[Android] Fix for Resize method returns an image that has already been disposed

[SyedAbdulAzeemSF4852]

Note

Are you waiting for the changes in this PR to be merged?
It would be very helpful if you could test the resulting artifacts from this PR and let us know in a comment if this change resolves your issue. Thank you!

Issue Details

• In GraphicsView, the Resize method returns an image that has already been disposed.

Root Cause

• The Bitmap property returned the internal _bitmap instance directly, which would be disposed during the Dispose() call if disposeBitmap was set to true, potentially leading to access of a disposed object.

Description of Change

• Updated the Bitmap property to return a new bitmap instance using Bitmap.CreateBitmap, ensuring that the original bitmap is not reused after disposal.

Reference

maui/src/Graphics/src/Graphics/Platforms/iOS/PlatformBitmapExportContext.cs

Lines 41 to 49 in acdb6f2

	public override ICanvas Canvas => _canvas;
	public UIImage UIImage => UIImage.FromImage(_bitmapContext.ToImage());
	public PlatformImage PlatformImage => new PlatformImage(UIImage);
	public CGImage CGImage => _bitmapContext.ToImage();
	public override IImage Image => PlatformImage;

Issues Fixed

Fixes #29961

Validated the behaviour in the following platforms

• Windows
• Android
• iOS
• Mac

Output

Before	After
Before.mov	After.mov

[dotnet-policy-service]

Hey there @@SyedAbdulAzeemSF4852! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.

[jsuarezruiz]

/azp run MAUI-UITests-public

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[Copilot]

Pull Request Overview

This PR ensures the Android Resize method returns a valid, non-disposed image by cloning the internal bitmap when disposal is requested.

• Clone the internal bitmap in PlatformBitmapExportContext.Bitmap instead of returning the original.
• Added a UI test in TestCases.Shared.Tests to verify the Resize method.
• Implemented a host app page in TestCases.HostApp and embedded the sample image resource.

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 2 comments.

File	Description
src/Graphics/src/Graphics/Platforms/Android/PlatformBitmapExportContext.cs	Updated the Bitmap getter to return a copied instance when _disposeBitmap is true
src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue29961.cs	Added a UI test to verify the resized image is not disposed
src/Controls/tests/TestCases.HostApp/Issues/Issue29961.cs	Created a host app page and button for exercising the resize behavior
src/Controls/tests/TestCases.HostApp/Controls.TestCases.HostApp.csproj	Embedded the royals.png image used by the host app test

Comments suppressed due to low confidence (1)

src/Graphics/src/Graphics/Platforms/Android/PlatformBitmapExportContext.cs:40

• [nitpick] Cloning the bitmap on every access can be expensive. Consider caching the copied instance or providing an explicit CloneBitmap() method to avoid repeated allocations when Bitmap is accessed multiple times.

public Bitmap Bitmap => _disposeBitmap ? _bitmap.Copy(_bitmap.GetConfig(), false) : _bitmap;

[Copilot]

The AutomationId is reused from Issue21886 and may conflict with other tests. Please update it to a unique identifier (e.g., Issue29961_ResizeBtn) to ensure uniqueness.

[Copilot]

The test is conditionally compiled only for Windows (TEST_FAILS_ON_WINDOWS), which prevents it from executing on Android. Remove or adjust the compilation symbol so the test runs on all relevant platforms.

[jsuarezruiz]

This AutomationId looks like duplicated, could you use the issue identifier number?
Issue29961_ResizeBtn

[SyedAbdulAzeemSF4852]

@jsuarezruiz , Updated the AutomationId based on the suggestion.

[jsuarezruiz]

Issue29961_ResizeBtn

[SyedAbdulAzeemSF4852]

@jsuarezruiz , Updated the AutomationId based on the suggestion.