.NET 8 Preview 6 Android crashes with System.MissingMethodException

[Syed-RI]

Description

It appears by default, .NET 8 P6 is targeting Android api 34 which breaks quite a few 3rd party libraries (https://github.com/sswi/AcrylicView.MAUI/tree/master , https://github.com/syncfusion/maui-demos for example) who are yet to target .NET 8 and Android 34. Im seeing various exception such as, class not found exception.

Is there a way to lower the Android target in .NET8 P6 or we are forced to wait while Android 34 gos GA, then library authors update their library and then we, the MAUI mortals get to taste .NET 8 ?

Steps to Reproduce

N/A

Link to public reproduction project repository

Repro attached:
Preview6.zip
Build and deploy to an emulator running on API 29 (same goes for emulator running on API 34).

Log for Acrylic library:
log.txt

Log for Sf library:
log2.txt

Version with bug

8.0.0-preview.6.8686

Last version that worked well

7.0.52

Affected platforms

Android

Affected platform versions

Android 34

Did you find any workaround?

NOPE

Relevant log output

For Acrylic library I see:

System.MissingMethodException: Method not found: Microsoft.Maui.Graphics.Size Microsoft.Maui.IContentView.CrossPlatformMeasure(double,double)
   at Microsoft.Maui.Handlers.ViewHandler`2[[Xe.AcrylicView.Controls.IAcrylicView, Xe.AcrylicView, Version=1.1.0.0, Culture=neutral, PublicKeyToken=null],[Android.Widget.FrameLayout, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065]].OnCreatePlatformView() in D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:line 72
   at Microsoft.Maui.Handlers.ViewHandler.OnCreatePlatformElement() in D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandler.cs:line 134
   at Microsoft.Maui.Handlers.ElementHandler.CreatePlatformElement() in D:\a\_work\1\s\src\Core\src\Handlers\Element\ElementHandler.cs:line 101
   at Microsoft.Maui.Handlers.ElementHandler.SetVirtualView(IElement view) in D:\a\_work\1\s\src\Core\src\Handlers\Element\ElementHandler.cs:line 50
   at Microsoft.Maui.Handlers.ViewHandler`2[[Xe.AcrylicView.Controls.IAcrylicView, Xe.AcrylicView, Version=1.1.0.0, Culture=neutral, PublicKeyToken=null],[Android.Widget.FrameLayout, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065]].SetVirtualView(IView view) in D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:line 53
   at Microsoft.Maui.Handlers.ViewHandler`2[[Xe.AcrylicView.Controls.IAcrylicView, Xe.AcrylicView, Version=1.1.0.0, Culture=neutral, PublicKeyToken=null],[Android.Widget.FrameLayout, Mono.Android, Version=0.0.0.0, Culture=neutral, PublicKeyToken=84e04ff9cfb79065]].SetVirtualView(IElement view) in D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:line 56
   at Microsoft.Maui.Controls.Element.SetHandler(IElementHandler newHandler) in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 831
   at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value) in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 781
   at Microsoft.Maui.Controls.VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value) in D:\a\_work\1\s\src\Controls\src\Core\VisualElement\VisualElement.cs:line 1660
   at Microsoft.Maui.Platform.ElementExtensions.ToHandler(IElement view, IMauiContext context) in D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:line 96
   at Microsoft.Maui.Platform.ElementExtensions.ToPlatform(IElement view, IMauiContext context) in D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:line 127
   at Microsoft.Maui.Handlers.ContentViewHandler.UpdateContent(IContentViewHandler handler) in D:\a\_work\1\s\src\Core\src\Handlers\ContentView\ContentViewHandler.Android.cs:line 42
   at Microsoft.Maui.Handlers.ContentViewHandler.MapContent(IContentViewHandler handler, IContentView page) in D:\a\_work\1\s\src\Core\src\Handlers\ContentView\ContentViewHandler.Android.cs:line 47
   at Microsoft.Maui.PropertyMapper`2.<>c__DisplayClass5_0[[Microsoft.Maui.IContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Handlers.IContentViewHandler, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].<Add>b__0(IElementHandler h, IElement v) in D:\a\_work\1\s\src\Core\src\PropertyMapper.cs:line 172
   at Microsoft.Maui.PropertyMapper.UpdatePropertyCore(String key, IElementHandler viewHandler, IElement virtualView) in D:\a\_work\1\s\src\Core\src\PropertyMapper.cs:line 47
   at Microsoft.Maui.PropertyMapper.UpdateProperties(IElementHandler viewHandler, IElement virtualView) in D:\a\_work\1\s\src\Core\src\PropertyMapper.cs:line 82
   at Microsoft.Maui.Handlers.ElementHandler.SetVirtualView(IElement view) in D:\a\_work\1\s\src\Core\src\Handlers\Element\ElementHandler.cs:line 79
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.ContentViewGroup, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IView view) in D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:line 53
   at Microsoft.Maui.Handlers.ContentViewHandler.SetVirtualView(IView view) in D:\a\_work\1\s\src\Core\src\Handlers\ContentView\ContentViewHandler.Android.cs:line 26
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.ContentViewGroup, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IElement view) in D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:line 56
   at Microsoft.Maui.Controls.Element.SetHandler(IElementHandler newHandler) in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 831
   at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value) in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 781
   at Microsoft.Maui.Controls.VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value) in D:\a\_work\1\s\src\Controls\src\Core\VisualElement\VisualElement.cs:line 1660
   at Microsoft.Maui.Platform.ElementExtensions.ToHandler(IElement view, IMauiContext context) in D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:line 96
   at Microsoft.Maui.Platform.ViewExtensions.ToHandler(IView view, IMauiContext context) in D:\a\_work\1\s\src\Core\src\Platform\ViewExtensions.cs:line 43
   at Microsoft.Maui.Controls.Platform.Compatibility.ShellContentFragment.OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) in D:\a\_work\1\s\src\Controls\src\Core\Compatibility\Handlers\Shell\Android\ShellContentFragment.cs:line 145
   at AndroidX.Fragment.App.Fragment.n_OnCreateView_Landroid_view_LayoutInflater_Landroid_view_ViewGroup_Landroid_os_Bundle_(IntPtr jnienv, IntPtr native__this, IntPtr native_inflater, IntPtr native_container, IntPtr native_savedInstanceState) in C:\a\_work\1\s\generated\androidx.fragment.fragment\obj\Release\net6.0-android\generated\src\AndroidX.Fragment.App.Fragment.cs:line 2031
   at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PPLLL_L(_JniMarshal_PPLLL_L callback, IntPtr jnienv, IntPtr klazz, IntPtr p0, IntPtr p1, IntPtr p2) in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNINativeWrapper.g.cs:line 352

