
+            page.isLocked = true;
+            page.StartPickerDate = page.StartDate.Date;
+            page.EndPickerDate = page.EndDate.Date;
+            page.isLocked = false;
+            if (!page.isFreezed)
+            {
+                var format = Resource.TitleShortDateFormat;
+                page.Title = page.StartDate.ToString(format) + " ~ " + page.EndDate.ToString(format);
+                page.LoadData();
+            }
+        }
+        private static void OnPickerStartDateChanged(RankPage page, DateTime _, DateTime @new)
+        {
+            if (!page.isLocked)
+            {
+                page.SegmentDate = 0;
+                page.StartDate = @new.Date;
+            }
+        }
+        private static void OnPickerEndDateChanged(RankPage page, DateTime _, DateTime @new)
+        {
+            if (!page.isLocked)
+            {
+                page.SegmentDate = 0;
+                page.EndDate = @new.Date.LastMoment();
+            }
         }
 
         public int SegmentType
@@ -43,6 +106,31 @@ namespace Billing.Views
             get => (int)GetValue(SegmentTypeProperty);
             set => SetValue(SegmentTypeProperty, value);
         }
+        public int SegmentDate
+        {
+            get => (int)GetValue(SegmentDateProperty);
+            set => SetValue(SegmentDateProperty, value);
+        }
+        public DateTime StartDate
+        {
+            get => (DateTime)GetValue(StartDateProperty);
+            set => SetValue(StartDateProperty, value);
+        }
+        public DateTime EndDate
+        {
+            get => (DateTime)GetValue(EndDateProperty);
+            set => SetValue(EndDateProperty, value);
+        }
+        public DateTime StartPickerDate
+        {
+            get => (DateTime)GetValue(StartPickerDateProperty);
+            set => SetValue(StartPickerDateProperty, value);
+        }
+        public DateTime EndPickerDate
+        {
+            get => (DateTime)GetValue(EndPickerDateProperty);
+            set => SetValue(EndPickerDateProperty, value);
+        }
         public Chart Chart
         {
             get => (Chart)GetValue(ChartProperty);
@@ -77,59 +165,262 @@ namespace Billing.Views
         public decimal Spending => (decimal)GetValue(SpendingProperty);
         public decimal Balance => (decimal)GetValue(BalanceProperty);
 
+        public List<string> DateTypes { get; }
+
         public Command LeftCommand { get; }
         public Command RightCommand { get; }
         public Command FilterCommand { get; }
         public Command EditBilling { get; }
 
-        private DateTime current;
-        private DateTime end;
         private IEnumerable<Bill> bills;
         private CategoryType type = CategoryType.Spending;
         private bool isFilterToggled;
+        private bool isFreezed;
+        private bool isLocked;
+        private bool needRefresh = true;
 
+        private const int FILTER_HEIGHT = 100;
         private readonly SKTypeface font;
 
         public RankPage()
         {
+            instance = this;
+
             LeftCommand = new Command(OnLeftCommand);
             RightCommand = new Command(OnRightCommand);
             FilterCommand = new Command(OnFilterCommand);
-            EditBilling = new Command(OnEditBilling);
+            EditBilling = new Command(OnEditBilling);
-
+
-            var style = SKFontManager.Default.GetFontStyles("PingFang SC");
+#if __IOS__
+            var style = SKFontManager.Default.GetFontStyles("PingFang SC");
             if (style != null)
             {
                 font = style.CreateTypeface(SKFontStyle.Normal);
             }
+            else
+#endif
+                font = SKFontManager.Default.MatchCharacter(0x4e00);
+
+            DateTypes = new List<string>
+            {
+                Resource.Custom,
+                Resource.Monthly,
+                Resource.Today,
+                Resource.PastMonth,
+                Resource.PastQuarter,
+                Resource.PastSixMonths,
+                Resource.PastYear,
+                Resource.Total
+            };
 
             InitializeComponent();
 
-            gridFilter.TranslationY = -60;
+            gridFilter.TranslationY = -FILTER_HEIGHT;
-            panelFilter.TranslationY = -60;
+            panelFilter.TranslationY = -FILTER_HEIGHT;
         }
 
-        public override void OnLoaded()
+        public void SetNeedRefresh()
         {
-            SetMonth(DateTime.Today);
+            needRefresh = true;
+        }
+
+        protected override void OnAppearing()
+        {
+            if (needRefresh)
+            {
+                needRefresh = false;
+                OnDateChanged(this);
+            }
+        }
+
+        protected override void OnRefresh()
+        {
+            OnDateChanged(this);
+        }
+
+        private void OnDateTypeCommand(DateType index)
+        {
+            if (index < DateType.Monthly || index > DateType.Total)
+            {
+                return;
+            }
+            if (scroller.ScrollY > 0)
+            {
+                scroller.ScrollToAsync(0, 0, true);
+            }
+            isFreezed = true;
+            var today = DateTime.Today;
+            switch (index)
+            {
+                case DateType.Monthly:
+                    StartDate = today.AddDays(1 - today.Day);
+                    EndDate = today.AddDays(DateTime.DaysInMonth(today.Year, today.Month) - today.Day).LastMoment();
+                    break;
+                case DateType.Today:
+                    StartDate = today;
+                    EndDate = today.LastMoment();
+                    break;
+                case DateType.PastMonth:
+                    StartDate = today.AddMonths(-1).AddDays(1);
+                    EndDate = today.LastMoment();
+                    break;
+                case DateType.PastQuarter:
+                    StartDate = today.AddMonths(-3).AddDays(1);
+                    EndDate = today.LastMoment();
+                    break;
+                case DateType.PastSixMonths:
+                    StartDate = today.AddMonths(-6).AddDays(1);
+                    EndDate = today.LastMoment();
+                    break;
+                case DateType.PastYear:
+                    StartDate = today.AddYears(-1).AddDays(1);
+                    EndDate = today.LastMoment();
+                    break;
+                case DateType.Total:
+                    //StartDate = App.Bills.Min(b => b.CreateTime).Date;
+                    //EndDate = App.Bills.Max(b => b.CreateTime).Date.LastMoment();
+                    DateTime min = DateTime.MaxValue;
+                    DateTime max = DateTime.MinValue;
+                    App.Bills.ForEach(b =>
+                    {
+                        if (b.CreateTime < min)
+                        {
+                            min = b.CreateTime;
+                        }
+                        if (b.CreateTime > max)
+                        {
+                            max = b.CreateTime;
+                        }
+                    });
+                    if (min == DateTime.MaxValue && max == DateTime.MinValue)
+                    {
+                        return;
+                    }
+                    StartDate = min.Date;
+                    EndDate = max.Date.LastMoment();
+                    break;
+            }
+            isFreezed = false;
+            OnDateChanged(this);
+        }
+
+        private bool IsPreset(DateTime start, DateTime end)
+        {
+            return start.Month == end.Month &&
+                start.Day == 1 &&
+                end.Day == DateTime.DaysInMonth(end.Year, end.Month);
         }
 
         private void OnLeftCommand()
         {
+            var type = (DateType)SegmentDate;
+            if (type < DateType.Monthly || type >= DateType.Total)
+            {
+                return;
+            }
             if (scroller.ScrollY > 0)
             {
                 scroller.ScrollToAsync(0, 0, true);
             }
-            SetMonth(current.AddMonths(-1));
+            isFreezed = true;
+            var start = StartDate;
+            var end = EndDate;
+            if (type == DateType.Monthly || IsPreset(start, end))
+            {
+                start = start.AddMonths(-1);
+                end = start.AddDays(DateTime.DaysInMonth(start.Year, start.Month) - 1).LastMoment();
+            }
+            else if (type == DateType.PastMonth)
+            {
+                start = start.AddMonths(-1);
+                end = end.AddMonths(-1);
+            }
+            else if (type == DateType.PastQuarter)
+            {
+                start = start.AddMonths(-3);
+                end = end.AddMonths(-3);
+            }
+            else if (type == DateType.PastSixMonths)
+            {
+                start = start.AddMonths(-6);
+                end = end.AddMonths(-6);
+            }
+            else if (type == DateType.PastYear)
+            {
+                start = start.AddYears(-1);
+                end = end.AddYears(-1);
+            }
+            else
+            {
+                var days = (end.Date - start.Date).TotalDays + 1;
+                start = start.AddDays(-days);
+                end = end.AddDays(-days);
+            }
+            if (start.Year < 1900)
+            {
+                isFreezed = false;
+                return;
+            }
+            StartDate = start;
+            EndDate = end;
+            isFreezed = false;
+            OnDateChanged(this);
         }
 
         private void OnRightCommand()
         {
+            var type = (DateType)SegmentDate;
+            if (type < DateType.Monthly || type >= DateType.Total)
+            {
+                return;
+            }
             if (scroller.ScrollY > 0)
             {
                 scroller.ScrollToAsync(0, 0, true);
             }
-            SetMonth(current.AddMonths(1));
+            isFreezed = true;
+            var start = StartDate;
+            var end = EndDate;
+            if (type == DateType.Monthly || IsPreset(start, end))
+            {
+                start = start.AddMonths(1);
+                end = start.AddDays(DateTime.DaysInMonth(start.Year, start.Month) - 1).LastMoment();
+            }
+            else if (type == DateType.PastMonth)
+            {
+                start = start.AddMonths(1);
+                end = end.AddMonths(1);
+            }
+            else if (type == DateType.PastQuarter)
+            {
+                start = start.AddMonths(3);
+                end = end.AddMonths(3);
+            }
+            else if (type == DateType.PastSixMonths)
+            {
+                start = start.AddMonths(6);
+                end = end.AddMonths(6);
+            }
+            else if (type == DateType.PastYear)
+            {
+                start = start.AddYears(1);
+                end = end.AddYears(1);
+            }
+            else
+            {
+                var days = (end.Date - start.Date).TotalDays + 1;
+                start = start.AddDays(days);
+                end = end.AddDays(days);
+            }
+            if (end.Year > DateTime.Today.Year + 100)
+            {
+                isFreezed = false;
+                return;
+            }
+            StartDate = start;
+            EndDate = end;
+            isFreezed = false;
+            OnDateChanged(this);
         }
 
