[Android] CarouselView: Fix position jump when tapping non-Start aligned Entry

src/Controls/src/Core/Handlers/Items/Android/MauiCarouselRecyclerView.cs

@@ -589,6 +589,34 @@ void ClearLayoutListener()
 			_carouselViewLayoutListener = null;
 		}
 
+		// https://github.com/dotnet/maui/issues/13323
+		// CarouselView is a full-page pager; child-initiated rectangle scroll requests
+		// (e.g. EditText cursor positioning) must not scroll the carousel.
+		public override bool RequestChildRectangleOnScreen(
+			global::Android.Views.View child,
+			global::Android.Graphics.Rect rect,
+			bool immediate)
+		{
+			return false;
+		}
+
+		// https://github.com/dotnet/maui/issues/13323
+		// base.RequestChildFocus preserves normal focus propagation, but it may
+		// start a focus-driven scroll from an otherwise idle CarouselView.
+		public override void RequestChildFocus(
+			global::Android.Views.View child,
+			global::Android.Views.View focused)
+		{
+			var wasIdleBeforeFocus = ScrollState == RecyclerView.ScrollStateIdle;
+
+			base.RequestChildFocus(child, focused);
+
+			if (wasIdleBeforeFocus && ScrollState != RecyclerView.ScrollStateIdle)
+			{
+				StopScroll();
+			}
+		}
+
 		protected override void OnMeasure(int widthMeasureSpec, int heightMeasureSpec)
 		{
 			// If the height or width are unbounded and the user is set to

src/Controls/src/Core/PublicAPI/net-android/PublicAPI.Unshipped.txt

@@ -1,4 +1,6 @@
 #nullable enable
 override Microsoft.Maui.Controls.Shapes.Shape.OnPropertyChanged(string? propertyName = null) -> void
+~override Microsoft.Maui.Controls.Handlers.Items.MauiCarouselRecyclerView.RequestChildFocus(Android.Views.View child, Android.Views.View focused) -> void
+~override Microsoft.Maui.Controls.Handlers.Items.MauiCarouselRecyclerView.RequestChildRectangleOnScreen(Android.Views.View child, Android.Graphics.Rect rect, bool immediate) -> bool
 ~override Microsoft.Maui.Controls.Handlers.Items.MauiRecyclerView<TItemsView, TAdapter, TItemsViewSource>.OnInterceptTouchEvent(Android.Views.MotionEvent e) -> bool
 ~override Microsoft.Maui.Controls.Handlers.Items.MauiRecyclerView<TItemsView, TAdapter, TItemsViewSource>.OnTouchEvent(Android.Views.MotionEvent e) -> bool

src/Controls/tests/TestCases.HostApp/Issues/Issue13323.cs

@@ -0,0 +1,126 @@
+namespace Maui.Controls.Sample.Issues;
+
+[Issue(IssueTracker.Github, 13323,
+	"CarouselView on Android does not work if HorizontalTextAlignment in Entry is not Start",
+	PlatformAffected.Android)]
+public class Issue13323 : ContentPage
+{
+	public Issue13323()
+	{
+		var items = Enumerable.Range(0, 5).ToArray();
+
+		var positionLabel = new Label
+		{
+			AutomationId = "PositionLabel",
+			Text = "Position:0",
+			HorizontalOptions = LayoutOptions.Center,
+		};
+
+		var carousel = new CarouselView
+		{
+			AutomationId = "CarouselView13323",
+			ItemsSource = items,
+			Loop = false,
+			HeightRequest = 250,
+			ItemTemplate = new DataTemplate(() =>
+			{
+				var label = new Label
+				{
+					HeightRequest = 100,
+					HorizontalOptions = LayoutOptions.Fill,
+					VerticalOptions = LayoutOptions.Start,
+					BackgroundColor = Colors.LightGray,
+					HorizontalTextAlignment = TextAlignment.Center,
+					VerticalTextAlignment = TextAlignment.Center,
+				};
+				label.SetBinding(Label.TextProperty, ".", stringFormat: "Item {0}");
+
+				var entry = new Entry
+				{
+					Placeholder = "Tap me",
+					HorizontalTextAlignment = TextAlignment.Center,
+					HorizontalOptions = LayoutOptions.FillAndExpand,
+				};
+				entry.SetBinding(AutomationIdProperty, ".", stringFormat: "CenterEntry_{0}");
+
+				return new VerticalStackLayout
+				{
+					Children = { label, entry }
+				};
+			})
+		};
+
+		var goToItem2Button = new Button
+		{
+			AutomationId = "GoToItem2",
+			Text = "Go to Item 2",
+		};
+		goToItem2Button.Clicked += (s, e) => carousel.ScrollTo(2, animate: false);
+
+		carousel.PositionChanged += (s, e) =>
+		{
+			positionLabel.Text = $"Position:{carousel.Position}";
+		};
+
+		var loopPositionLabel = new Label
+		{
+			AutomationId = "LoopPositionLabel",
+			Text = "LoopPosition:0",
+			HorizontalOptions = LayoutOptions.Center,
+		};
+
+		var loopCarousel = new CarouselView
+		{
+			AutomationId = "LoopCarouselView13323",
+			ItemsSource = items,
+			Loop = true,
+			HeightRequest = 250,
+			ItemTemplate = new DataTemplate(() =>
+			{
+				var label = new Label
+				{
+					HeightRequest = 100,
+					HorizontalOptions = LayoutOptions.Fill,
+					VerticalOptions = LayoutOptions.Start,
+					BackgroundColor = Colors.LightGray,
+					HorizontalTextAlignment = TextAlignment.Center,
+					VerticalTextAlignment = TextAlignment.Center,
+				};
+				label.SetBinding(Label.TextProperty, ".", stringFormat: "Loop Item {0}");
+
+				var entry = new Entry
+				{
+					Placeholder = "Tap me",
+					HorizontalTextAlignment = TextAlignment.Center,
+					HorizontalOptions = LayoutOptions.FillAndExpand,
+				};
+				entry.SetBinding(AutomationIdProperty, ".", stringFormat: "LoopCenterEntry_{0}");
+
+				return new VerticalStackLayout
+				{
+					Children = { label, entry }
+				};
+			})
+		};
+
+		var loopGoToItem2Button = new Button
+		{
+			AutomationId = "LoopGoToItem2",
+			Text = "Go to Loop Item 2",
+		};
+		loopGoToItem2Button.Clicked += (s, e) => loopCarousel.ScrollTo(2, animate: false);
+
+		loopCarousel.PositionChanged += (s, e) =>
+		{
+			loopPositionLabel.Text = $"LoopPosition:{loopCarousel.Position}";
+		};
+
+		Content = new ScrollView
+		{
+			Content = new VerticalStackLayout
+			{
+				Children = { positionLabel, goToItem2Button, carousel, loopPositionLabel, loopGoToItem2Button, loopCarousel }
+			}
+		};
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue13323.cs

