[Android] Render Border without set a Stroke

src/Core/src/Graphics/MauiDrawable.Android.cs

@@ -164,17 +164,20 @@ public void SetBorderBrush(GPaint? paint)
 			if (paint is SolidPaint solidPaint)
 				SetBorderBrush(solidPaint);
 
-			if (paint is LinearGradientPaint linearGradientPaint)
+			else if (paint is LinearGradientPaint linearGradientPaint)
 				SetBorderBrush(linearGradientPaint);
 
-			if (paint is RadialGradientPaint radialGradientPaint)
+			else if (paint is RadialGradientPaint radialGradientPaint)
 				SetBorderBrush(radialGradientPaint);
 
-			if (paint is ImagePaint imagePaint)
+			else if (paint is ImagePaint imagePaint)
 				SetBorderBrush(imagePaint);
 
-			if (paint is PatternPaint patternPaint)
+			else if (paint is PatternPaint patternPaint)
 				SetBorderBrush(patternPaint);
+
+			else
+				SetEmptyBorderBrush();
 		}
 
 		public void SetBorderBrush(SolidPaint solidPaint)
@@ -218,6 +221,27 @@ public void SetBorderBrush(RadialGradientPaint radialGradientPaint)
 			InvalidateSelf();
 		}
 
+		public void SetEmptyBorderBrush()
+		{
+			_invalidatePath = true;
+
+			if (_backgroundColor != null)
+			{
+				_borderColor = _backgroundColor.Value;
+				_stroke = null;
+			}
+			else
+			{
+				_borderColor = null;
+
+				if (_background != null)
+					SetBorderBrush(_background);
+			}
+
+			InitializeBorderIfNeeded();
+			InvalidateSelf();
+		}
+
 		public void SetBorderBrush(ImagePaint imagePaint)
 		{
 			throw new NotImplementedException();
@@ -473,7 +497,7 @@ bool HasBorder()
 		{
 			InitializeBorderIfNeeded();
 
-			return _shape != null && (_stroke != null || _borderColor != null);
+			return _shape != null;
 		}
 
 		void InitializeBorderIfNeeded()

src/Core/src/Platform/Android/StrokeExtensions.cs

@@ -129,7 +129,7 @@ public static void InvalidateBorderStrokeBounds(this AView platformView)
 
 		internal static void UpdateMauiDrawable(this AView platformView, IBorderStroke border)
 		{
-			bool hasBorder = border.Shape != null && border.Stroke != null;
+			bool hasBorder = border.Shape != null;
 
 			if (!hasBorder)
 				return;

src/Core/src/Platform/Android/ViewExtensions.cs

@@ -160,7 +160,7 @@ public static void SetWindowBackground(this AView view)
 
 		public static void UpdateBackground(this ContentViewGroup platformView, IBorderStroke border)
 		{
-			bool hasBorder = border.Shape != null && border.Stroke != null;
+			bool hasBorder = border.Shape != null;
 
 			if (hasBorder)
 				platformView.UpdateBorderStroke(border);

src/Core/tests/DeviceTests/Handlers/Border/BorderHandlerTests.Android.cs

@@ -1,12 +1,34 @@
 using System;
 using System.Threading.Tasks;
-using Microsoft.Maui.Graphics;
-using Microsoft.Maui.Handlers;
+using Microsoft.Maui.DeviceTests.Stubs;
+using Xunit;
 
 namespace Microsoft.Maui.DeviceTests
 {
 	public partial class BorderHandlerTests
 	{
+		[Theory(DisplayName = "Border render without Stroke")]
+		[InlineData(0xFF0000)]
+		[InlineData(0x00FF00)]
+		[InlineData(0x0000FF)]
+		public async Task BorderRenderWithoutStroke(uint color)
+		{
+			var expected = Color.FromUint(color);
+
+			var border = new BorderStub()
+			{
+				Content = new LabelStub { Text = "Without Stroke", TextColor = Colors.White },
+				Shape = new RoundRectangleShapeStub { CornerRadius = new CornerRadius(12) },
+				Background = new SolidPaintStub(expected),
+				Stroke = null,
+				StrokeThickness = 2,
+				Height = 100,
+				Width = 300
+			};
+
+			await ValidateHasColor(border, expected);
+		}
+
 		ContentViewGroup GetNativeBorder(BorderHandler borderHandler) =>
 			borderHandler.PlatformView;
 
@@ -20,4 +42,4 @@ Task ValidateHasColor(IBorderView border, Color color, Action action = null)
 			});
 		}
 	}
-}
+}