[Android] InputTransparent="true" on a Layout breaks child controls - Fix

src/Controls/tests/TestCases.HostApp/Issues/Issue22289.xaml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Maui.Controls.Sample.Issues.Issue22289"
+             Title="Issue22289">
+    <Grid RowDefinitions="*,*,*">
+        <Grid InputTransparent="True" BackgroundColor="Red">
+            <Label Text="Grid with InputTransparent"/>
+            <Button AutomationId="button1" x:Name="Button1" VerticalOptions="Center" Text="Click me" IsVisible="False"/>
+        </Grid>
+        <Grid Grid.Row="1" BackgroundColor="Green">
+            <Label Text="Grid without InputTransparent"/>
+            <Button AutomationId="button2" x:Name="Button2" VerticalOptions="Center" Text="Click me" IsVisible="False"/>
+        </Grid>
+        <Button AutomationId="changeVisibilityButton" Grid.Row="2" Clicked="Button_Clicked" Text="Click" />
+    </Grid>
+</ContentPage>

src/Controls/tests/TestCases.HostApp/Issues/Issue22289.xaml.cs

@@ -0,0 +1,21 @@
+using Microsoft.Maui.Controls;
+using Microsoft.Maui.Controls.Xaml;
+
+namespace Maui.Controls.Sample.Issues;
+
+[XamlCompilation(XamlCompilationOptions.Compile)]
+[Issue(IssueTracker.Github, 22289, "InputTransparent=\"true\" on a Layout breaks child controls on Android", PlatformAffected.Android)]
+
+public partial class Issue22289 : ContentPage
+{
+	public Issue22289()
+	{
+		InitializeComponent();
+	}
+
+	void Button_Clicked(object sender, System.EventArgs e)
+	{
+		Button1.IsVisible = !Button1.IsVisible;
+		Button2.IsVisible = !Button2.IsVisible;
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue22289.cs

@@ -0,0 +1,24 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue22289 : _IssuesUITest
+	{
+		public override string Issue => "InputTransparent=\"true\" on a Layout breaks child controls on Android";
+		public Issue22289(TestDevice device) : base(device)
+		{
+		}
+
+		[Test]
+		public void ButtonsShouldBeVisible()
+		{
+			App.WaitForElement("changeVisibilityButton");
+			App.Click("changeVisibilityButton");
+
+			App.WaitForElement("button1");
+			App.WaitForElement("button2");
+		}
+	}
+}

src/Core/src/Handlers/Label/LabelHandler.Windows.cs

@@ -43,7 +43,6 @@ public static void MapBackground(ILabelHandler handler, ILabel label)
 
 		public static void MapOpacity(ILabelHandler handler, ILabel label)
 		{
-			handler.UpdateValue(nameof(IViewHandler.ContainerView));
 			handler.PlatformView.UpdateOpacity(label);
 			handler.ToPlatform().UpdateOpacity(label);
 		}

src/Core/src/Handlers/View/ViewHandler.cs

@@ -413,10 +413,21 @@ public static void MapInvalidateMeasure(IViewHandler handler, IView view, object
 		/// <param name="view">The associated <see cref="IView"/> instance.</param>
 		public static void MapContainerView(IViewHandler handler, IView view)
 		{
+			bool hasContainerOldValue = handler.HasContainer;
+
 			if (handler is ViewHandler viewHandler)
 				handler.HasContainer = viewHandler.NeedsContainer;
 			else
 				handler.HasContainer = view.NeedsContainer();
+
+			if(hasContainerOldValue != handler.HasContainer)
+			{
+				handler.UpdateValue(nameof(IView.Visibility));
+
+				#if WINDOWS
+				handler.UpdateValue(nameof(IView.Opacity));
+				#endif
+			}
 		}
 
 		/// <summary>