@@ -0,0 +1,61 @@
+using Microsoft.Maui.TestCases.Tests;
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.AppUITests.Issues;
+
+public class Issue13323 : _IssuesUITest
+{
+	public Issue13323(TestDevice device) : base(device) { }
+
+	public override string Issue => "CarouselView on Android does not work if HorizontalTextAlignment in Entry is not Start";
+
+	[Test]
+	[Category(UITestCategories.CarouselView)]
+	public void CarouselView_EntryTap_DoesNotChangePosition()
+	{
+		App.WaitForElement("CarouselView13323", timeout: TimeSpan.FromSeconds(30));
+		App.WaitForElement("PositionLabel", timeout: TimeSpan.FromSeconds(15));
+
+		App.Tap("GoToItem2");
+		App.WaitForElement("CenterEntry_2", timeout: TimeSpan.FromSeconds(10));
+
+		var positionBefore = App.FindElement("PositionLabel").GetText();
+		Assert.That(positionBefore, Is.EqualTo("Position:2"), $"CarouselView did not reach Position:2 before tapping Entry. Actual: {positionBefore}");
+
+		App.Tap("CenterEntry_2");
+
+		var positionAfter = App.FindElement("PositionLabel").GetText();
+		Assert.That(positionAfter, Is.EqualTo("Position:2"), $"CarouselView jumped after tapping Center-aligned Entry. Before: {positionBefore}, After: {positionAfter}");
+
+		App.DismissKeyboard();
+#if ANDROID
+		App.WaitForKeyboardToHide();
+#endif
+	}
+
+	[Test]
+	[Category(UITestCategories.CarouselView)]
+	public void CarouselView_Loop_EntryTap_DoesNotChangePosition()
+	{
+		App.WaitForElement("LoopCarouselView13323", timeout: TimeSpan.FromSeconds(30));
+		App.WaitForElement("LoopPositionLabel", timeout: TimeSpan.FromSeconds(15));
+
+		App.Tap("LoopGoToItem2");
+		App.WaitForElement("LoopCenterEntry_2", timeout: TimeSpan.FromSeconds(10));
+
+		var positionBefore = App.FindElement("LoopPositionLabel").GetText();
+		Assert.That(positionBefore, Is.EqualTo("LoopPosition:2"), $"Loop CarouselView did not reach LoopPosition:2 before tapping Entry. Actual: {positionBefore}");
+
+		App.Tap("LoopCenterEntry_2");
+
+		var positionAfter = App.FindElement("LoopPositionLabel").GetText();
+		Assert.That(positionAfter, Is.EqualTo("LoopPosition:2"), $"CarouselView (Loop=true) jumped after tapping Center-aligned Entry. Before: {positionBefore}, After: {positionAfter}");
+
+		App.DismissKeyboard();
+#if ANDROID
+		App.WaitForKeyboardToHide();
+#endif
+	}
+}