[Android] Fixed ListView items height are not proper in initial loading with HasUnevenRows set as True.

src/Controls/src/Core/Compatibility/Handlers/ListView/Android/ViewCellRenderer.cs

@@ -307,7 +307,10 @@ protected override void OnMeasure(int widthMeasureSpec, int heightMeasureSpec)
 					}
 
 					var size = _viewHandler.MeasureVirtualView(widthMeasureSpec, heightMeasureSpec);
-					height = (int)size.Height;
+					if (_viewCell.Height > 0)
+						height = (int)Context.ToPixels(_viewCell.Height);
+					else
+						height = (int)size.Height;
 				}
 				else
 				{

src/Controls/tests/TestCases.HostApp/Issues/Issue26820.cs

@@ -0,0 +1,65 @@
+using System.Collections.ObjectModel;
+
+namespace Maui.Controls.Sample.Issues
+{
+	[Issue(IssueTracker.Github, 26820, "ListView items height are not proper in initial loading with HasUnevenRows set as True", PlatformAffected.Android)]
+	public class Issue26820 : TestContentPage
+	{
+		ListView list;
+		StackLayout stackLayout;
+
+		ObservableCollection<Person1> Data;
+		public static int Count = 0;
+
+
+		protected override void Init()
+		{
+			list = new ListView() { AutomationId = "listView" };
+
+			var template = new DataTemplate(typeof(UnevenViewCell));
+			list.ItemTemplate = template;
+
+			Data = new ObservableCollection<Person1>();
+			list.ItemsSource = Data;
+			list.HasUnevenRows = true;
+
+			for (int i = 0; i < 50; i++)
+			{
+				Data.Add(new Person1
+				{
+					FullName = "Andrew",
+					Address = "404 Somewhere"
+				});
+			}
+
+
+
+			stackLayout = new StackLayout();
+			stackLayout.Children.Add(list);
+
+			this.Content = stackLayout;
+		}
+
+	}
+	class UnevenViewCell : ViewCell
+	{
+		public UnevenViewCell()
+		{
+
+			var label = new Label();
+			label.SetBinding(Label.TextProperty, "FullName");
+			Height = Issue26820.Count % 2 == 0 ? 50 : 100;
+			View = label;
+			View.BackgroundColor = Issue26820.Count % 2 == 0 ? Colors.Pink : Colors.LightYellow;
+			Issue26820.Count++;
+		}
+	}
+
+
+	class Person1
+	{
+		public string FullName { get; set; }
+		public string Address { get; set; }
+	}
+
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue26820.cs

@@ -0,0 +1,25 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue26820 : _IssuesUITest
+	{
+
+		public Issue26820(TestDevice testDevice) : base(testDevice)
+		{
+		}
+
+		public override string Issue => "ListView items height are not proper in initial loading with HasUnevenRows set as True";
+
+		[Test]
+		[Category(UITestCategories.ListView)]
+		public void ListViewShouldRenderProperRowHeight()
+		{
+			App.WaitForElement("listView");
+			VerifyScreenshot();
+
+		}
+	}
+}