Fix for Android - Dynamic Updates to CollectionView Header/Footer and Templates Are Not Displayed

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

@@ -14,16 +14,86 @@ public partial class StructuredItemsViewHandler<TItemsView> : ItemsViewHandler<T
 
 		public static void MapHeaderTemplate(StructuredItemsViewHandler<TItemsView> handler, StructuredItemsView itemsView)
 		{
+			handler.UpdateHeaderFooter(true);
 		}
 
 		public static void MapFooterTemplate(StructuredItemsViewHandler<TItemsView> handler, StructuredItemsView itemsView)
 		{
+			handler.UpdateHeaderFooter(false);
 		}
 
 		public static void MapItemsLayout(StructuredItemsViewHandler<TItemsView> handler, StructuredItemsView itemsView)
 			=> (handler.PlatformView as IMauiRecyclerView<TItemsView>)?.UpdateLayoutManager();
 
 		public static void MapItemSizingStrategy(StructuredItemsViewHandler<TItemsView> handler, StructuredItemsView itemsView)
 			=> (handler.PlatformView as IMauiRecyclerView<TItemsView>)?.UpdateAdapter();
+
+		void UpdateHeaderFooter(bool isHeader)
+		{
+			var recyclerView = PlatformView as IMauiRecyclerView<TItemsView>;
+			var adapter = (recyclerView as RecyclerView)?.GetAdapter();
+
+			if (recyclerView is null || adapter is null)
+			{
+				return;
+			}
+
+			bool hasHeaderOrFooter = isHeader
+			? (VirtualView.Header ?? VirtualView.HeaderTemplate) != null
+			: (VirtualView.Footer ?? VirtualView.FooterTemplate) != null;
+
+			bool exists = isHeader
+			? DoesHeaderExist(adapter)
+			: DoesFooterExist(adapter);
+
+			if (hasHeaderOrFooter && exists && IsDynamicChange())
+			{
+				recyclerView.UpdateAdapter();
+			}
+			else if (hasHeaderOrFooter != exists)
+			{
+				recyclerView.UpdateAdapter();
+			}
+		}
+
+		bool DoesHeaderExist(RecyclerView.Adapter adapter)
+		{
+			if (adapter.ItemCount <= 0)
+			{
+				return false;
+			}
+
+			try
+			{
+				return adapter.GetItemViewType(0) == ItemViewType.Header;
+			}
+			catch
+			{
+				return false;
+			}
+		}
+
+		bool DoesFooterExist(RecyclerView.Adapter adapter)
+		{
+			var footerPosition = adapter.ItemCount - 1;
+			if (footerPosition < 0)
+			{
+				return false;
+			}
+
+			try
+			{
+				return adapter.GetItemViewType(footerPosition) == ItemViewType.Footer;
+			}
+			catch
+			{
+				return false;
+			}
+		}
+
+		bool IsDynamicChange()
+		{
+			return (PlatformView as RecyclerView)?.IsLaidOut == true;
+		}
 	}
 }

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue28509.cs

@@ -1,5 +1,3 @@
-#if TEST_FAILS_ON_ANDROID
-// https://github.com/dotnet/maui/issues/28676
 using NUnit.Framework;
 using UITest.Appium;
 using UITest.Core;
@@ -54,5 +52,4 @@ public void UpdateHeaderFooterDynamically()
 		App.Click("ToggleFooterButton");
 		App.WaitForElement("Footer Changed");
 	}
-}
-#endif
+}