         private async void OnFilterCommand(object o)
@@ -146,6 +437,7 @@ namespace Billing.Views
             ViewExtensions.CancelAnimations(panelFilter);
             if (isFilterToggled)
             {
+                await scroller.ScrollToAsync(scroller.ScrollX, scroller.ScrollY, false);
                 await Task.WhenAll(
                     gridFilter.TranslateTo(0, 0, easing: Easing.CubicOut),
                     gridFilter.FadeTo(1, easing: Easing.CubicOut),
@@ -155,9 +447,9 @@ namespace Billing.Views
             else
             {
                 await Task.WhenAll(
-                    gridFilter.TranslateTo(0, -60, easing: Easing.CubicIn),
+                    gridFilter.TranslateTo(0, -FILTER_HEIGHT, easing: Easing.CubicIn),
                     gridFilter.FadeTo(0, easing: Easing.CubicIn),
-                    panelFilter.TranslateTo(0, -60, easing: Easing.CubicIn),
+                    panelFilter.TranslateTo(0, -FILTER_HEIGHT, easing: Easing.CubicIn),
                     panelFilter.FadeTo(0, easing: Easing.CubicIn));
             }
         }
@@ -179,18 +471,9 @@ namespace Billing.Views
             }
         }
 
-        private void UpdateBill(UIBill bill)
+        private async void RefreshBalance(DateTime start, DateTime end)
-        {
-            bill.Icon = App.Categories.FirstOrDefault(c => c.Id == bill.Bill.CategoryId)?.Icon ?? BaseModel.ICON_DEFAULT;
-            bill.Name = bill.Bill.Name;
-            bill.DateCreation = bill.Bill.CreateTime;
-            bill.Amount = bill.Bill.Amount;
-            bill.Wallet = App.Accounts.FirstOrDefault(a => a.Id == bill.Bill.WalletId)?.Name;
-        }
-
-        private async void RefreshBalance()
         {
-            var bills = await Task.Run(() => App.Bills.Where(b => b.CreateTime >= current && b.CreateTime <= end));
+            var bills = await Task.Run(() => App.Bills.Where(b => b.CreateTime >= start && b.CreateTime <= end));
             var income = bills.Where(b => b.Amount > 0).Sum(b => b.Amount);
             var spending = -bills.Where(b => b.Amount < 0).Sum(b => b.Amount);
             SetValue(IncomeProperty, income);
@@ -198,43 +481,33 @@ namespace Billing.Views
             SetValue(BalanceProperty, income - spending);
         }
 
-        private void OnBillChecked(object sender, Bill e)
+        private async void OnBillChecked(object sender, Bill e)
         {
-            var bill = TopBills.FirstOrDefault(b => b.Bill == e);
+            await StoreHelper.SaveBillItemAsync(e);
-            if (bill != null)
+            LoadData();
-            {
-                UpdateBill(bill);
-            }
-            RefreshBalance();
-
-            Task.Run(App.WriteBills);
         }
 
-        private async void SetMonth(DateTime date)
+        private async void LoadData()
         {
-            current = date.AddDays(1 - date.Day);
+            var start = StartDate;
-            end = current.AddDays(DateTime.DaysInMonth(current.Year, current.Month));
+            var end = EndDate;
-
-            var format = Resource.DateRangeFormat;
-            Title = current.ToString(format) + " ~ " + end.AddDays(-1).ToString(format);
-
             var spending = type == CategoryType.Spending;
-            bills = await Task.Run(() => App.Bills.Where(b => (b.Amount > 0 ^ spending) && b.CreateTime >= current && b.CreateTime <= end));
+            bills = await Task.Run(() => App.Bills.Where(b => (b.Amount > 0 ^ spending) && b.CreateTime >= start && b.CreateTime <= end));
 
             var primaryColor = BaseTheme.CurrentPrimaryColor.ToSKColor();
             var textColor = BaseTheme.CurrentSecondaryTextColor.ToSKColor();
 
-            _ = Task.Run(() => LoadReportChart(primaryColor, textColor));
+            _ = Task.Run(() => LoadReportChart(primaryColor, textColor, start, end));
             _ = Task.Run(() => LoadCategoryChart(primaryColor, textColor));
             _ = Task.Run(LoadTopBills);
 
-            RefreshBalance();
+            RefreshBalance(start, end);
         }
 
-        private void LoadReportChart(SKColor primaryColor, SKColor textColor)
+        private void LoadReportChart(SKColor primaryColor, SKColor textColor, DateTime start, DateTime end)
         {
             var entries = new List<ChartEntry>();
-            for (var day = current; day <= end; day = day.AddDays(1))
+            for (var day = start; day <= end; day = day.AddDays(1))
             {
                 var daybills = bills.Where(b => Helper.IsSameDay(b.CreateTime, day));
                 decimal amount = Math.Abs(daybills.Sum(b => b.Amount));
@@ -350,5 +623,13 @@ namespace Billing.Views
                 }
             });
         }
+
+        private void Scroller_Scrolled(object sender, ScrolledEventArgs e)
+        {
+            if (isFilterToggled)
+            {
+                OnFilterCommand(false);
+            }
+        }
     }
 }

Billing.Shared/Views/SettingPage.xaml

@@ -11,18 +11,24 @@
                 BindingContext="{x:Reference settingPage}"
                 Shell.TabBarIsVisible="True">
 
+    <ContentPage.ToolbarItems>
+        <ToolbarItem Order="Primary" IconImageSource="share.png" Command="{Binding ShareCommand}"/>
+    </ContentPage.ToolbarItems>
+
     <TableView Intent="Settings" HasUnevenRows="True">
         <TableSection Title="{r:Text About}">
-            <ui:OptionTextCell Height="36" Title="{r:Text Version}"
+            <ui:OptionTextCell Height="44" Title="{r:Text Version}"
                                Detail="{Binding Version}"/>
         </TableSection>
         <TableSection Title="{r:Text Feature}">
-            <ui:OptionSelectCell Height="36" Title="{r:Text CategoryManage}"
+            <ui:OptionSelectCell Height="44" Title="{r:Text CategoryManage}"
                                  Detail="{r:Text Detail}"
                                  Command="{Binding CategoryCommand}"/>
+            <ui:OptionSwitchCell Height="44" Title="{r:Text SaveLocation}"
+                                 IsToggled="{Binding SaveLocation, Mode=TwoWay}"/>
         </TableSection>
         <TableSection Title="{r:Text Preference}">
-            <ui:OptionEntryCell Height="36" Title="{r:Text PrimaryColor}"
+            <ui:OptionEntryCell Height="44" Title="{r:Text PrimaryColor}"
                                 Text="{Binding PrimaryColor, Mode=TwoWay}"
                                 Keyboard="Text"/>
             <ViewCell Height="120">
@@ -31,9 +37,14 @@
                     <!--<Label Text="" LineBreakMode="TailTruncation"
                            VerticalOptions="Center"
                            TextColor="{DynamicResource TextColor}"/>-->
-                    <ui:ColorPicker Grid.Column="1" ColorChanged="ColorPicker_ColorChanged"/>
+                    <ui:ColorPicker Grid.Column="1" Command="{Binding ColorPickerCommand}"/>
                 </Grid>
             </ViewCell>
         </TableSection>
+        <TableSection Title="{r:Text Diagnostic}">
+            <ui:OptionSelectCell Height="44" Title="{r:Text ShareLogs}"
+                                 Detail="{Binding ManyRecords}"
+                                 Command="{Binding ShareLogsCommand}"/>
+        </TableSection>
     </TableView>
 </ui:BillingPage>

Billing.Shared/Views/SettingPage.xaml.cs

@@ -1,50 +1,89 @@
+using System.IO;
+using Billing.Store;
 using Billing.Themes;
 using Billing.UI;
-using System.Globalization;
 using Xamarin.Essentials;
 using Xamarin.Forms;
+using Resource = Billing.Languages.Resource;
 
 namespace Billing.Views
 {
     public partial class SettingPage : BillingPage
     {
-        private static readonly BindableProperty VersionProperty = BindableProperty.Create(nameof(Version), typeof(string), typeof(SettingPage));
+        private static readonly BindableProperty VersionProperty = Helper.Create<string, SettingPage>(nameof(Version));
-        private static readonly BindableProperty PrimaryColorProperty = BindableProperty.Create(nameof(PrimaryColor), typeof(string), typeof(SettingPage));
+        private static readonly BindableProperty SaveLocationProperty = Helper.Create<bool, SettingPage>(nameof(SaveLocation));
+        private static readonly BindableProperty PrimaryColorProperty = Helper.Create<string, SettingPage>(nameof(PrimaryColor));
+        private static readonly BindableProperty ManyRecordsProperty = Helper.Create<string, SettingPage>(nameof(ManyRecords));
 
         public string Version => (string)GetValue(VersionProperty);
+        public bool SaveLocation
+        {
+            get => (bool)GetValue(SaveLocationProperty);
+            set => SetValue(SaveLocationProperty, value);
+        }
         public string PrimaryColor
         {
             get => (string)GetValue(PrimaryColorProperty);
             set => SetValue(PrimaryColorProperty, value);
         }
+        public string ManyRecords => (string)GetValue(ManyRecordsProperty);
 
