ui fix

Billing.Shared/UI/Converters.cs

@@ -14,6 +14,10 @@ namespace Billing.UI
         {
             if (value is DateTime date)
             {
+                if (date.Year <= 1900)
+                {
+                    return null;
+                }
                 return date.ToString(Resource.TitleDateFormat);
             }
             return value;

Billing.Shared/Views/BillPage.xaml.cs

@@ -12,11 +12,9 @@ namespace Billing.Views
 {
     public partial class BillPage : BillingPage
     {
-        private static readonly DateTime dateNow = DateTime.Today;
+        private static readonly BindableProperty SelectedDateProperty = Helper.Create<DateTime, BillPage>(nameof(SelectedDate), propertyChanged: OnSelectedDateChanged);
-
-        private static readonly BindableProperty SelectedDateProperty = Helper.Create<DateTime, BillPage>(nameof(SelectedDate), defaultValue: dateNow, propertyChanged: OnSelectedDateChanged);
         private static readonly BindableProperty BillsProperty = Helper.Create<List<UIBill>, BillPage>(nameof(Bills));
-        private static readonly BindableProperty NoBillsProperty = Helper.Create<bool, BillPage>(nameof(NoBills));
+        private static readonly BindableProperty NoBillsProperty = Helper.Create<bool, BillPage>(nameof(NoBills), defaultValue: true);
         private static readonly BindableProperty IncomeProperty = Helper.Create<decimal, BillPage>(nameof(Income));
         private static readonly BindableProperty SpendingProperty = Helper.Create<decimal, BillPage>(nameof(Spending));
         private static readonly BindableProperty BalanceProperty = Helper.Create<decimal, BillPage>(nameof(Balance));
@@ -46,6 +44,8 @@ namespace Billing.Views
         public Command EditBilling { get; }
         public Command DeleteBilling { get; }
 
+        private bool initialized;
+
         public BillPage()
         {
             TitleDateTap = new Command(OnTitleDateTapped);
@@ -54,8 +54,15 @@ namespace Billing.Views
             DeleteBilling = new Command(OnDeleteBilling);
 
             InitializeComponent();
+        }
 
-            billingDate.SetDateTime(dateNow);
+        public override void OnLoaded()
+        {
+            if (!initialized)
+            {
+                initialized = true;
+                billingDate.SetDateTime(DateTime.Today);
+            }
         }
 
         private void OnDateSelected(object sender, DateEventArgs e)
@@ -109,7 +116,10 @@ namespace Billing.Views
 
         private void TitlePicker_DateSelected(object sender, DateChangedEventArgs e)
         {
-            billingDate.SetDateTime(e.NewDate);
+            if (e.NewDate.Year > 1900)
+            {
+                billingDate.SetDateTime(e.NewDate);
+            }
         }
 
         private void OnTitleDateLongPressed()

Billing/Billing.Android/Billing.Android.csproj

@@ -85,6 +85,7 @@
     <Compile Include="Renderers\OptionEditorRenderer.cs" />
     <Compile Include="SplashActivity.cs" />
     <Compile Include="Renderers\TintImageButtonRenderer.cs" />
+    <Compile Include="Renderers\BillingPageRenderer.cs" />
   </ItemGroup>
   <ItemGroup>
     <AndroidAsset Include="Assets\fa-brands-400.ttf" />

Billing/Billing.Android/Renderers/BillingPageRenderer.cs

@@ -0,0 +1,25 @@
+using Android.Content;
+using Billing.Droid.Renderers;
+using Billing.UI;
+using Xamarin.Forms;
+using Xamarin.Forms.Platform.Android;
+
+[assembly: ExportRenderer(typeof(BillingPage), typeof(BillingPageRenderer))]
+namespace Billing.Droid.Renderers
+{
+    public class BillingPageRenderer : PageRenderer
+    {
+        public BillingPageRenderer(Context context) : base(context)
+        {
+        }
+
+        protected override void OnAttachedToWindow()
+        {
+            base.OnAttachedToWindow();
+            if (Element is BillingPage page)
+            {
+                page.OnLoaded();
+            }
+        }
+    }
+}