Crash ObjectDisposed_ObjectName_Name, AndroidX.AppCompat.Widget.AppCompatImageView

[dimonovdd]

Description

According to the AppCenter logs, I see that the application crashes after closing some pages.

Steps to Reproduce

I can't attach steps to reproduce because I only see this crash in the AppCenter logs.

Link to public reproduction project repository

No response

Version with bug

9.0.70 SR7

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

No response

Did you find any workaround?

public class FixedImageHandler : ImageHandler
{
    public FixedImageHandler() { }

    public FixedImageHandler(IPropertyMapper? mapper) : base(mapper) { }

    public FixedImageHandler(IPropertyMapper? mapper, CommandMapper? commandMapper) : base(mapper, commandMapper) { }

    protected override ImageView CreatePlatformView()
    {
        var imageView = new FixedAppCompatImageView(Context);

        // Enable view bounds adjustment on measure.
        // This allows the ImageView's OnMeasure method to account for the image's intrinsic
        // aspect ratio during measurement, which gives us more useful values during constrained
        // measurement passes.
        imageView.SetAdjustViewBounds(true);

        return imageView;
    }
}
    
public class FixedAppCompatImageView : AppCompatImageView
{
    protected FixedAppCompatImageView(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
    {
    }

    public FixedAppCompatImageView(Context context) : base(context)
    {
    }

    public FixedAppCompatImageView(Context context, IAttributeSet? attrs) : base(context, attrs)
    {
    }

    public FixedAppCompatImageView(Context context, IAttributeSet? attrs, int defStyleAttr) : base(context, attrs, defStyleAttr)
    {
    }

    public override void RemoveOnAttachStateChangeListener(IOnAttachStateChangeListener? listener)
    {
        if (this.IsNotAlive() || listener.IsNotAlive())
            return;
        base.RemoveOnAttachStateChangeListener(listener);
    }
}

Relevant log output

System.ObjectDisposedException: ObjectDisposed_Generic
ObjectDisposed_ObjectName_Name, AndroidX.AppCompat.Widget.AppCompatImageView
   at Java.Interop.JniPeerMembers.AssertSelf(IJavaPeerable )
   at Java.Interop.JniPeerMembers.JniInstanceMethods.InvokeVirtualVoidMethod(String , IJavaPeerable , JniArgumentValue* )
   at Android.Views.View.RemoveOnAttachStateChangeListener(IOnAttachStateChangeListener )
   at Android.Views.View.<>c__DisplayClass3033_0.<remove_ViewDetachedFromWindow>b__0(IOnAttachStateChangeListener __v)
   at Java.Interop.EventHelper.RemoveEventHandler[IOnAttachStateChangeListener,IOnAttachStateChangeListenerImplementor](WeakReference& , Func`2 , Action`1 , Action`1 )
   at Android.Views.View.remove_ViewDetachedFromWindow(EventHandler`1 )
   at Microsoft.Maui.Platform.ViewExtensions.<>c__DisplayClass43_0.<OnUnloaded>b__1()
   at Microsoft.Maui.Platform.ActionDisposable.Dispose()
   at Microsoft.Maui.Platform.ViewExtensions.<>c__DisplayClass43_0.<OnUnloaded>b__3()
   at Java.Lang.Thread.RunnableImplementor.Run()
   at Java.Lang.IRunnableInvoker.n_Run(IntPtr jnienv, IntPtr native__this)
   at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PP_V(_JniMarshal_PP_V callback, IntPtr jnienv, IntPtr klazz) 

    at Java.Interop.JniPeerMembers.AssertSelf(IJavaPeerable )
   at Java.Interop.JniPeerMembers.JniInstanceMethods.InvokeVirtualVoidMethod(String , IJavaPeerable , JniArgumentValue* )
   at Android.Views.View.RemoveOnAttachStateChangeListener(IOnAttachStateChangeListener )
   at Android.Views.View.<>c__DisplayClass3033_0.<remove_ViewDetachedFromWindow>b__0(IOnAttachStateChangeListener __v)
   at Java.Interop.EventHelper.RemoveEventHandler[IOnAttachStateChangeListener,IOnAttachStateChangeListenerImplementor](WeakReference& , Func`2 , Action`1 , Action`1 )
   at Android.Views.View.remove_ViewDetachedFromWindow(EventHandler`1 )
   at Microsoft.Maui.Platform.ViewExtensions.<>c__DisplayClass43_0.<OnUnloaded>b__1()
   at Microsoft.Maui.Platform.ActionDisposable.Dispose()
   at Microsoft.Maui.Platform.ViewExtensions.<>c__DisplayClass43_0.<OnUnloaded>b__3()
   at Java.Lang.Thread.RunnableImplementor.Run()
   at Java.Lang.IRunnableInvoker.n_Run(IntPtr jnienv, IntPtr native__this)
   at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PP_V(_JniMarshal_PP_V callback, IntPtr jnienv, IntPtr klazz) <1><>

[dimonovdd]

It's definitely related to this PR But I suspect that it's Onattachstatechangelistener? listener that's the problem.

listener.IsNotAlive() - that's what solved this issue

[PureWeen]

/triage

[github-actions]

Triage Summary

Labels will be applied to indicate the affected platform (Android), the area of concern (core platform integration), and the possibility of this being a regression issue.

This issue is a potential regression, as the user explicitly mentions that the functionality worked in previous versions of .NET MAUI.

Detailed Summary and Actions

Summary of the triage:

• The issue is explicitly related to the Android platform, evidenced by the crash trace involving AndroidX.AppCompat.Widget.AppCompatImageView.
• The crash involves a System.ObjectDisposedException, suggesting a platform lifecycle or interoperability issue, which relates to the core platform integration.
• The user identified this as a regression, citing that the feature worked in earlier .NET MAUI versions.

Summary of the actions that will be performed:

Action	Item	Description
Apply Label	platform/android	The issue concerns a crash specific to AndroidX.AppCompat.Widget.AppCompatImageView on Android.
Apply Label	area-core-platform	The crash appears to stem from a core platform lifecycle or interoperability issue in Android.
Apply Label	potential-regression	The user stated the feature worked in earlier .NET MAUI versions, indicating a possible regression.

This entire triage process was automated by AI and mistakes may have been made. Please let us know so we can continue to improve.

[PureWeen]

The fix hasn't been released yet, it will be part of SR9
#30115