Added Antialias support in the Android shapes Paint (#11874) fixes #11858

Author: jsuarezruiz

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue11858.cs

@@ -0,0 +1,61 @@
+using Xamarin.Forms.CustomAttributes;
+using Xamarin.Forms.Internals;
+using Xamarin.Forms.Shapes;
+using System.Collections.Generic;
+
+
+#if UITEST
+using Xamarin.UITest;
+using NUnit.Framework;
+using Xamarin.Forms.Core.UITests;
+#endif
+
+namespace Xamarin.Forms.Controls.Issues
+{
+	[Preserve(AllMembers = true)]
+	[Issue(IssueTracker.Github, 11858, "Ellipse is not antialised",
+		PlatformAffected.Android)]
+#if UITEST
+	[NUnit.Framework.Category(UITestCategories.Shape)]
+#endif
+	public class Issue11858 : TestContentPage
+	{
+		public Issue11858()
+		{
+#if APP
+		Device.SetFlags(new List<string> { ExperimentalFlags.ShapesExperimental });
+#endif
+		}
+
+		protected override void Init()
+		{
+			Title = "Issue 11858";
+
+			var layout = new StackLayout();
+
+			var instructions = new Label
+			{
+				Padding = 12,
+				BackgroundColor = Color.Black,
+				TextColor = Color.White,
+				Text = "If despite scaling the ellipse looks sharp, the test has passed."
+			};
+
+			var ellipse = new Ellipse
+			{
+				HorizontalOptions = LayoutOptions.Start,
+				HeightRequest = 100,
+				WidthRequest = 100,
+				Scale = 2,
+				StrokeThickness = 12,
+				Stroke = Brush.Red,
+				Margin = new Thickness(100, 100, 0, 0)
+			};
+
+			layout.Children.Add(instructions);
+			layout.Children.Add(ellipse);
+
+			Content = layout;
+		}
+	}
+}

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems

@@ -1487,6 +1487,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Issue11737.xaml.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue11764.xaml.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue11573.xaml.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Issue11858.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue9210.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue11865.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue11653.xaml.cs" />

Xamarin.Forms.Platform.Android/Shapes/ShapeRenderer.cs

@@ -196,7 +196,8 @@ public class ShapeView : AView
 
         public ShapeView(Context context) : base(context)
         {
-            _drawable = new ShapeDrawable(null);
+			_drawable = new ShapeDrawable(null);
+            _drawable.Paint.AntiAlias = true;
 
             _density = Resources.DisplayMetrics.Density;