+        public Command ShareCommand { get; }
         public Command CategoryCommand { get; }
+        public Command ColorPickerCommand { get; }
+        public Command ShareLogsCommand { get; }
 
         public SettingPage()
         {
+            ShareCommand = new Command(OnShareCommand);
             CategoryCommand = new Command(OnCategoryCommand);
+            ColorPickerCommand = new Command(OnColorPickerCommand);
+            ShareLogsCommand = new Command(OnShareLogsCommand);
             InitializeComponent();
 
-            var (main, build) = Definition.GetVersion();
+            SetValue(VersionProperty, $"{AppInfo.VersionString} ({AppInfo.BuildString})");
-            SetValue(VersionProperty, $"{main} ({build})");
         }
 
-        protected override void OnAppearing()
+        protected override async void OnAppearing()
         {
             base.OnAppearing();
 
-            //SetValue(VersionProperty, $"{AppInfo.VersionString} ({AppInfo.BuildString})");
+            SaveLocation = App.SaveLocation;
             var colorString = Preferences.Get(Definition.PrimaryColorKey, Helper.DEFAULT_COLOR);
             PrimaryColor = Helper.WrapColorString(colorString);
+
+            var count = await StoreHelper.GetLogsCount();
+            SetValue(ManyRecordsProperty, string.Format(Resource.ManyRecords, count));
         }
 
         protected override void OnDisappearing()
         {
             base.OnDisappearing();
 
-            var color = PrimaryColor;
+            App.SetSaveLocation(SaveLocation);
-            Preferences.Set(Definition.PrimaryColorKey, color);
+            Preferences.Set(Definition.SaveLocationKey, SaveLocation);
-            Light.Instance.RefreshColor(Color.FromHex(color));
+            Preferences.Set(Definition.PrimaryColorKey, PrimaryColor);
+        }
+
+        protected override async void OnRefresh()
+        {
+            var count = await StoreHelper.GetLogsCount();
+            SetValue(ManyRecordsProperty, string.Format(Resource.ManyRecords, count));
+        }
+
+        private async void OnShareCommand()
+        {
+            if (Tap.IsBusy)
+            {
+                return;
+            }
+            using (Tap.Start())
+            {
+                await Share.RequestAsync(new ShareFileRequest
+                {
+                    File = new ShareFile(StoreHelper.DatabasePath, "application/vnd.sqlite3")
+                });
+            }
         }
 
         private async void OnCategoryCommand()
@@ -60,9 +99,73 @@ namespace Billing.Views
             }
         }
 
-        private void ColorPicker_ColorChanged(object sender, Color e)
+        private void OnColorPickerCommand(object o)
         {
-            PrimaryColor = Helper.WrapColorString(e.ToHex());
+            if (o is Color color)
+            {
+                PrimaryColor = Helper.WrapColorString(color.ToHex());
+                Light.Instance.RefreshColor(color);
+            }
+        }
+
+        private async void OnShareLogsCommand()
+        {
+            if (Tap.IsBusy)
+            {
+                return;
+            }
+            using (Tap.Start())
+            {
+                string file;
+                var count = await StoreHelper.GetLogsCount();
+                if (count > 0)
+                {
+                    file = await StoreHelper.ExportLogs();
+                }
+                else
+                {
+                    file = StoreHelper.GetLogFile();
+                }
+                if (file != null && File.Exists(file))
+                {
+#if __IOS__
+                    var sendEmail = Resource.SendEmail;
+                    var shareLogs = Resource.ShareLogs;
+                    var result = await DisplayActionSheet(Resource.HowToShareDiagnostic, Resource.Cancel, null, sendEmail, shareLogs);
+                    if (result == sendEmail)
+                    {
+                        try
+                        {
+                            await Email.ComposeAsync(new EmailMessage
+                            {
+                                To = { "tsorgy@gmail.com " },
+                                Subject = Resource.ShareLogs,
+                                Attachments =
+                                {
+                                    new(file, "text/csv")
+                                }
+                            });
+                        }
+                        catch (System.Exception ex)
+                        {
+                            Helper.Error("email.send", ex);
+                        }
+                    }
+                    else if (result == shareLogs)
+                    {
+                        await Share.RequestAsync(new ShareFileRequest
+                        {
+                            File = new ShareFile(file, "text/csv")
+                        });
+                    }
+#else
+                    await Share.RequestAsync(new ShareFileRequest
+                    {
+                        File = new ShareFile(file, "text/csv")
+                    });
+#endif
+                }
+            }
         }
     }
 }

Billing.Shared/Views/ViewLocationPage.cs

@@ -0,0 +1,129 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Billing.Models;
+using Billing.UI;
+using Xamarin.Essentials;
+using Xamarin.Forms;
+using Xamarin.Forms.Maps;
+using Xamarin.Forms.PlatformConfiguration.iOSSpecific;
+using Map = Xamarin.Forms.Maps.Map;
+
+namespace Billing.Views
+{
+    public class ViewLocationPage : BillingPage
+    {
+        public event EventHandler<Location> Synced;
+
+        private readonly Bill bill;
+
+        private CancellationTokenSource tokenSource;
+
+        public ViewLocationPage(Bill bill)
+        {
+            On<Xamarin.Forms.PlatformConfiguration.iOS>().SetUseSafeArea(false);
+            this.bill = bill;
+            Title = bill.Name;
+
+            ToolbarItems.Add(new ToolbarItem
+            {
+                IconImageSource = "location.png",
+                Order = ToolbarItemOrder.Primary,
+                Command = new Command(OnSynced)
+            });
+
+            if (bill.Latitude != null && bill.Longitude != null)
+            {
+                var (longitude, latitude) = (bill.Longitude.Value, bill.Latitude.Value).Wgs84ToGcj02();
+                var position = new Position(latitude, longitude);
+                var mapSpan = new MapSpan(position, 0.01, 0.01);
+                Content = new Map(mapSpan)
+                {
+                    Pins =
+                    {
+                        new Pin
+                        {
+                            Label = bill.Name,
+                            Type = PinType.Generic,
+                            Position = position,
+                            Address = bill.Store
+                        }
+                    }
+                };
+            }
+        }
+
+        protected override void OnDisappearing()
+        {
+            if (tokenSource != null && !tokenSource.IsCancellationRequested)
+            {
+                tokenSource.Cancel();
+            }
+            base.OnDisappearing();
+        }
+
+        private async void OnSynced()
+        {
+            if (Tap.IsBusy)
+            {
+                return;
+            }
+            using (Tap.Start())
+            {
+                if (tokenSource != null)
+                {
+                    return;
+                }
+                var location = await GetCurrentLocation();
+                if (location != null)
+                {
+                    Synced?.Invoke(this, location);
+
+                    MainThread.BeginInvokeOnMainThread(() =>
+                    {
+                        var (longitude, latitude) = (location.Longitude, location.Latitude).Wgs84ToGcj02();
+                        var position = new Position(latitude, longitude);
+                        var mapSpan = new MapSpan(position, 0.01, 0.01);
+                        Content = new Map(mapSpan)
+                        {
+                            Pins =
+                            {
+                                new Pin
+                                {
+                                    Label = bill.Name,
+                                    Type = PinType.Generic,
+                                    Position = position,
+                                    Address = bill.Store
+                                }
+                            }
+                        };
+                    });
+                }
+            }
+        }
+
+        private async Task<Location> GetCurrentLocation()
+        {
+            try
+            {
+                var request = new GeolocationRequest(GeolocationAccuracy.Best, TimeSpan.FromSeconds(10));
+                tokenSource = new CancellationTokenSource();
+                var status = await Helper.CheckAndRequestPermissionAsync<Permissions.LocationWhenInUse>();
+                if (status != PermissionStatus.Granted)
+                {
+                    return null;
+                }
+                return await Geolocation.GetLocationAsync(request, tokenSource.Token);
+            }
+            catch (FeatureNotSupportedException) { }
+            catch (FeatureNotEnabledException) { }
+            catch (PermissionException) { }
+            catch (Exception ex)
+            {
+                Helper.Error("location.get", ex);
+            }
+            tokenSource = null;
+            return null;
+        }
+    }
+}

