[Android] Fix crash starting the swipe on SwipeView inside CollectionView

src/Controls/tests/TestCases.HostApp/Issues/Issue26328.xaml

@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<controls:TestContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+			       xmlns:controls="clr-namespace:Maui.Controls.Sample.Issues"
+             xmlns:cmp="clr-namespace:Microsoft.Maui.Controls.Compatibility;assembly=Microsoft.Maui.Controls"
+             x:Class="Maui.Controls.Sample.Issues.Issue26328">
+  <ContentPage.Content>
+    <CollectionView AutomationId="TestCollectionView" 
+                    ItemsSource="{Binding ItemList}">
+      <CollectionView.ItemTemplate>
+        <DataTemplate x:DataType="controls:Issue26328ItemModel">
+          <SwipeView>
+            <Border Padding="10,30">
+              <Label>
+                <Label.Text>
+                  <MultiBinding Converter="{controls:Issue26328TestConverter}">
+                    <Binding x:DataType="controls:Issue26328ItemModel" Path="Id" />
+                    <Binding x:DataType="controls:Issue26328ItemModel" Path="Title" />
+                  </MultiBinding>
+                </Label.Text>
+              </Label>
+            </Border>
+            <SwipeView.RightItems>
+              <SwipeItems Mode="Execute">
+                <SwipeItemView Command="{Binding SwipeCommand}">
+                  <ContentView Padding="10"
+                               HorizontalOptions="End"
+                               VerticalOptions="Center">
+                    <Label Text="X" />
+                  </ContentView>
+                </SwipeItemView>
+              </SwipeItems>
+            </SwipeView.RightItems>
+          </SwipeView>
+        </DataTemplate>
+      </CollectionView.ItemTemplate>
+    </CollectionView>
+  </ContentPage.Content>
+</controls:TestContentPage>

src/Controls/tests/TestCases.HostApp/Issues/Issue26328.xaml.cs

@@ -0,0 +1,99 @@
+using System.Collections.ObjectModel;
+using System.Globalization;
+
+namespace Maui.Controls.Sample.Issues
+{
+	[Issue(IssueTracker.Github, 26328, "SwipeView causes Java.Lang.IllegalArgumentException: Cannot add a null child view to a ViewGroup", PlatformAffected.Android)]
+	public partial class Issue26328 : TestContentPage
+	{
+		public Issue26328()
+		{
+			InitializeComponent();
+		}
+
+		protected override void Init()
+		{
+			BindingContext = new Issue26328ViewModel();
+		}
+	}
+
+	public class Issue26328ItemModel
+	{
+		public int Id { get; set; }
+		public string Title { get; set; }
+
+		public Issue26328ItemModel(int i)
+		{
+			Id = i;
+			Title = "Hello";
+		}
+
+		public Command SwipeCommand =>
+			new Command(DeleteMessage);
+
+		void DeleteMessage()
+		{
+#pragma warning disable CS0618 // Type or member is obsolete
+			MessagingCenter.Send<Issue26328ItemModel, Issue26328RemoveMessage>(this, "Swipe", new Issue26328RemoveMessage(this));
+#pragma warning disable CS0618 // Type or member is obsolete
+		}
+	}
+
+	public class Issue26328RemoveMessage
+	{
+		public Issue26328ItemModel Item { get; }
+
+		public Issue26328RemoveMessage(Issue26328ItemModel item)
+		{
+			Item = item;
+		}
+	}
+
+	public class Issue26328ViewModel
+	{
+		public ObservableCollection<Issue26328ItemModel> ItemList { get; set; }
+
+		public Issue26328ViewModel()
+		{
+#pragma warning disable CS0618 // Type or member is obsolete
+			MessagingCenter.Subscribe<Issue26328ItemModel, Issue26328RemoveMessage>(this, "Swipe", (sender, arg) => RemoveItem(arg.Item));
+#pragma warning disable CS0618 // Type or member is obsolete
+			ItemList = [];
+			for (var i = 0; i < 200; ++i)
+			{
+				ItemList.Add(new Issue26328ItemModel(i));
+			}
+		}
+
+		void RemoveItem(Issue26328ItemModel item)
+		{
+			ItemList.Remove(item);
+			GC.Collect();
+		}
+	}
+
+	[AcceptEmptyServiceProvider]
+	public class Issue26328TestConverter : IMultiValueConverter, IMarkupExtension
+	{
+		public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
+		{
+			if (values[0] == null || values[1] == null)
+			{
+				return null;
+			}
+			var id = (int)values[0];
+			var title = (string)values[1];
+			return $"{title} - {id}";
+		}
+
+		public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
+		{
+			throw new NotImplementedException();
+		}
+
+		public object ProvideValue(IServiceProvider serviceProvider)
+		{
+			return this;
+		}
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue26328.cs