For SF library I see:

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.TypeLoadException: Parent class vtable failed to initialize, due to: Could not load list of method overrides due to Method not found: Microsoft.Maui.Graphics.Size Microsoft.Maui.IContentView.CrossPlatformMeasure(double,double) assembly:/data/data/com.companyname.preview6/files/.__override__/Syncfusion.Maui.Charts.dll type:ChartBase member:(null)
   at System.Reflection.ConstructorInvoker.InterpretedInvoke(Object obj, IntPtr* args)
   at System.Reflection.ConstructorInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)
   --- End of inner exception stack trace ---
   at System.Reflection.ConstructorInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)
   at System.RuntimeType.CreateInstanceMono(Boolean nonPublic, Boolean wrapExceptions)
   at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean wrapExceptions)
   at System.Activator.CreateInstance(Type type, Boolean nonPublic, Boolean wrapExceptions)
   at System.Activator.CreateInstance(Type type, Boolean nonPublic)
   at System.Activator.CreateInstance(Type type)
   at Microsoft.Maui.Controls.Xaml.CreateValuesVisitor.Visit(ElementNode node, INode parentNode) in D:\a\_work\1\s\src\Controls\src\Xaml\CreateValuesVisitor.cs:line 102
   at Microsoft.Maui.Controls.Xaml.ElementNode.Accept(IXamlNodeVisitor visitor, INode parentNode) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlNode.cs:line 159
   at Microsoft.Maui.Controls.Xaml.RootNode.Accept(IXamlNodeVisitor visitor, INode parentNode) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlNode.cs:line 212
   at Microsoft.Maui.Controls.Xaml.XamlLoader.Visit(RootNode rootnode, HydrationContext visitorContext, Boolean useDesignProperties) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlLoader.cs:line 207
   at Microsoft.Maui.Controls.Xaml.XamlLoader.Load(Object view, String xaml, Assembly rootAssembly, Boolean useDesignProperties) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlLoader.cs:line 78
   at Microsoft.Maui.Controls.Xaml.XamlLoader.Load(Object view, String xaml, Boolean useDesignProperties) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlLoader.cs:line 53
   at Microsoft.Maui.Controls.Xaml.XamlLoader.Load(Object view, Type callingType) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlLoader.cs:line 49
   at Microsoft.Maui.Controls.Xaml.Extensions.LoadFromXaml[SfControlsView](SfControlsView view, Type callingType) in D:\a\_work\1\s\src\Controls\src\Xaml\ViewExtensions.cs:line 37
   at Preview6.SfControlsView.InitializeComponent() in /Users/syedhoque/Documents/Repos/Preview6/Preview6/Microsoft.Maui.Controls.SourceGen/Microsoft.Maui.Controls.SourceGen.CodeBehindGenerator/SfControlsView.xaml.sg.cs:line 26
   at Preview6.SfControlsView..ctor() in /Users/syedhoque/Documents/Repos/Preview6/Preview6/SfControlsView.xaml.cs:line 11
   at System.Reflection.ConstructorInvoker.InterpretedInvoke(Object obj, IntPtr* args)
   at System.Reflection.ConstructorInvoker.Invoke(Object obj, IntPtr* args, BindingFlags invokeAttr)
   at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2[[Microsoft.Extensions.DependencyInjection.ServiceLookup.RuntimeResolverContext, Microsoft.Extensions.DependencyInjection, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60],[System.Object, System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].VisitCallSiteMain(ServiceCallSite callSite, RuntimeResolverContext argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitDisposeCache(ServiceCallSite transientCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2[[Microsoft.Extensions.DependencyInjection.ServiceLookup.RuntimeResolverContext, Microsoft.Extensions.DependencyInjection, Version=8.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60],[System.Object, System.Private.CoreLib, Version=8.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].VisitCallSite(ServiceCallSite callSite, RuntimeResolverContext argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.RuntimeServiceProviderEngine.<>c__DisplayClass4_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
   at Microsoft.Maui.MauiContext.WrappedServiceProvider.GetService(Type serviceType) in D:\a\_work\1\s\src\Core\src\MauiContext.cs:line 68
   at Microsoft.Maui.Controls.Routing.TypeRouteFactory.GetOrCreate(IServiceProvider services) in D:\a\_work\1\s\src\Controls\src\Core\Routing.cs:line 273
   at Microsoft.Maui.Controls.Routing.GetOrCreateContent(String route, IServiceProvider services) in D:\a\_work\1\s\src\Controls\src\Core\Routing.cs:line 162
   at Microsoft.Maui.Controls.ShellSection.GetOrCreateFromRoute(String route, ShellRouteParameters queryData, IServiceProvider services, Boolean isLast, Boolean isPopping) in D:\a\_work\1\s\src\Controls\src\Core\Shell\ShellSection.cs:line 485
   at Microsoft.Maui.Controls.ShellSection.GoToAsync(ShellNavigationRequest request, ShellRouteParameters queryData, IServiceProvider services, Nullable`1 animate, Boolean isRelativePopping) in D:\a\_work\1\s\src\Controls\src\Core\Shell\ShellSection.cs:line 526
   at Microsoft.Maui.Controls.ShellNavigationManager.GoToAsync(ShellNavigationParameters shellNavigationParameters, ShellNavigationRequest navigationRequest) in D:\a\_work\1\s\src\Controls\src\Core\Shell\ShellNavigationManager.cs:line 197
   at Preview6.MainPage.OnSfControl(Object sender, EventArgs e) in /Users/syedhoque/Documents/Repos/Preview6/Preview6/MainPage.xaml.cs:line 19
   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_0(Object state)
   at Android.App.SyncContext.<>c__DisplayClass2_0.<Post>b__0() in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.App/SyncContext.cs:line 36
   at Java.Lang.Thread.RunnableImplementor.Run() in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Java.Lang/Thread.cs:line 36
   at Java.Lang.IRunnableInvoker.n_Run(IntPtr jnienv, IntPtr native__this) in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/obj/Release/net8.0/android-34/mcw/Java.Lang.IRunnable.cs:line 84
   at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PP_V(_JniMarshal_PP_V callback, IntPtr jnienv, IntPtr klazz) in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNINativeWrapper.g.cs:line 22