Billing.sln

@@ -9,7 +9,7 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Billing.iOS", "Billing\Bill
 EndProject
 Project("{D954291E-2A0B-460D-934E-DC6B0785DB48}") = "Billing.Shared", "Billing.Shared\Billing.Shared.shproj", "{6AC75D01-70D6-4A07-8685-BC52AFD97A7A}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Svg2Png", "Svg2Png\Svg2Png.csproj", "{6A012FCA-3B1C-4593-ADD7-0751E5815C67}"
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Svg2Png", "Svg2Png\Svg2Png.csproj", "{43BB5B21-61E0-42BB-ADF1-DBCD662E61E1}"
 EndProject
 Global
 	GlobalSection(SharedMSBuildProjectFiles) = preSolution
@@ -62,18 +62,18 @@ Global
 		{5C4F1C35-6F66-4063-9605-A9F37FCABBA8}.Release|iPhoneSimulator.ActiveCfg = Release|iPhoneSimulator
 		{5C4F1C35-6F66-4063-9605-A9F37FCABBA8}.Release|iPhoneSimulator.Build.0 = Release|iPhoneSimulator
 		{5C4F1C35-6F66-4063-9605-A9F37FCABBA8}.Release|iPhoneSimulator.Deploy.0 = Release|iPhoneSimulator
-		{6A012FCA-3B1C-4593-ADD7-0751E5815C67}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{43BB5B21-61E0-42BB-ADF1-DBCD662E61E1}.Debug|Any CPU.ActiveCfg = Debug|iPhoneSimulator
-		{6A012FCA-3B1C-4593-ADD7-0751E5815C67}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{43BB5B21-61E0-42BB-ADF1-DBCD662E61E1}.Debug|Any CPU.Build.0 = Debug|iPhoneSimulator
-		{6A012FCA-3B1C-4593-ADD7-0751E5815C67}.Debug|iPhone.ActiveCfg = Debug|Any CPU
+		{43BB5B21-61E0-42BB-ADF1-DBCD662E61E1}.Debug|iPhone.ActiveCfg = Debug|iPhoneSimulator
-		{6A012FCA-3B1C-4593-ADD7-0751E5815C67}.Debug|iPhone.Build.0 = Debug|Any CPU
+		{43BB5B21-61E0-42BB-ADF1-DBCD662E61E1}.Debug|iPhone.Build.0 = Debug|iPhoneSimulator
-		{6A012FCA-3B1C-4593-ADD7-0751E5815C67}.Debug|iPhoneSimulator.ActiveCfg = Debug|Any CPU
+		{43BB5B21-61E0-42BB-ADF1-DBCD662E61E1}.Debug|iPhoneSimulator.ActiveCfg = Debug|iPhoneSimulator
-		{6A012FCA-3B1C-4593-ADD7-0751E5815C67}.Debug|iPhoneSimulator.Build.0 = Debug|Any CPU
+		{43BB5B21-61E0-42BB-ADF1-DBCD662E61E1}.Debug|iPhoneSimulator.Build.0 = Debug|iPhoneSimulator
-		{6A012FCA-3B1C-4593-ADD7-0751E5815C67}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{43BB5B21-61E0-42BB-ADF1-DBCD662E61E1}.Release|Any CPU.ActiveCfg = Release|iPhoneSimulator
-		{6A012FCA-3B1C-4593-ADD7-0751E5815C67}.Release|Any CPU.Build.0 = Release|Any CPU
+		{43BB5B21-61E0-42BB-ADF1-DBCD662E61E1}.Release|Any CPU.Build.0 = Release|iPhoneSimulator
-		{6A012FCA-3B1C-4593-ADD7-0751E5815C67}.Release|iPhone.ActiveCfg = Release|Any CPU
+		{43BB5B21-61E0-42BB-ADF1-DBCD662E61E1}.Release|iPhone.ActiveCfg = Release|iPhoneSimulator
-		{6A012FCA-3B1C-4593-ADD7-0751E5815C67}.Release|iPhone.Build.0 = Release|Any CPU
+		{43BB5B21-61E0-42BB-ADF1-DBCD662E61E1}.Release|iPhone.Build.0 = Release|iPhoneSimulator
-		{6A012FCA-3B1C-4593-ADD7-0751E5815C67}.Release|iPhoneSimulator.ActiveCfg = Release|Any CPU
+		{43BB5B21-61E0-42BB-ADF1-DBCD662E61E1}.Release|iPhoneSimulator.ActiveCfg = Release|iPhoneSimulator
-		{6A012FCA-3B1C-4593-ADD7-0751E5815C67}.Release|iPhoneSimulator.Build.0 = Release|Any CPU
+		{43BB5B21-61E0-42BB-ADF1-DBCD662E61E1}.Release|iPhoneSimulator.Build.0 = Release|iPhoneSimulator
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

Billing/Billing.Android/Billing.Android.csproj

@@ -16,12 +16,12 @@
     <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
     <MonoAndroidResourcePrefix>Resources</MonoAndroidResourcePrefix>
     <MonoAndroidAssetsPrefix>Assets</MonoAndroidAssetsPrefix>
-    <TargetFrameworkVersion>v12.0</TargetFrameworkVersion>
+    <TargetFrameworkVersion>v11.0</TargetFrameworkVersion>
     <AndroidEnableSGenConcurrent>true</AndroidEnableSGenConcurrent>
     <AndroidUseAapt2>true</AndroidUseAapt2>
     <AndroidHttpClientHandlerType>Xamarin.Android.Net.AndroidClientHandler</AndroidHttpClientHandlerType>
-    <NuGetPackageImportStamp>
+    <NuGetPackageImportStamp></NuGetPackageImportStamp>
-    </NuGetPackageImportStamp>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
     <LangVersion>9.0</LangVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
@@ -37,11 +37,12 @@
     <EnableLLVM>false</EnableLLVM>
     <AndroidEnableProfiledAot>false</AndroidEnableProfiledAot>
     <BundleAssemblies>false</BundleAssemblies>
-    <AndroidSupportedAbis>x86_64;x86</AndroidSupportedAbis>
+    <AndroidSupportedAbis>x86;x86_64;arm64-v8a</AndroidSupportedAbis>
-    <EmbedAssembliesIntoApk>true</EmbedAssembliesIntoApk>
+    <EmbedAssembliesIntoApk>false</EmbedAssembliesIntoApk>
+    <MandroidI18n />
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
-    <DebugSymbols>true</DebugSymbols>
+    <DebugSymbols>false</DebugSymbols>
     <DebugType>portable</DebugType>
     <Optimize>true</Optimize>
     <OutputPath>bin\Release</OutputPath>
@@ -52,25 +53,28 @@
     <AotAssemblies>false</AotAssemblies>
     <EnableLLVM>false</EnableLLVM>
     <AndroidEnableProfiledAot>false</AndroidEnableProfiledAot>
-    <BundleAssemblies>false</BundleAssemblies>
+    <BundleAssemblies>true</BundleAssemblies>
-    <AndroidSupportedAbis>arm64-v8a</AndroidSupportedAbis>
+    <AndroidSupportedAbis>x86_64;arm64-v8a</AndroidSupportedAbis>
+    <EmbedAssembliesIntoApk>true</EmbedAssembliesIntoApk>
+    <AndroidCreatePackagePerAbi>true</AndroidCreatePackagePerAbi>
+    <AndroidLinkTool>r8</AndroidLinkTool>
+    <MandroidI18n />
   </PropertyGroup>
   <ItemGroup>
     <Reference Include="Mono.Android" />
     <Reference Include="System" />
     <Reference Include="System.Core" />
     <Reference Include="System.Numerics" />
-    <Reference Include="System.Numerics.Vectors" />
     <Reference Include="System.Xml.Linq" />
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Microcharts.Forms">
+    <PackageReference Include="Microcharts.Forms" Version="0.9.5.9" />
-      <Version>0.9.5.9</Version>
-    </PackageReference>
     <PackageReference Include="SkiaSharp.Views.Forms" Version="2.80.3" />
-    <PackageReference Include="Xamarin.Forms" Version="5.0.0.2337" />
+    <PackageReference Include="sqlite-net-pcl" Version="1.8.116" />
-    <PackageReference Include="Xamarin.Essentials" Version="1.7.1" />
+    <PackageReference Include="Xamarin.Forms" Version="5.0.0.2401" />
+    <PackageReference Include="Xamarin.Essentials" Version="1.7.2" />
+    <PackageReference Include="Xamarin.Forms.Maps" Version="5.0.0.2401" />
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Definition.cs" />
@@ -90,6 +94,8 @@
     <Compile Include="Renderers\TintImageButtonRenderer.cs" />
     <Compile Include="Renderers\BillingPageRenderer.cs" />
     <Compile Include="Renderers\BlurryPanelRenderer.cs" />
+    <Compile Include="Renderers\SegmentedControlRenderer.cs" />
+    <Compile Include="Renderers\OptionPickerRenderer.cs" />
   </ItemGroup>
   <ItemGroup>
     <AndroidAsset Include="Assets\fa-brands-400.ttf" />
@@ -129,6 +135,66 @@
       <Generator>
       </Generator>
     </AndroidResource>
+    <AndroidResource Include="Resources\layout\RadioGroup.xml">
+      <SubType>
+      </SubType>
+      <Generator>
+      </Generator>
+    </AndroidResource>
+    <AndroidResource Include="Resources\layout\RadioButton.xml">
+      <SubType>
+      </SubType>
+      <Generator>
+      </Generator>
+    </AndroidResource>
+    <AndroidResource Include="Resources\color\segmented_control_text.xml">
+      <SubType>
+      </SubType>
+      <Generator>
+      </Generator>
+    </AndroidResource>
+    <AndroidResource Include="Resources\drawable\segmented_control_background.xml">
+      <SubType>
+      </SubType>
+      <Generator>
+      </Generator>
+    </AndroidResource>
+    <AndroidResource Include="Resources\drawable\segmented_control_first_background.xml">
+      <SubType>
+      </SubType>
+      <Generator>
+      </Generator>
+    </AndroidResource>
+    <AndroidResource Include="Resources\drawable\segmented_control_last_background.xml">
+      <SubType>
+      </SubType>
+      <Generator>
+      </Generator>
+    </AndroidResource>
+    <AndroidResource Include="Resources\drawable\share.png">
+      <SubType>
+      </SubType>
+      <Generator>
+      </Generator>
+    </AndroidResource>
+    <AndroidResource Include="Resources\drawable-mdpi\share.png">
+      <SubType>
+      </SubType>
+      <Generator>
+      </Generator>
+    </AndroidResource>
+    <AndroidResource Include="Resources\drawable-xhdpi\share.png">
+      <SubType>
+      </SubType>
+      <Generator>
+      </Generator>
+    </AndroidResource>
+    <AndroidResource Include="Resources\drawable-xxhdpi\share.png">
+      <SubType>
+      </SubType>
+      <Generator>
+      </Generator>
+    </AndroidResource>
   </ItemGroup>
   <ItemGroup>
     <AndroidResource Include="Resources\drawable\splash_logo.png" />
@@ -543,6 +609,9 @@
   <ItemGroup>
     <AndroidResource Include="Resources\drawable\left.png" />
   </ItemGroup>
+  <ItemGroup>
+    <AndroidResource Include="Resources\xml\shortcuts.xml" />
+  </ItemGroup>
   <Import Project="..\..\Billing.Shared\Billing.Shared.projitems" Label="Shared" />
   <Import Project="$(MSBuildExtensionsPath)\Xamarin\Android\Xamarin.Android.CSharp.targets" />
 </Project>

