CollectionView, the footer moves to the bottom of the page when the empty view or empty view template is enabled

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

@@ -109,8 +109,24 @@ void UpdateEmptyViewSize(double width, double height)
 
 			if (adapter is EmptyViewAdapter emptyViewAdapter)
 			{
+				var emptyView = emptyViewAdapter.EmptyView ?? emptyViewAdapter.EmptyViewTemplate;
+				Size size = Size.Zero;
+
+				IView view = emptyView as IView ?? (emptyView as DataTemplate)?.CreateContent() as IView;
+
+				if (view is not null)
+				{
+					if (view.Handler is null)
+					{
+						TemplateHelpers.GetHandler(view as View, this.MauiContext);
+					}
+
+					size = view.Measure(double.PositiveInfinity, double.PositiveInfinity);
+				}
+
+				var measuredHeight = !double.IsInfinity(size.Height) ? Context.ToPixels(size.Height) : height;
 				emptyViewAdapter.RecyclerViewWidth = width;
-				emptyViewAdapter.RecyclerViewHeight = height;
+				emptyViewAdapter.RecyclerViewHeight = measuredHeight > 0 ? measuredHeight : height;
 			}
 		}
 	}

src/Controls/src/Core/Handlers/Items/iOS/ItemsViewController.cs

@@ -533,8 +533,13 @@ protected virtual void RegisterViewTypes()
 
 		protected virtual CGRect DetermineEmptyViewFrame()
 		{
-			return new CGRect(CollectionView.Frame.X, CollectionView.Frame.Y,
-				CollectionView.Frame.Width, CollectionView.Frame.Height);
+			nfloat emptyViewHeight = 0;
+
+			if (_emptyViewFormsElement is IView emptyView)
+			{
+				emptyViewHeight = (nfloat)emptyView.Measure(CollectionView.Frame.Width, double.PositiveInfinity).Height;
+			}
+			return new CGRect(CollectionView.Frame.X, CollectionView.Frame.Y, CollectionView.Frame.Width, emptyViewHeight);
 		}
 
 		protected void RemeasureLayout(VisualElement formsElement)

src/Controls/src/Core/Handlers/Items/iOS/StructuredItemsViewController.cs

@@ -72,15 +72,20 @@ protected override CGRect DetermineEmptyViewFrame()
 			nfloat headerHeight = 0;
 			var headerView = CollectionView.ViewWithTag(HeaderTag);
 
-			if (headerView != null)
+			if (headerView is not null)
 				headerHeight = headerView.Frame.Height;
 
 			nfloat footerHeight = 0;
 			var footerView = CollectionView.ViewWithTag(FooterTag);
 
-			if (footerView != null)
+			if (footerView is not null)
 				footerHeight = footerView.Frame.Height;
 
+			var emptyView = CollectionView.ViewWithTag(EmptyTag);
+
+			if (emptyView is not null)
+				return base.DetermineEmptyViewFrame();
+
 			return new CGRect(CollectionView.Frame.X, CollectionView.Frame.Y, CollectionView.Frame.Width,
 				Math.Abs(CollectionView.Frame.Height - (headerHeight + footerHeight)));
 		}

