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feature: Android card view shadow effect

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This commit is contained in:
Tsanie Lily 2020-05-14 11:43:05 +08:00
parent 6235430ded
commit ac1e7dfd02
2 changed files with 52 additions and 10 deletions
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2
Pixiview.Android/Properties/AndroidManifest.xml
View File

@ -1,6 +1,6 @@
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionName="1.0.514" package="org.tsanie.pixiview" android:versionCode="4">
<uses-sdk android:minSdkVersion="25" android:targetSdkVersion="29" />
<uses-sdk android:minSdkVersion="25" android:targetSdkVersion="28" />
<application android:label="Pixiview" android:icon="@mipmap/icon" android:roundIcon="@mipmap/icon_round"></application>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
</manifest>

60
Pixiview.Android/Renderers/CardViewRenderer.cs
View File

@ -1,5 +1,7 @@
using Android.Content;
using System.ComponentModel;
using Android.Content;
using Android.Graphics;
using Android.Views;
using Pixiview.Droid.Renderers;
using Pixiview.UI;
using Xamarin.Forms;
@ -24,19 +26,59 @@ namespace Pixiview.Droid.Renderers
var radius = element.CornerRadius;
if (radius > 0)
{
//var scale = Resources.DisplayMetrics.Density;
//OutlineProvider = new CornerRadiusOutlineProvider(element, radius, scale);
//ClipToOutline = true;
var density = Resources.DisplayMetrics.Density;
Elevation = (float)(element.ShadowOffset.Height + 2) * density;
OutlineProvider = new CornerRadiusOutlineProvider(element, radius, density);
ClipToOutline = true;
var drawable = new RoundCornerDrawable(radius * density);
drawable.SetColorFilter(element.BackgroundColor.ToAndroid(), PorterDuff.Mode.Src);
((Android.Views.View)this).SetBackground(drawable);
//var drawable = new RoundCornerDrawable(radius * density);
//drawable.SetColorFilter(element.BackgroundColor.ToAndroid(), PorterDuff.Mode.Src);
//((Android.Views.View)this).SetBackground(drawable);
Elevation = (float)(element.ShadowOffset.Height + 2) * density;
}
}
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
var element = Element;
if (element == null)
{
return;
}
switch (e.PropertyName)
{
case nameof(CardView.ShadowOffset):
var density = Resources.DisplayMetrics.Density;
Elevation = (float)(element.ShadowOffset.Height + 2) * density;
break;
}
}
class CornerRadiusOutlineProvider : ViewOutlineProvider
{
readonly Element element;
readonly float radius;
readonly float density;
public CornerRadiusOutlineProvider(Element formsElement, float radius, float density)
{
element = formsElement;
this.radius = radius * density;
this.density = density;
}
public override void GetOutline(Android.Views.View view, Outline outline)
{
float scale = density;
double width = (double)element.GetValue(VisualElement.WidthProperty) * scale;
double height = (double)element.GetValue(VisualElement.HeightProperty) * scale;
Rect rect = new Rect(0, 0, (int)width, (int)height);
outline.SetRoundRect(rect, radius);
}
}
}
}