feature: Android renderers

Pixiview.Android/Renderers/CardViewRenderer.cs

@@ -1,6 +1,5 @@
 using Android.Content;
 using Android.Graphics;
-using Android.Views;
 using Pixiview.Droid.Renderers;
 using Pixiview.UI;
 using Xamarin.Forms;
@@ -11,8 +10,6 @@ namespace Pixiview.Droid.Renderers
 {
     public class CardViewRenderer : VisualElementRenderer<CardView>
     {
-        ViewOutlineProvider original;
-
         public CardViewRenderer(Context context) : base(context)
         {
         }
@@ -27,39 +24,19 @@ namespace Pixiview.Droid.Renderers
                 var radius = element.CornerRadius;
                 if (radius > 0)
                 {
-                    original = OutlineProvider;
-                    OutlineProvider = new CornerRadiusOutlineProvider(element, radius);
-                    ClipToOutline = true;
+                    //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;
+
+                    var drawable = new RoundCornerDrawable(radius * density);
+                    drawable.SetColorFilter(element.BackgroundColor.ToAndroid(), PorterDuff.Mode.Src);
+                    ((Android.Views.View)this).SetBackground(drawable);
                 }
             }
         }
-
-        protected override void OnDetachedFromWindow()
-        {
-            OutlineProvider = original;
-            base.OnDetachedFromWindow();
-        }
-
-        private class CornerRadiusOutlineProvider : ViewOutlineProvider
-        {
-            private readonly Element element;
-            private readonly float radius;
-
-            public CornerRadiusOutlineProvider(Element from, float r)
-            {
-                element = from;
-                radius = r;
-            }
-
-            public override void GetOutline(Android.Views.View view, Outline outline)
-            {
-                var scale = view.Resources.DisplayMetrics.Density;
-                var width = (double)element.GetValue(VisualElement.WidthProperty) * scale;
-                var height = (double)element.GetValue(VisualElement.HeightProperty) * scale;
-
-                var rect = new Rect(0, 0, (int)width, (int)height);
-                outline.SetRoundRect(rect, radius * scale);
-            }
-        }
     }
 }