Billing/Billing.Android/Definition.cs

@@ -2,20 +2,9 @@
 {
     public static partial class Definition
     {
-        public static partial (string main, long build) GetVersion()
+        public const string RegularFontFamily = "OpenSans-Regular.ttf#OpenSans-Regular";
-        {
+        public const string SemiBoldFontFamily = "OpenSans-SemiBold.ttf#OpenSans-SemiBold";
-            var context = Android.App.Application.Context;
+        public const string BoldFontFamily = "OpenSans-Bold.ttf#OpenSans-Bold";
-            var manager = context.PackageManager;
+        public const string BrandsFontFamily = "fa-brands-400.ttf#FontAwesome6Brands-Regular";
-            var info = manager.GetPackageInfo(context.PackageName, 0);
-
-            string version = info.VersionName;
-            long build = info.LongVersionCode;
-
-            return (version, build);
-        }
-        public static partial string GetRegularFontFamily() => "OpenSans-Regular.ttf#OpenSans-Regular";
-        public static partial string GetSemiBoldFontFamily() => "OpenSans-SemiBold.ttf#OpenSans-SemiBold";
-        public static partial string GetBoldFontFamily() => "OpenSans-Bold.ttf#OpenSans-Bold";
-        public static partial string GetBrandsFontFamily() => "fa-brands-400.ttf#FontAwesome6Brands-Regular";
     }
 }

Billing/Billing.Android/MainActivity.cs

@@ -1,7 +1,11 @@
 using Android.App;
+using Android.Content;
 using Android.Content.PM;
 using Android.Runtime;
 using Android.OS;
+using Android.Net;
+using Android.Provider;
+using Android.Database;
 
 namespace Billing.Droid
 {
@@ -18,9 +22,26 @@ namespace Billing.Droid
         {
             base.OnCreate(savedInstanceState);
 
+            string url;
+            if (Intent.ActionView.Equals(Intent.Action) && Intent.Data is Uri uri)
+            {
+                if (uri.Authority == "org.tsanie.billing.shortcuts")
+                {
+                    url = uri.Path;
+                }
+                else
+                {
+                    url = GetFilePath(BaseContext, uri);
+                }
+            }
+            else
+            {
+                url = null;
+            }
             Xamarin.Essentials.Platform.Init(this, savedInstanceState);
             Xamarin.Forms.Forms.Init(this, savedInstanceState);
-            LoadApplication(new App());
+            Xamarin.FormsMaps.Init(this, savedInstanceState);
+            LoadApplication(new App(url));
         }
 
         public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Permission[] grantResults)
@@ -29,5 +50,83 @@ namespace Billing.Droid
 
             base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
         }
+
+        private string GetFilePath(Context context, Uri uri)
+        {
+            if (DocumentsContract.IsDocumentUri(context, uri))
+            {
+                Uri contentUri;
+                string[] split;
+                switch (uri.Authority)
+                {
+                    case "com.android.externalstorage.documents":
+                        split = DocumentsContract.GetDocumentId(uri).Split(':');
+                        if (split[0] == "primary")
+                        {
+                            var external = ExternalCacheDir.Path;
+                            external = external[..external.IndexOf("/Android/")];
+                            return external + "/" + split[1];
+                        }
+                        break;
+
+                    case "com.android.providers.downloads.documents":
+                        contentUri = ContentUris.WithAppendedId(
+                            Uri.Parse("content://downloads/public_downloads"),
+                            long.Parse(DocumentsContract.GetDocumentId(uri)));
+                        return GetDataColumn(context, contentUri, null, null);
+
+                    case "com.android.providers.media.documents":
+                        split = DocumentsContract.GetDocumentId(uri).Split(':');
+                        contentUri = split[0] switch
+                        {
+                            "image" => MediaStore.Images.Media.ExternalContentUri,
+                            "video" => MediaStore.Video.Media.ExternalContentUri,
+                            "audio" => MediaStore.Audio.Media.ExternalContentUri,
+                            _ => null
+                        };
+                        return GetDataColumn(context, contentUri, "_id=?", new[] { split[1] });
+                }
+            }
+            else if (uri.Scheme == "content")
+            {
+                if (uri.Authority == "com.speedsoftware.rootexplorer.fileprovider")
+                {
+                    var path = uri.Path;
+                    if (path.StartsWith("/root/"))
+                    {
+                        return path[5..];
+                    }
+                    return path;
+                }
+                return GetDataColumn(context, uri, null, null);
+            }
+            else if (uri.Scheme == "file")
+            {
+                return uri.Path;
+            }
+            return null;
+        }
+
+        private string GetDataColumn(Context context, Uri uri, string selection, string[] selectionArgs)
+        {
+            ICursor cursor = null;
+            try
+            {
+                cursor = context.ContentResolver.Query(uri, new[] { "_data" }, selection, selectionArgs, null);
+                if (cursor != null && cursor.MoveToFirst())
+                {
+                    var index = cursor.GetColumnIndexOrThrow("_data");
+                    return cursor.GetString(index);
+                }
+            }
+            finally
+            {
+                if (cursor != null)
+                {
+                    cursor.Close();
+                }
+            }
+            return null;
+        }
     }
 }

Billing/Billing.Android/Properties/AndroidManifest.xml

@@ -1,6 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="0.8.309" package="org.tsanie.billing" android:installLocation="auto" android:versionCode="8">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="1.2.411" package="org.tsanie.billing" android:installLocation="auto" android:versionCode="21s">
-	<uses-sdk android:minSdkVersion="24" android:targetSdkVersion="31" />
+	<uses-sdk android:minSdkVersion="24" android:targetSdkVersion="30" />
-	<application android:label="@string/applabel" android:theme="@style/MainTheme"></application>
+	<application android:label="@string/applabel" android:theme="@style/MainTheme" android:requestLegacyExternalStorage="true"></application>
 	<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+	<queries>
+		<intent>
+			<action android:name="android.intent.action.SENDTO" />
+			<data android:scheme="mailto" />
+		</intent>
+	</queries>
 </manifest>

Billing/Billing.Android/Properties/AssemblyInfo.cs

@@ -27,3 +27,11 @@ using Android.App;
 // Add some common permissions, these can be removed if not needed
 [assembly: UsesPermission(Android.Manifest.Permission.Internet)]
 [assembly: UsesPermission(Android.Manifest.Permission.WriteExternalStorage)]
+[assembly: UsesPermission(Android.Manifest.Permission.ReadExternalStorage)]
+[assembly: UsesPermission(Android.Manifest.Permission.ManageExternalStorage)]
+[assembly: UsesPermission(Android.Manifest.Permission.Vibrate)]
+[assembly: UsesPermission(Android.Manifest.Permission.AccessCoarseLocation)]
+[assembly: UsesPermission(Android.Manifest.Permission.AccessFineLocation)]
+[assembly: UsesFeature("android.hardware.location", Required = false)]
+[assembly: UsesFeature("android.hardware.location.gps", Required = false)]
+[assembly: UsesFeature("android.hardware.location.network", Required = false)]

Billing/Billing.Android/Renderers/BillingPageRenderer.cs

@@ -18,7 +18,7 @@ namespace Billing.Droid.Renderers
             base.OnAttachedToWindow();
             if (Element is BillingPage page)
             {
-                page.OnLoaded();
+                page.TriggerLoad();
             }
         }
     }

Billing/Billing.Android/Renderers/OptionDatePickerRenderer.cs

@@ -18,10 +18,12 @@ namespace Billing.Droid.Renderers
         {
             base.OnElementChanged(e);
 
-            if (e.NewElement != null)
+            var control = Control;
+            if (e.NewElement != null && control != null)
             {
                 var drawable = new ColorDrawable(e.NewElement.BackgroundColor.ToAndroid());
-                Control.SetBackground(drawable);
+                control.SetBackground(drawable);
+                control.Gravity = Android.Views.GravityFlags.CenterHorizontal;
             }
         }
     }

Billing/Billing.Android/Renderers/OptionPickerRenderer.cs

@@ -0,0 +1,29 @@
+using Android.Content;
+using Android.Graphics.Drawables;
+using Billing.Droid.Renderers;
+using Billing.UI;
+using Xamarin.Forms;
+using Xamarin.Forms.Platform.Android;
+
+[assembly: ExportRenderer(typeof(OptionPicker), typeof(OptionPickerRenderer))]
+namespace Billing.Droid.Renderers
+{
+    public class OptionPickerRenderer : PickerRenderer
+    {
+        public OptionPickerRenderer(Context context) : base(context)
+        {
+        }
+
+        protected override void OnElementChanged(ElementChangedEventArgs<Picker> e)
+        {
+            base.OnElementChanged(e);
+
+            var control = Control;
+            if (e.NewElement != null && control != null)
+            {
+                var drawable = new ColorDrawable(e.NewElement.BackgroundColor.ToAndroid());
+                control.SetBackground(drawable);
+            }
+        }
+    }
+}