[jonathanpeppers]

To my knowledge, we did not hit any similar problems when .NET 7 moved to API 33 by default.

What are the class not found exception's you are seeing? Can you cause the crash and share a log via adb logcat -d > log.txt?

[ghost]

Hi @Syed-RI. We have added the "s/needs-info" label to this issue, which indicates that we have an open question for you before we can take further action. This issue will be closed automatically in 7 days if we do not hear back from you by then - please feel free to re-open it if you come back to this issue after that time.

[Syed-RI]

@jonathanpeppers and @jsuarezruiz added repro and relevant logs. Hope that helps?

[jonathanpeppers]

@Syed-RI yes, this looks like an API change in MAUI:

System.MissingMethodException: Method not found: Microsoft.Maui.Graphics.Size Microsoft.Maui.IContentView.CrossPlatformMeasure(double,double)

This isn't anything to do with Android API 34?

The API was changed because the old one could introduce memory leaks: #15303

[Syed-RI]

@jonathanpeppers Thanks for confirming, but it does breaks the libraries that relies on this right? How to get around this?

[jonathanpeppers]

@PureWeen @hartez @mattleibow do we have a recommendation for API changes like this?

From what I see, the owner of this library would need to build a preview NuGet package for .NET 8?

https://github.com/sswi/AcrylicView.MAUI/blob/1743fc072967ca5aabb39dc91038bbe53e4da989/AcrylicView/Platforms/iOS/AcrylicViewHandler.cs#L19-L20

[Syed-RI]

@jonathanpeppers @jsuarezruiz @PureWeen @mattleibow Hmm more importantly, I think breaking public API changes like this should be handled more gracefully internally at MAUI project. Maybe mark the existing method as Obsolete and point people towards the new one? I thought that would be the "de-facto" no?

[jonathanpeppers]

I don't know how "public" handler APIs are? It might be they have a less strict policy, compared to an API change on Label.

[Syed-RI]

I don't know how "public" handler APIs are? It might be they have a less strict policy, compared to an API change on Label.

Me neither and that was just my assumption as I have not done much due diligence to check the PR referenced above and the source for the library.

Apologies

[Syed-RI]

Wow that was quick!. Thanks everyone! ❤️