src/Controls/tests/TestCases.HostApp/Issues/Issue24966.xaml

@@ -0,0 +1,58 @@
+<?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.Issue24966"
+             xmlns:cv1="clr-namespace:Maui.Controls.Sample"
+             xmlns:local="clr-namespace:Maui.Controls.Sample.Issues"
+             x:Name="ThisMainPage"
+             Title="Main Page">
+
+  <Grid RowDefinitions="Auto,*">
+
+    <HorizontalStackLayout
+          Grid.Row="0"
+          Padding="20"
+          HorizontalOptions="Center"
+          Spacing="20">
+      <Button Command="{Binding AddCommand}" Text="Add item" AutomationId="AddButton" />
+      <Button Command="{Binding RemoveCommand}" Text="Remove item" AutomationId="RemoveButton" />
+    </HorizontalStackLayout>
+
+    <cv1:CollectionView1 Grid.Row="1" ItemsSource="{Binding ItemList}">
+
+      <cv1:CollectionView1.HeaderTemplate>
+        <DataTemplate>
+          <Label
+              Padding="10"
+              FontAttributes="Bold"
+              FontSize="Large"
+              Text="Cities" />
+        </DataTemplate>
+      </cv1:CollectionView1.HeaderTemplate>
+
+      <cv1:CollectionView1.ItemTemplate>
+        <DataTemplate>
+          <Label Padding="20,5,5,5" Text="{Binding .}" />
+        </DataTemplate>
+      </cv1:CollectionView1.ItemTemplate>
+
+      <cv1:CollectionView1.EmptyViewTemplate>
+        <DataTemplate>
+          <Label Padding="20,5,5,5" Text="Empty" />
+        </DataTemplate>
+      </cv1:CollectionView1.EmptyViewTemplate>
+
+      <cv1:CollectionView1.FooterTemplate>
+        <DataTemplate>
+          <Label
+              Padding="10"
+              FontAttributes="Bold"
+              FontSize="Large"
+              Text="Hello world !!!" />
+        </DataTemplate>
+      </cv1:CollectionView1.FooterTemplate>
+
+    </cv1:CollectionView1>
+
+  </Grid>
+</ContentPage>

src/Controls/tests/TestCases.HostApp/Issues/Issue24966.xaml.cs

@@ -0,0 +1,73 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Runtime.CompilerServices;
+using System.Windows.Input;
+using System.Collections.Specialized;
+
+namespace Maui.Controls.Sample.Issues
+{
+	[XamlCompilation(XamlCompilationOptions.Compile)]
+	[Issue(IssueTracker.Github, 24966, "CollectionView, the footer moves to the bottom of the page when the empty view or empty view template is enabled")]
+	public partial class Issue24966
+	{
+		public Issue24966()
+		{
+			InitializeComponent();
+			BindingContext = new Issue24966ViewModel();
+		}
+	}
+	internal class Issue24966ViewModel
+	{
+		// Define a static list of cities to add to the collection
+		private List<string> _staticCities = new()
+		{
+			"Paris",
+			"New York",
+			"Tokyo",
+			"Berlin",
+			"Madrid",
+			"London"
+		};
+
+		private int _currentIndex = 0;
+
+		public ObservableCollection<string> ItemList { get; set; }
+
+		public ICommand AddCommand => new Command(Add);
+		public ICommand RemoveCommand => new Command(Remove);
+
+		public Issue24966ViewModel()
+		{
+			// Initialize the ItemList
+			ItemList = new ObservableCollection<string>();
+		}
+
+		private void Add()
+		{
+			// Add the next city from the static list
+			if (_currentIndex < _staticCities.Count)
+			{
+				ItemList.Add(_staticCities[_currentIndex]);
+				_currentIndex++;
+			}
+			else
+			{
+				// Optionally reset the index or handle the end of the list as needed
+				_currentIndex = 0;  // Resetting to allow cycling through the list again
+			}
+		}
+
+		private void Remove()
+		{
+			// Remove the last item in the list if any exist
+			if (ItemList.Count > 0)
+			{
+				ItemList.RemoveAt(ItemList.Count - 1);
+				// Decrement the index to ensure the correct city is added next time
+				_currentIndex = Math.Max(0, _currentIndex - 1);
+			}
+		}
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue24966.cs

@@ -0,0 +1,28 @@
+#if !MACCATALYST && !WINDOWS
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	internal class Issue24966 : _IssuesUITest
+	{
+		public Issue24966(TestDevice device) : base(device) { }
+
+		public override string Issue => "CollectionView, the footer moves to the bottom of the page when the empty view or empty view template is enabled";
+
+		[Test]
+		[Category(UITestCategories.CollectionView)]
+		public void CollectionViewFooterMovestoBottomWithEmptyvieworEmptyviewTemplate()
+		{
+			App.WaitForElement("AddButton");
+			App.Tap("AddButton");
+			App.Tap("AddButton");
+			App.Tap("RemoveButton");
+			App.Tap("RemoveButton");
+			// Here we check for dynamic Emptyview and Footer proper proper alignment in view it should not be at the bottom of screen.
+			VerifyScreenshot();
+		}
+	}
+}
+#endif