Billing/Billing.Android/Renderers/OptionTimePickerRenderer.cs

@@ -18,10 +18,11 @@ namespace Billing.Droid.Renderers
         {
             base.OnElementChanged(e);
 
-            if (e.NewElement != null)
+            var control = Control;
+            if (e.NewElement != null && control != null)
             {
                 var drawable = new ColorDrawable(e.NewElement.BackgroundColor.ToAndroid());
-                Control.SetBackground(drawable);
+                control.SetBackground(drawable);
             }
         }
     }

Billing/Billing.Android/Renderers/SegmentedControlRenderer.cs

@@ -0,0 +1,245 @@
+using Android.Content;
+using Android.Graphics.Drawables;
+using Android.Views;
+using Android.Widget;
+using Billing.Droid.Renderers;
+using Billing.UI;
+using Xamarin.Forms;
+using Xamarin.Forms.Platform.Android;
+using RadioButton = Android.Widget.RadioButton;
+
+[assembly: ExportRenderer(typeof(SegmentedControl), typeof(SegmentedControlRenderer))]
+namespace Billing.Droid.Renderers
+{
+    public class SegmentedControlRenderer : ViewRenderer<SegmentedControl, RadioGroup>
+    {
+        RadioGroup nativeControl;
+        RadioButton _rb;
+        readonly Context context;
+
+        public SegmentedControlRenderer(Context context) : base(context)
+        {
+            this.context = context;
+        }
+
+        protected override void OnElementChanged(ElementChangedEventArgs<SegmentedControl> e)
+        {
+            base.OnElementChanged(e);
+
+            if (Control == null)
+            {
+                // Instantiate the native control and assign it to the Control property with
+                // the SetNativeControl method
+                var layoutInflater = LayoutInflater.From(context);
+
+                var view = layoutInflater.Inflate(Resource.Layout.RadioGroup, null);
+
+                nativeControl = (RadioGroup)layoutInflater.Inflate(Resource.Layout.RadioGroup, null);
+                var density = context.Resources.DisplayMetrics.Density;
+
+                for (var i = 0; i < Element.Children.Count; i++)
+                {
+                    var o = Element.Children[i];
+                    var rb = (RadioButton)layoutInflater.Inflate(Resource.Layout.RadioButton, null);
+
+                    var width = rb.Paint.MeasureText(o.Text) * density + 0.5f;
+                    rb.LayoutParameters = new RadioGroup.LayoutParams((int)width, LayoutParams.WrapContent, 1f);
+                    rb.Text = o.Text;
+
+                    if (i == 0)
+                        rb.SetBackgroundResource(Resource.Drawable.segmented_control_first_background);
+                    else if (i == Element.Children.Count - 1)
+                        rb.SetBackgroundResource(Resource.Drawable.segmented_control_last_background);
+                    else
+                        rb.SetBackgroundResource(Resource.Drawable.segmented_control_background);
+
+                    ConfigureRadioButton(i, rb);
+
+                    nativeControl.AddView(rb);
+                }
+
+                var option = (RadioButton)nativeControl.GetChildAt(Element.SelectedSegmentIndex);
+
+                if (option != null)
+                    option.Checked = true;
+
+                SetNativeControl(nativeControl);
+            }
+
+            if (e.OldElement != null)
+            {
+                // Unsubscribe from event handlers and cleanup any resources
+                if (nativeControl != null)
+                    nativeControl.CheckedChange -= NativeControl_ValueChanged;
+            }
+
+            if (e.NewElement != null)
+            {
+                // Configure the control and subscribe to event handlers
+                nativeControl.CheckedChange += NativeControl_ValueChanged;
+            }
+        }
+
+        protected override void OnElementPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
+        {
+            base.OnElementPropertyChanged(sender, e);
+
+            if (nativeControl == null || Element == null) return;
+
+            switch (e.PropertyName)
+            {
+                case "Renderer":
+                    Element?.SendValueChanged();
+                    break;
+                case nameof(SegmentedControl.SelectedSegmentIndex):
+                    var option = (RadioButton)nativeControl.GetChildAt(Element.SelectedSegmentIndex);
+
+                    if (option != null)
+                        option.Checked = true;
+
+                    if (Element.SelectedSegmentIndex < 0)
+                    {
+                        var layoutInflater = LayoutInflater.From(context);
+
+                        nativeControl = (RadioGroup)layoutInflater.Inflate(Resource.Layout.RadioGroup, null);
+
+                        for (var i = 0; i < Element.Children.Count; i++)
+                        {
+                            var o = Element.Children[i];
+                            var rb = (RadioButton)layoutInflater.Inflate(Resource.Layout.RadioButton, null);
+
+                            var width = rb.Paint.MeasureText(o.Text);
+                            rb.LayoutParameters = new RadioGroup.LayoutParams((int)width, LayoutParams.WrapContent, 1f);
+                            rb.Text = o.Text;
+
+                            if (i == 0)
+                                rb.SetBackgroundResource(Resource.Drawable.segmented_control_first_background);
+                            else if (i == Element.Children.Count - 1)
+                                rb.SetBackgroundResource(Resource.Drawable.segmented_control_last_background);
+                            else
+                                rb.SetBackgroundResource(Resource.Drawable.segmented_control_background);
+
+                            ConfigureRadioButton(i, rb);
+
+                            nativeControl.AddView(rb);
+                        }
+
+                        nativeControl.CheckedChange += NativeControl_ValueChanged;
+
+                        SetNativeControl(nativeControl);
+                    }
+
+                    Element.SendValueChanged();
+                    break;
+                case nameof(SegmentedControl.TintColor):
+                    OnPropertyChanged();
+                    break;
+                case nameof(SegmentedControl.IsEnabled):
+                    OnPropertyChanged();
+                    break;
+                case nameof(SegmentedControl.SelectedTextColor):
+                    var v = (RadioButton)nativeControl.GetChildAt(Element.SelectedSegmentIndex);
+                    v.SetTextColor(Element.SelectedTextColor.ToAndroid());
+                    break;
+            }
+        }
+
+        void OnPropertyChanged()
+        {
+            if (nativeControl != null && Element != null)
+            {
+                for (var i = 0; i < Element.Children.Count; i++)
+                {
+                    var rb = (RadioButton)nativeControl.GetChildAt(i);
+
+                    ConfigureRadioButton(i, rb);
+                }
+            }
+        }
+
+        void ConfigureRadioButton(int i, RadioButton rb)
+        {
+            var textColor = Element.SelectedTextColor;
+            if (i == Element.SelectedSegmentIndex)
+            {
+                rb.SetTextColor(textColor.ToAndroid());
+                rb.Paint.FakeBoldText = true;
+                _rb = rb;
+            }
+            else
+            {
+                var tColor = Element.IsEnabled ?
+                    textColor.IsDefault ? Element.TintColor.ToAndroid() : textColor.MultiplyAlpha(.6).ToAndroid() :
+                    Element.DisabledColor.ToAndroid();
+                rb.SetTextColor(tColor);
+            }
+
+            GradientDrawable selectedShape;
+            GradientDrawable unselectedShape;
+
+            var gradientDrawable = (StateListDrawable)rb.Background;
+            var drawableContainerState = (DrawableContainer.DrawableContainerState)gradientDrawable.GetConstantState();
+            var children = drawableContainerState.GetChildren();
+
+            // Doesnt works on API < 18
+            selectedShape = children[0] is GradientDrawable selected ? selected : (GradientDrawable)((InsetDrawable)children[0]).Drawable;
+            unselectedShape = children[1] is GradientDrawable unselected ? unselected : (GradientDrawable)((InsetDrawable)children[1]).Drawable;
+
+            var color = Element.IsEnabled ? Element.TintColor.ToAndroid() : Element.DisabledColor.ToAndroid();
+
+            selectedShape.SetStroke(3, color);
+            selectedShape.SetColor(color);
+            unselectedShape.SetStroke(3, color);
+
+            rb.Enabled = Element.IsEnabled;
+        }
+
+        void NativeControl_ValueChanged(object sender, RadioGroup.CheckedChangeEventArgs e)
+        {
+            var rg = (RadioGroup)sender;
+            if (rg.CheckedRadioButtonId != -1)
+            {
+                var id = rg.CheckedRadioButtonId;
+                var radioButton = rg.FindViewById(id);
+                var radioId = rg.IndexOfChild(radioButton);
+
+                var rb = (RadioButton)rg.GetChildAt(radioId);
+
+                var textColor = Element.SelectedTextColor;
+                var color = Element.IsEnabled ?
+                    textColor.IsDefault ? Element.TintColor.ToAndroid() : textColor.MultiplyAlpha(.6).ToAndroid() :
+                    Element.DisabledColor.ToAndroid();
+                if (_rb != null)
+                {
+                    _rb.SetTextColor(color);
+                    _rb.Paint.FakeBoldText = false;
+                }
+                rb.SetTextColor(Element.SelectedTextColor.ToAndroid());
+                rb.Paint.FakeBoldText = true;
+                _rb = rb;
+
+                Element.SelectedSegmentIndex = radioId;
+            }
+        }
+
+        protected override void Dispose(bool disposing)
+        {
+            if (nativeControl != null)
+            {
+                nativeControl.CheckedChange -= NativeControl_ValueChanged;
+                nativeControl.Dispose();
+                nativeControl = null;
+                _rb = null;
+            }
+
+            try
+            {
+                base.Dispose(disposing);
+            }
+            catch
+            {
+                return;
+            }
+        }
+    }
+}

