TabbedPage inside a ShellContent fails on Android with Java.Lang.IllegalArgumentException

[emorell96]

Description

So I am trying to use a TabbedPage inside a ShellContent. On Windows all works, but on Android you get an exception when the app loads, or you navigate to the tabbed page.

The code is simple:

This is inside App.xaml

    <Application.MainPage>
        <Shell>
            <ShellContent Title="TabbedPage" Route="TabbedPage" ContentTemplate="{DataTemplate local:TabbedPageExample}" />
            <ShellContent Title="ContentPage" Route="ContentPage" ContentTemplate="{DataTemplate local:MainPage}" />
        </Shell>
    </Application.MainPage>

The local:TabbedPageExample is just a TabbedPage with two empty ContentPage inside the TabbedPage.Children. You can see the code in the github I linked at the end.

Windows WinUI example:

On Android it just fails with the exception:

Java.Lang.IllegalArgumentException
Message=No view found for id 0x7f08013d (com.companyname.TabbedPageBugDemo:id/navigationlayout_toptabs) for fragment ViewFragment{7e5f7b2} (bec44d9c-f254-4734-854a-1a8f9615c311 id=0x7f08013d)

I have created a minimal version to showcase the bug. You can find it here: https://github.com/StockDrops/TabbedPageBugDemo

Thank you!

Steps to Reproduce

1. Create a new MAUI app from the Visual Studio template.
2. Create a shell with a tabbed page.
3. The app fails when you visit the tabbed page through the shell navigation or when the shell loads if it's the main page.

Version with bug

Preview 10 (current)

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

API 30, Android 11

Did you find any workaround?

No response

Relevant log output

[AndroidRuntime] FATAL EXCEPTION: main
[AndroidRuntime] Process: com.companyname.TabbedPageBugDemo, PID: 30772
[AndroidRuntime] 	at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(Fragm12-12 00:46:37.721 E/AndroidRuntime(30772): java.lang.IllegalArgumentException: No view found for id 0x7f08013d (com.companyname.TabbedPageBugDemo:id/navigationlayout_toptabs) for fragment ViewFragment{7e5f7b2} (bec44d9c-f254-4734-854a-1a8f9615c311 id=0x7f08013d)
[AndroidRuntime] 	at androidx.fragment.app.FragmentStateManager.createView(FragmentStateManager.java:513)
[AndroidRuntime] 	at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:282)
[AndroidRuntime] 	at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:2189)
[AndroidRuntime] 	at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:2106)
[AndroidRuntime] 	at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:2002)
[AndroidRuntime] 	at androidx.fragment.app.FragmentManager$5.run(FragmentManager.java:524)
[AndroidRuntime] 	at android.os.Handler.handleCallback(Handler.java:938)
[AndroidRuntime] 	at android.os.Handler.dispatchMessage(Handler.java:99)
[AndroidRuntime] 	at android.os.Looper.loop(Looper.java:223)
[AndroidRuntime] 	at android.app.ActivityThread.main(ActivityThread.java:7656)
[AndroidRuntime] 	at java.lang.reflect.Method.invoke(Native Method)
[AndroidRuntime] 	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:592)
[AndroidRuntime] 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:947)
**Java.Lang.IllegalArgumentException:** 'No view found for id 0x7f08013d (com.companyname.TabbedPageBugDemo:id/navigationlayout_toptabs) for fragment ViewFragment{7e5f7b2} (bec44d9c-f254-4734-854a-1a8f9615c311 id=0x7f08013d)'

[PureWeen]

Mixing TabbedPage and FlyoutPage with Shell is currently not supported this experience might be better once we get to P13 but it won't be officially supported until after the NET6

[Dreamescaper]

Is it possible at least to throw a better exception if that's not a supported scenario?

[PureWeen]

Duplicate of #6389