Isolate the TemplatedView check inside Platform.cs to just RadioButton until we can provide a more generalized fix (#13279)

* UI Test

* - Hack fix for now

* - fiix UI Test wording

* - apply to UWP

* - add UI Test for RB Templates

* - fix categories

Xamarin.Forms.ControlGallery.Android/_12484CustomRenderer.cs

@@ -18,7 +18,19 @@ namespace Xamarin.Forms.ControlGallery.Android
         {
             base.OnElementChanged(e);
 
-            Console.WriteLine("Issue12484 Test passed.");
+			if(e.NewElement.Children[0] is Issue12484CustomView.Issue12484Template t &&
+				t.Content is StackLayout g)
+			{
+				var label = new Label
+				{
+					AutomationId = "Success",
+					Text = "Success",
+					HorizontalOptions = LayoutOptions.Center,
+					VerticalOptions = LayoutOptions.Center
+				};
+
+				g.Children.Add(label);
+			}
         }
     }
 }

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue12484.xaml.cs

@@ -49,17 +49,16 @@ namespace Xamarin.Forms.Controls.Issues
 		{
 			public Issue12484Template()
 			{
-				var label = new Label
+				var content = new StackLayout()
 				{
-					AutomationId = "Success",
-					Text = "If this text appear, the test has passed.",
-					HorizontalOptions = LayoutOptions.Center,
-					VerticalOptions = LayoutOptions.Center
+					Children =
+					{
+						new Label()
+						{
+							Text = "If a label with text `Success` does not show up this test has failed"
+						}
+					}
 				};
-
-				var content = new Grid();
-				content.Children.Add(label);
-
 				Content = content;
 			}
 		}

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

@@ -0,0 +1,40 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Xamarin.Forms.CustomAttributes;
+using Xamarin.Forms.Internals;
+
+#if UITEST
+using Xamarin.Forms.Core.UITests;
+using Xamarin.UITest;
+using NUnit.Framework;
+#endif
+
+namespace Xamarin.Forms.Controls.Issues
+{
+#if UITEST
+	[Category(UITestCategories.RadioButton)]
+#endif
+
+	[Preserve(AllMembers = true)]
+	[Issue(IssueTracker.None, 0, "RadioButton: Template From Style", PlatformAffected.All)]
+	public class RadioButtonTemplateFromStyle : TestNavigationPage
+	{
+		protected override void Init()
+		{
+#if APP
+			PushAsync(new GalleryPages.RadioButtonGalleries.TemplateFromStyle());
+#endif
+		}
+
+#if UITEST
+		[Test]
+		public void ContentRenderers()
+		{
+			RunningApp.WaitForElement("A");
+			RunningApp.WaitForElement("B");
+			RunningApp.WaitForElement("C");
+		}
+#endif
+	}
+}

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

@@ -12,6 +12,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)CollectionViewGroupTypeIssue.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue11214.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue13109.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)RadioButtonTemplateFromStyle.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ShellWithCustomRendererDisabledAnimations.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)ShellFlyoutContent.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue4720.cs" />

Xamarin.Forms.Platform.Android/Platform.cs

@@ -339,11 +339,23 @@ namespace Xamarin.Forms.Platform.Android
 
 		internal static IVisualElementRenderer CreateRenderer(VisualElement element, Context context)
 		{
-			IVisualElementRenderer renderer = Registrar.Registered.GetHandlerForObject<IVisualElementRenderer>(element, context)
-				?? new DefaultRenderer(context);
+			IVisualElementRenderer renderer = null;
+
+			// temporary hack to fix the following issues
+			// https://github.com/xamarin/Xamarin.Forms/issues/13261
+			// https://github.com/xamarin/Xamarin.Forms/issues/12484
+			if (element is RadioButton tv && tv.ResolveControlTemplate() != null)
+			{
+				renderer = new DefaultRenderer(context);
+			}
+			
+			if (renderer == null)
+			{
+				renderer = Registrar.Registered.GetHandlerForObject<IVisualElementRenderer>(element, context)
+					?? new DefaultRenderer(context);
+			}
 
 			renderer.SetElement(element);
-
 			return renderer;
 		}
 

Xamarin.Forms.Platform.UAP/Platform.cs

@@ -45,7 +45,10 @@ namespace Xamarin.Forms.Platform.UWP
 
 			IVisualElementRenderer renderer = null;
 
-			if (element is TemplatedView tv && tv.ResolveControlTemplate() != null)
+			// temporary hack to fix the following issues
+			// https://github.com/xamarin/Xamarin.Forms/issues/13261
+			// https://github.com/xamarin/Xamarin.Forms/issues/12484
+			if (element is RadioButton tv && tv.ResolveControlTemplate() != null)
 			{
 				renderer = new DefaultRenderer();
 			}

Xamarin.Forms.Platform.iOS/Platform.cs

@@ -222,9 +222,21 @@ namespace Xamarin.Forms.Platform.iOS
 
 		public static IVisualElementRenderer CreateRenderer(VisualElement element)
 		{
-			IVisualElementRenderer renderer = Internals.Registrar.Registered.GetHandlerForObject<IVisualElementRenderer>(element)
-				?? new DefaultRenderer();
-						
+			IVisualElementRenderer renderer = null;
+
+			// temporary hack to fix the following issues
+			// https://github.com/xamarin/Xamarin.Forms/issues/13261
+			// https://github.com/xamarin/Xamarin.Forms/issues/12484
+			if (element is RadioButton tv && tv.ResolveControlTemplate() != null)
+			{
+				renderer = new DefaultRenderer();
+			}
+
+			if (renderer == null)
+			{
+				renderer = Internals.Registrar.Registered.GetHandlerForObject<IVisualElementRenderer>(element) ?? new DefaultRenderer();
+			}
+
 			renderer.SetElement(element);
 
 			return renderer;