Billing/Billing.Android/Resources/color/segmented_control_text.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+     <item android:state_checked="true" android:color="@color/normal"/>
+     <item android:color="@color/selected" />
+ </selector>

Billing/Billing.Android/Resources/drawable/segmented_control_background.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+     <item android:state_checked="true">
+         <inset android:insetRight="-1dp">
+             <shape android:id="@+id/shape_id" xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
+                 <solid android:color="@color/selected" />
+                 <stroke android:width="1dp" android:color="@color/selected" />
+             </shape>
+         </inset>
+     </item>
+     <item android:state_checked="false">
+         <inset android:insetRight="-1dp">
+             <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
+                 <solid android:color="@color/normal" />
+                 <stroke android:width="1dp" android:color="@color/selected" />
+             </shape>
+         </inset>
+     </item>
+ </selector>

Billing/Billing.Android/Resources/drawable/segmented_control_first_background.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+     <item android:state_checked="true">
+         <inset android:insetRight="-1dp">
+             <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
+                 <solid android:color="@color/selected" />
+                 <stroke android:width="1dp" android:color="@color/selected" />
+                 <corners android:topLeftRadius="2sp" android:bottomLeftRadius="2sp" />
+             </shape>
+         </inset>
+     </item>
+     <item android:state_checked="false">
+         <inset android:insetRight="-1dp">
+             <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
+                 <solid android:color="@color/normal" />
+                 <stroke android:width="1dp" android:color="@color/selected" />
+                 <corners android:topLeftRadius="2sp" android:bottomLeftRadius="2sp" />
+             </shape>
+         </inset>
+     </item>
+ </selector>

Billing/Billing.Android/Resources/drawable/segmented_control_last_background.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+     <item android:state_checked="true">
+         <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
+             <solid android:color="@color/selected" />
+             <stroke android:width="1dp" android:color="@color/selected" />
+             <corners android:topRightRadius="2sp" android:bottomRightRadius="2sp" />
+         </shape>
+     </item>
+     <item android:state_checked="false">
+         <shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
+             <solid android:color="@color/normal" />
+             <stroke android:width="1dp" android:color="@color/selected" />
+             <corners android:topRightRadius="2sp" android:bottomRightRadius="2sp" />
+         </shape>
+     </item>
+ </selector>

Billing/Billing.Android/Resources/layout/RadioButton.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<RadioButton xmlns:android="http://schemas.android.com/apk/res/android"
+     android:button="@null"
+     android:gravity="center"
+     android:background="@drawable/segmented_control_background"
+     android:textColor="@color/segmented_control_text"
+     android:layout_width="0dp"
+     android:layout_height="wrap_content"
+     android:layout_weight="1"
+     android:paddingLeft="10dp"
+     android:paddingRight="10dp"
+     android:minHeight="30dp"
+     android:textSize="12sp" />

Billing/Billing.Android/Resources/layout/RadioGroup.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<RadioGroup xmlns:android="http://schemas.android.com/apk/res/android"
+     android:layout_width="match_parent"
+     android:layout_height="match_parent"
+     android:orientation="horizontal"
+     android:id="@+id/SegControl" />

Billing/Billing.Android/Resources/values-zh-rCN/strings.xml

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <resources>
     <string name="applabel">记账本</string>
+    <string name="newbill">记录一条</string>
 </resources>

Billing/Billing.Android/Resources/values/colors.xml

@@ -3,5 +3,7 @@
 	<color name="colorPrimary">#183153</color>
 	<color name="colorPrimaryDark">#2B0B98</color>
 	<color name="colorAccent">#2B0B98</color>
+	<color name="normal">@android:color/transparent</color>
+	<color name="selected">#007AFF</color>
 	<color name="splash_background">?android:attr/colorBackground</color>
 </resources>

Billing/Billing.Android/Resources/values/strings.xml

@@ -1,4 +1,5 @@
 <?xml version="1.0" encoding="UTF-8" ?>
 <resources>
     <string name="applabel">Billing</string>
+    <string name="newbill">Write a bill</string>
 </resources>

Billing/Billing.Android/Resources/xml/shortcuts.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<shortcuts xmlns:android="http://schemas.android.com/apk/res/android">
+	<shortcut android:shortcutId="newbill" android:enabled="true" android:icon="@drawable/daily" android:shortcutShortLabel="@string/newbill" android:shortcutLongLabel="@string/newbill" android:shortcutDisabledMessage="@string/newbill">
+		<intent android:action="android.intent.action.VIEW" android:targetPackage="org.tsanie.billing" android:targetClass="org.tsanie.billing.SplashScreen" android:data="content://org.tsanie.billing.shortcuts/newbill" />
+	</shortcut>
+</shortcuts>

Billing/Billing.Android/SplashActivity.cs

@@ -1,5 +1,6 @@
 using Android.App;
 using Android.Content;
+using Android.Net;
 using Android.OS;
 using AndroidX.AppCompat.App;
 using System.Threading.Tasks;
@@ -11,6 +12,15 @@ namespace Billing.Droid
         NoHistory = true,
         Theme = "@style/MainTheme.Splash",
         Name = "org.tsanie.billing.SplashScreen")]
+    [IntentFilter(
+        new[] { Intent.ActionView },
+        Categories = new[] { Intent.CategoryDefault, Intent.CategoryBrowsable },
+        //DataScheme = "file",
+        DataMimeType = "*/*",
+        DataPathPattern = ".*\\.db3")]
+    [MetaData(
+        "android.app.shortcuts",
+        Resource = "@xml/shortcuts")]
     public class SplashActivity : AppCompatActivity
     {
         public override void OnCreate(Bundle savedInstanceState, PersistableBundle persistentState)
@@ -23,7 +33,16 @@ namespace Billing.Droid
         protected override void OnResume()
         {
             base.OnResume();
-            Task.Run(() => StartActivity(new Intent(Application.Context, typeof(MainActivity))));
+            Task.Run(() =>
+            {
+                var intent = new Intent(Application.Context, typeof(MainActivity));
+                if (Intent?.Data is Uri uri)
+                {
+                    intent.SetAction(Intent.ActionView);
+                    intent.SetData(uri);
+                }
+                StartActivity(intent);
+            });
         }
     }
 }

Billing/Billing.iOS/AppDelegate.cs

@@ -19,9 +19,55 @@ namespace Billing.iOS
         public override bool FinishedLaunching(UIApplication app, NSDictionary options)
         {
             Xamarin.Forms.Forms.Init();
-            LoadApplication(new App());
+            Xamarin.FormsMaps.Init();
+            string action;
+            if (options != null && options.TryGetValue(UIApplication.LaunchOptionsShortcutItemKey, out var obj) && obj is UIApplicationShortcutItem shortcut)
+            {
+                action = "/" + shortcut.Type;
+            }
+            else
+            {
+                action = null;
+            }
+            LoadApplication(new App(action));
 
             return base.FinishedLaunching(app, options);
         }
+
+        public override bool OpenUrl(UIApplication app, NSUrl url, NSDictionary options)
+        {
+            if (url?.IsFileUrl == true)
+            {
+                return App.OpenUrl(url.Path);
+            }
+            return false;
+        }
+
+        public override async void PerformActionForShortcutItem(UIApplication application, UIApplicationShortcutItem shortcutItem, UIOperationHandler completionHandler)
+        {
+            if (shortcutItem == null || string.IsNullOrEmpty(shortcutItem.Type))
+            {
+                return;
+            }
+            if (App.Accounts.Count == 0)
+            {
+                await App.InitializeData();
+            }
+            Xamarin.Essentials.MainThread.BeginInvokeOnMainThread(async () =>
+            {
+                var state = Xamarin.Forms.Shell.Current.CurrentState.Location;
+                var route = state.OriginalString;
+                var current = Xamarin.Forms.Shell.Current;
+                if (!route.StartsWith("//Bills"))
+                {
+                    await current.GoToAsync("//Bills");
+                }
+                else if (route.EndsWith("/Details") || route.StartsWith("//Bills/D_FAULT_AddBillPage"))
+                {
+                    return;
+                }
+                await current.GoToAsync("Details");
+            });
+        }
     }
 }

Billing/Billing.iOS/Base.lproj/InfoPlist.strings

@@ -1 +1,3 @@
-"CFBundleDisplayName" = "Billing";
+"CFBundleDisplayName" = "Billing";
+"BillingShortcutNew" = "Write a bill";
+"NSLocationWhenInUseUsageDescription" = "When "Save Location" is checked, the Billing app needs to access the location.";

