[Android] Fix swipe conflict between SwipeView and TabbedPage (#11358)

* Added repro sample

* Updated sample

* Added instructions to the sample

* Fix the issue

Co-authored-by: Samantha Houts <samhouts@users.noreply.github.com>

fixes #11314

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue11314.cs

@@ -0,0 +1,118 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using Xamarin.Forms.CustomAttributes;
+using Xamarin.Forms.Internals;
+
+#if UITEST
+using Xamarin.UITest;
+using NUnit.Framework;
+using Xamarin.Forms.Core.UITests;
+#endif
+
+namespace Xamarin.Forms.Controls.Issues
+{
+#if UITEST
+	[Category(UITestCategories.SwipeView)]
+#endif
+	[Preserve(AllMembers = true)]
+	[Issue(IssueTracker.Github, 11314,
+		"Cannot swipe the swipeview inside a Listview[Bug]",
+		PlatformAffected.Android)]
+	public class Issue11314 : TestTabbedPage
+	{
+		public Issue11314()
+		{
+#if APP
+			Device.SetFlags(new List<string> { ExperimentalFlags.SwipeViewExperimental });
+#endif
+		}
+
+		protected override void Init()
+		{
+			Title = "Issue 11314";
+
+			var page1 = new Issue11314Page("Page 1");
+			var page2 = new Issue11314Page("Page 2");
+
+			Children.Add(page1);
+			Children.Add(page2);
+		}
+	}
+
+	public class Issue11314Page : ContentPage
+	{
+		public Issue11314Page(string title)
+		{
+			Title = title;
+
+			for (int i = 0; i < 5; i++)
+			{
+				Items.Add(DateTime.Now.ToString());
+			}
+
+			var layout = new StackLayout
+			{
+				Padding = 0
+			};
+
+			var instructions = new Label
+			{
+				Padding = 12,
+				BackgroundColor = Color.Black,
+				TextColor = Color.White,
+				Text = "Try to open the SwipeView doing swipe, if you can open it, the test has passed."
+			};
+
+			var listView = new ListView()
+			{
+				HorizontalOptions = LayoutOptions.FillAndExpand,
+				HasUnevenRows = true,
+				ItemsSource = Items,
+				ItemTemplate = new DataTemplate(() =>
+				{
+					var itemLayout = new StackLayout();
+
+					var swipeView = new SwipeView();
+
+					var content = new Grid
+					{
+						HeightRequest = 80,
+						BackgroundColor = Color.LightGray
+					};
+
+					content.Children.Add(new Label
+					{
+						HorizontalOptions = LayoutOptions.Center,
+						VerticalOptions = LayoutOptions.Center,
+						Text = "Swipe to Left"
+					});
+
+					swipeView.Content = content;
+
+					var swipeItem = new SwipeItem
+					{
+						BackgroundColor = Color.Red,
+						Text = "Text"
+					};
+
+					swipeView.RightItems = new SwipeItems
+					{
+						swipeItem
+					};
+
+					itemLayout.Children.Add(swipeView);
+
+					return new ViewCell { View = itemLayout };
+				})
+			};
+
+			layout.Children.Add(instructions);
+			layout.Children.Add(listView);
+
+			Content = layout;
+		}
+
+		public ObservableCollection<string> Items = new ObservableCollection<string>();
+	}
+}

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

@@ -1465,6 +1465,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Issue11291.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue11244.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue11272.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Issue11314.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue11413.xaml.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue11563.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue11547.xaml.cs" />

Xamarin.Forms.Platform.Android/Renderers/SwipeViewRenderer.cs

@@ -15,6 +15,7 @@
 #endif
 using Android.Views;
 using Xamarin.Forms.Internals;
+using Xamarin.Forms.Platform.Android.AppCompat;
 using Xamarin.Forms.PlatformConfiguration.AndroidSpecific;
 using APointF = Android.Graphics.PointF;
 using ATextAlignment = Android.Views.TextAlignment;
@@ -34,6 +35,7 @@ public class SwipeViewRenderer : ViewRenderer<SwipeView, AView>
 		readonly Dictionary<ISwipeItem, object> _swipeItems;
 		readonly Context _context;
 		View _scrollParent;
+		FormsViewPager _viewPagerParent;
 		AView _contentView;
 		LinearLayoutCompat _actionView;
 		SwipeTransitionMode _swipeTransitionMode;
@@ -173,6 +175,9 @@ protected override void OnAttachedToWindow()
 		{
 			base.OnAttachedToWindow();
 
+			if (Control != null && Control.Parent != null && _viewPagerParent == null)
+				_viewPagerParent = Control.Parent.GetParentOfType<FormsViewPager>();
+
 			if (Element != null && _scrollParent == null)
 			{
 				_scrollParent = Element.FindParentOfType<ScrollView>();
@@ -506,6 +511,7 @@ bool ProcessTouchMove(APointF point)
 			if (!ValidateSwipeDirection() || _isResettingSwipe)
 				return false;
 
+			EnableParentGesture(false);
 			_swipeOffset = GetSwipeOffset(_initialPoint, point);
 			UpdateIsOpen(_swipeOffset != 0);
 
@@ -523,6 +529,8 @@ bool ProcessTouchUp()
 		{
 			_isTouchDown = false;
 
+			EnableParentGesture(true);
+
 			if (!_isSwiping)
 				return false;
 
@@ -1321,6 +1329,12 @@ void ExecuteSwipeItem(ISwipeItem item)
 				item.OnInvoked();
 		}
 
+		void EnableParentGesture(bool isGestureEnabled)
+		{
+			if (_viewPagerParent != null)
+				_viewPagerParent.EnableGesture = isGestureEnabled;
+		}
+
 		void OnOpenRequested(object sender, OpenSwipeEventArgs e)
 		{
 			if (_contentView == null)