@@ -0,0 +1,31 @@
+#if ANDROID // Crash only happened on Android
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue26328 : _IssuesUITest
+	{ 
+		public override string Issue => "SwipeView causes Java.Lang.IllegalArgumentException: Cannot add a null child view to a ViewGroup";
+
+		public Issue26328(TestDevice device)
+		: base(device)
+		{ }
+
+		[Test]
+		[Category(UITestCategories.SwipeView)]
+		public void NoCrashRemovingSwipeItems()
+		{
+			App.WaitForElement("TestCollectionView");
+
+			for(int i = 0; i < 10; i++)
+			{
+				App.SwipeRightToLeft();
+				App.ScrollDown("TestCollectionView", ScrollStrategy.Gesture, swipePercentage: 0.2);
+				App.ScrollUp("TestCollectionView", ScrollStrategy.Gesture, swipePercentage: 0.2);
+			}
+		}
+	}
+}
+#endif

src/Core/src/Handlers/SwipeItemView/SwipeItemViewHandler.Android.cs

@@ -57,6 +57,7 @@ public static void MapVisibility(ISwipeItemViewHandler handler, ISwipeItemView v
 		protected override void DisconnectHandler(ContentViewGroup platformView)
 		{
 			// If we're being disconnected from the xplat element, then we should no longer be managing its children
+			platformView.CrossPlatformLayout = null;
 			platformView.RemoveAllViews();
 			base.DisconnectHandler(platformView);
 		}

src/Core/src/Platform/Android/MauiSwipeView.cs

@@ -526,7 +526,7 @@ float GetSwipeContentOffset()
 
 		void UpdateSwipeItems()
 		{
-			if (_contentView == null || _actionView != null)
+			if (_contentView == null || _contentView.IsDisposed() || _actionView != null)
 				return;
 
 			ISwipeItems? items = GetSwipeItemsByDirection();
@@ -545,22 +545,25 @@ void UpdateSwipeItems()
 
 			foreach (var item in items)
 			{
-				AView swipeItem = item.ToPlatform(MauiContext);
+				AView? swipeItem = item?.ToPlatform(MauiContext);
 
-				if (item is ISwipeItemView formsSwipeItemView)
+				if (swipeItem is not null)
 				{
-					_actionView.AddView(swipeItem);
-					UpdateSwipeItemViewLayout(formsSwipeItemView);
-					_swipeItems.Add(formsSwipeItemView, swipeItem);
-				}
-				else if (item is ISwipeItemMenuItem menuItem)
-				{
-					_actionView.AddView(swipeItem);
-					_swipeItems.Add(item, swipeItem);
-				}
+					if (item is ISwipeItemView formsSwipeItemView)
+					{
+						_actionView.AddView(swipeItem);
+						UpdateSwipeItemViewLayout(formsSwipeItemView);
+						_swipeItems.Add(formsSwipeItemView, swipeItem);
+					}
+					else if (item is ISwipeItemMenuItem menuItem)
+					{
+						_actionView.AddView(swipeItem);
+						_swipeItems.Add(item, swipeItem);
+					}
 
-				if (swipeItem != null)
-					swipeItems.Add(swipeItem);
+					if (swipeItem != null)
+						swipeItems.Add(swipeItem);
+				}
 			}
 
 			AddView(_actionView);