Billing/Billing.iOS/Billing.iOS.csproj

@@ -14,8 +14,9 @@
     <AssemblyName>Billing.iOS</AssemblyName>
     <MtouchEnableSGenConc>true</MtouchEnableSGenConc>
     <MtouchHttpClientHandler>NSUrlSessionHandler</MtouchHttpClientHandler>
-    <ProvisioningType>automatic</ProvisioningType>
+    <ProvisioningType>manual</ProvisioningType>
     <LangVersion>9.0</LangVersion>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhoneSimulator' ">
     <DebugSymbols>true</DebugSymbols>
@@ -38,6 +39,7 @@
     <MtouchLink>None</MtouchLink>
     <MtouchArch>x86_64</MtouchArch>
     <CodesignKey>iPhone Distribution</CodesignKey>
+    <MtouchUseLlvm>true</MtouchUseLlvm>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|iPhone' ">
     <DebugSymbols>true</DebugSymbols>
@@ -64,6 +66,9 @@
     <CodesignKey>iPhone Distribution</CodesignKey>
     <CodesignEntitlements>Entitlements.plist</CodesignEntitlements>
     <MtouchLink>SdkOnly</MtouchLink>
+    <MtouchInterpreter>-all</MtouchInterpreter>
+    <MtouchUseLlvm>true</MtouchUseLlvm>
+    <OptimizePNGs>true</OptimizePNGs>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="Definition.cs" />
@@ -91,6 +96,19 @@
     <BundleResource Include="Resources\OpenSans-SemiBold.ttf" />
     <Compile Include="Renderers\BlurryPanelRenderer.cs" />
     <Compile Include="Renderers\SegmentedControlRenderer.cs" />
+    <Compile Include="Renderers\OptionPickerRenderer.cs" />
+    <BundleResource Include="Resources\share.png" />
+    <BundleResource Include="Resources\share%402x.png" />
+    <BundleResource Include="Resources\share%403x.png" />
+    <BundleResource Include="Resources\sync.png" />
+    <BundleResource Include="Resources\sync%402x.png" />
+    <BundleResource Include="Resources\sync%403x.png" />
+    <BundleResource Include="Resources\location.png" />
+    <BundleResource Include="Resources\location%402x.png" />
+    <BundleResource Include="Resources\location%403x.png" />
+    <BundleResource Include="Resources\pin.png" />
+    <BundleResource Include="Resources\pin%402x.png" />
+    <BundleResource Include="Resources\pin%403x.png" />
   </ItemGroup>
   <ItemGroup>
     <ImageAsset Include="Assets.xcassets\AppIcon.appiconset\Contents.json">
@@ -165,15 +183,14 @@
     <Reference Include="System.Xml.Linq" />
     <Reference Include="Xamarin.iOS" />
     <Reference Include="System.Numerics" />
-    <Reference Include="System.Numerics.Vectors" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Microcharts.Forms">
+    <PackageReference Include="Microcharts.Forms" Version="0.9.5.9" />
-      <Version>0.9.5.9</Version>
-    </PackageReference>
     <PackageReference Include="SkiaSharp.Views.Forms" Version="2.80.3" />
-    <PackageReference Include="Xamarin.Forms" Version="5.0.0.2337" />
+    <PackageReference Include="sqlite-net-pcl" Version="1.8.116" />
-    <PackageReference Include="Xamarin.Essentials" Version="1.7.1" />
+    <PackageReference Include="Xamarin.Forms" Version="5.0.0.2401" />
+    <PackageReference Include="Xamarin.Essentials" Version="1.7.2" />
+    <PackageReference Include="Xamarin.Forms.Maps" Version="5.0.0.2401" />
   </ItemGroup>
   <ItemGroup>
     <BundleResource Include="Resources\dollar.png" />

Billing/Billing.iOS/Definition.cs

@@ -2,13 +2,9 @@
 {
     public static partial class Definition
     {
-        public static partial (string main, long build) GetVersion() => (
+        public const string RegularFontFamily = "OpenSans-Regular";
-            Foundation.NSBundle.MainBundle.ObjectForInfoDictionary("CFBundleShortVersionString").ToString(),
+        public const string SemiBoldFontFamily = "OpenSans-SemiBold";
-            int.Parse(Foundation.NSBundle.MainBundle.ObjectForInfoDictionary("CFBundleVersion").ToString())
+        public const string BoldFontFamily = "OpenSans-Bold";
-            );
+        public const string BrandsFontFamily = "FontAwesome6Brands-Regular";
-        public static partial string GetRegularFontFamily() => "OpenSans-Regular";
-        public static partial string GetSemiBoldFontFamily() => "OpenSans-SemiBold";
-        public static partial string GetBoldFontFamily() => "OpenSans-Bold";
-        public static partial string GetBrandsFontFamily() => "FontAwesome6Brands-Regular";
     }
 }

Billing/Billing.iOS/Info.plist

@@ -41,11 +41,68 @@
 		<string>OpenSans-Regular.ttf</string>
 		<string>OpenSans-SemiBold.ttf</string>
 	</array>
+	<key>CFBundleDocumentTypes</key>
+	<array>
+		<dict>
+			<key>CFBundleTypeName</key>
+			<string>SQLite Database</string>
+			<key>LSItemContentTypes</key>
+			<array>
+				<string>org.tsanie.billing.db3</string>
+				<string>public.database</string>
+			</array>
+			<key>CFBundleTypeIconFiles</key>
+			<array>
+				<string>Assets.xcassets/AppIcon.appiconset/Icon180</string>
+			</array>
+			<key>LSHandlerRank</key>
+			<string>Alternate</string>
+		</dict>
+	</array>
+	<key>UTExportedTypeDeclarations</key>
+	<array>
+		<dict>
+			<key>UTTypeConformsTo</key>
+			<array>
+				<string>public.data</string>
+			</array>
+			<key>UTTypeDescription</key>
+			<string>SQLite Database</string>
+			<key>UTTypeIdentifier</key>
+			<string>org.tsanie.billing.db3</string>
+			<key>UTTypeTagSpecification</key>
+			<dict>
+				<key>public.filename-extension</key>
+				<string>db3</string>
+				<key>public.mime-type</key>
+				<string>application/vnd.sqlite3</string>
+			</dict>
+		</dict>
+	</array>
+	<key>CFBundleVersion</key>
+	<string>21</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.2.411</string>
+	<key>LSApplicationQueriesSchemes</key>
+	<array>
+		<string>mailto</string>
+	</array>
 	<key>UIFileSharingEnabled</key>
 	<true/>
-	<key>CFBundleVersion</key>
+	<key>LSSupportsOpeningDocumentsInPlace</key>
-	<string>8</string>
+	<true/>
-	<key>CFBundleShortVersionString</key>
+	<key>NSLocationWhenInUseUsageDescription</key>
-	<string>0.8.309</string>
+	<string>When &quot;Save Location&quot; is checked, the Billing app needs to access the location.</string>
+	<key>UIApplicationShortcutItems</key>
+	<array>
+		<dict>
+			<key>UIApplicationShortcutItemIconType</key>
+			<string>UIApplicationShortcutIconTypeCompose</string>
+			<key>UIApplicationShortcutItemTitle</key>
+			<string>BillingShortcutNew</string>
+			<key>UIApplicationShortcutItemType</key>
+			<string>newbill</string>
+		</dict>
+	</array>
 </dict>
 </plist>

Billing/Billing.iOS/Renderers/BillingPageRenderer.cs

@@ -55,7 +55,7 @@ namespace Billing.iOS.Renderers
             base.ViewDidAppear(animated);
             if (Element is BillingPage page)
             {
-                page.OnLoaded();
+                page.TriggerLoad();
             }
         }
     }

Billing/Billing.iOS/Renderers/OptionDatePickerRenderer.cs

@@ -14,9 +14,10 @@ namespace Billing.iOS.Renderers
             base.OnElementChanged(e);
 
             var control = Control;
-            if (control != null)
+            if (e.NewElement != null && control != null)
             {
                 control.BorderStyle = UITextBorderStyle.None;
+                control.TextAlignment = UITextAlignment.Center;
             }
         }
     }

Billing/Billing.iOS/Renderers/OptionPickerRenderer.cs

@@ -0,0 +1,46 @@
+using System.ComponentModel;
+using Billing.iOS.Renderers;
+using Billing.UI;
+using UIKit;
+using Xamarin.Forms;
+using Xamarin.Forms.Platform.iOS;
+
+[assembly: ExportRenderer(typeof(OptionPicker), typeof(OptionPickerRenderer))]
+namespace Billing.iOS.Renderers
+{
+    public class OptionPickerRenderer : PickerRenderer
+    {
+        protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
+        {
+            base.OnElementPropertyChanged(sender, e);
+
+            if (e.PropertyName == nameof(OptionPicker.BorderStyle))
+            {
+                var control = Control;
+                if (control != null && Element is OptionPicker picker)
+                {
+                    control.BorderStyle = picker.BorderStyle switch
+                    {
+                        BorderStyle.RoundedRect => UITextBorderStyle.RoundedRect,
+                        _ => UITextBorderStyle.None
+                    };
+                }
+            }
+        }
+
+        protected override void OnElementChanged(ElementChangedEventArgs<Picker> e)
+        {
+            base.OnElementChanged(e);
+
+            var control = Control;
+            if (control != null && e.NewElement is OptionPicker picker)
+            {
+                control.BorderStyle = picker.BorderStyle switch
+                {
+                    BorderStyle.RoundedRect => UITextBorderStyle.RoundedRect,
+                    _ => UITextBorderStyle.None
+                };
+            }
+        }
+    }
+}

Billing/Billing.iOS/Renderers/SegmentedControlRenderer.cs

@@ -92,7 +92,7 @@ namespace Billing.iOS.Renderers
         {
             //var color = Element.SelectedTextColor;
             //UIColor c = color == default ? UIColor.LabelColor : color.ToUIColor();
-            UIColor c = UIColor.LabelColor;
+            UIColor c = UIColor.Label;
             var attribute = new UITextAttributes
             {
                 TextColor = c
@@ -112,7 +112,7 @@ namespace Billing.iOS.Renderers
                 //var tintColor = element.TintColor;
                 //if (tintColor == default)
                 //{
-                return UIColor.SystemGray6Color;
+                return UIColor.SystemGray6;
                 //}
                 //else
                 //{
@@ -124,7 +124,7 @@ namespace Billing.iOS.Renderers
                 //var disabledColor = element.DisabledColor;
                 //if (disabledColor == default)
                 //{
-                return UIColor.SecondaryLabelColor;
+                return UIColor.SecondaryLabel;
                 //}
                 //else
                 //{