Tabbed page in .Net Maui not working on Android

[ThomasCarltonInPerson]

I have a tabbed page in .Net Maui as follows :

	<?xml version="1.0" encoding="utf-8" ?>
	<TabbedPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
				 xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
				 x:Class="MyApp.Pages.SomeClass"
				 xmlns:Controls="clr-namespace:MyApp.Resources.Controls"
				 xmlns:local="clr-namespace:MyApp.Pages"
				 Title="Some title">
				   
		<local:Page1 />
		<local:Page2 />
		<local:Page3 />

	</TabbedPage>

The pages are more or less the same :

	<?xml version="1.0" encoding="utf-8" ?>
	<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
				 xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
				 x:Class="MyApp.Pages.Page1"
				 xmlns:Controls="clr-namespace:MyApp.Resources.Controls"                          
				 xmlns:VerticalStackLayout="clr-namespace:MyApp.Resources.Controls"      
				 Title="Vente">


		<VerticalStackLayout>
			<Label Text="Page 1"/>
		</VerticalStackLayout>       
	</ContentPage>

C# code :

	public partial class Page1 : ContentPage
	{    
		public Page1()
		{
			InitializeComponent();        
		}
	}

The tabbed page works properly on windows :

However on physical android device, I'm getting the following exception when opening my tabbed page. None of these pages have a C# stuff. They are 100% empty.

0xFFFFFFFFFFFFFFFF in Android.Runtime.JNIEnv.monodroid_debugger_unhandled_exception	C#
0x1A in Android.Runtime.JNINativeWrapper._unhandled_exception at /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNINativeWrapper.g.cs:12,5	C#
0x23 in Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PPLLL_L at /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNINativeWrapper.g.cs:353,26	C#
0xEE in Microsoft.Maui.Controls.Handlers.TabbedPageManager.SetTabLayout at D:\a\_work\1\s\src\Controls\src\Core\Platform\Android\TabbedPageManager.cs:240,5	C#
0x1BD in Microsoft.Maui.Controls.Handlers.TabbedPageManager.SetElement at D:\a\_work\1\s\src\Controls\src\Core\Platform\Android\TabbedPageManager.cs:162,5	C#
0x20 in Microsoft.Maui.Controls.TabbedPage.CreatePlatformView at D:\a\_work\1\s\src\Controls\src\Core\HandlerImpl\TabbedPage\TabbedPage.Android.cs:23,4	C#
0x10 in Microsoft.Maui.Controls.TabbedPage.OnCreatePlatformView at D:\a\_work\1\s\src\Controls\src\Core\HandlerImpl\TabbedPage\TabbedPage.Android.cs:30,5	C#
0x15 in Microsoft.Maui.Handlers.ViewHandler<Microsoft.Maui.ITabbedView,Android.Views.View>.OnCreatePlatformView at D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:72,4	C#
0x1 in Microsoft.Maui.Handlers.ViewHandler.OnCreatePlatformElement at D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandler.cs:119,4	C#
0x1 in Microsoft.Maui.Handlers.ElementHandler.CreatePlatformElement at D:\a\_work\1\s\src\Core\src\Handlers\Element\ElementHandler.cs:96,4	C#
0x49 in Microsoft.Maui.Handlers.ElementHandler.SetVirtualView at D:\a\_work\1\s\src\Core\src\Handlers\Element\ElementHandler.cs:52,4	C#
0x2 in Microsoft.Maui.Handlers.ViewHandler.SetVirtualView at D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandler.cs:125,4	C#
0x2 in Microsoft.Maui.Handlers.ViewHandler<Microsoft.Maui.ITabbedView,Android.Views.View>.SetVirtualView at D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:53,4	C#
0x7 in Microsoft.Maui.Handlers.ViewHandler<Microsoft.Maui.ITabbedView,Android.Views.View>.SetVirtualView at D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:56,4	C#
0x65 in Microsoft.Maui.Controls.Element.SetHandler at D:\a\_work\1\s\src\Controls\src\Core\HandlerImpl\Element\Element.Impl.cs:64,6	C#
0x2 in Microsoft.Maui.Controls.Element.set_Handler at D:\a\_work\1\s\src\Controls\src\Core\HandlerImpl\Element\Element.Impl.cs:20,11	C#
0x18 in Microsoft.Maui.Controls.VisualElement.Microsoft.Maui.IElement.set_Handler at D:\a\_work\1\s\src\Controls\src\Core\HandlerImpl\VisualElement\VisualElement.Impl.cs:301,5	C#
0xB0 in Microsoft.Maui.Platform.ElementExtensions.ToHandler at D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:96,4	C#
0x2 in Microsoft.Maui.Platform.ViewExtensions.ToHandler at D:\a\_work\1\s\src\Core\src\Platform\ViewExtensions.cs:44,4	C#
0xAA in Microsoft.Maui.Controls.Platform.Compatibility.ShellContentFragment.OnCreateView at D:\a\_work\1\s\src\Controls\src\Core\Compatibility\Handlers\Shell\Android\ShellContentFragment.cs:145,4	C#
0x24 in AndroidX.Fragment.App.Fragment.n_OnCreateView_Landroid_view_LayoutInflater_Landroid_view_ViewGroup_Landroid_os_Bundle_ at C:\a\_work\3\s\generated\androidx.fragment.fragment\obj\Release\net6.0-android\generated\src\AndroidX.Fragment.App.Fragment.cs:1999,4	C#
0xD in Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PPLLL_L at /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNINativeWrapper.g.cs:352,5	C#

Does anyone know if .Net Maui tabbed pages work on Android please ?

Thanks

[ghost]

Hi @ThomasCarltonInPerson. 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.

[ghost]

Hi @ThomasCarltonInPerson. We have added the "s/needs-repro" label to this issue, which indicates that we require steps and sample code to reproduce the issue before we can take further action. Please try to create a minimal sample project/solution or code samples which reproduce the issue, ideally as a GitHub repo that we can clone. See more details about creating repros here: https://github.com/dotnet/maui/blob/main/.github/repro.md

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.

[PureWeen]

@ThomasCarltonInPerson can you please use the template as well? Without a version that makes this even harder to track down

[mattleibow]

Duplicate of #6389

This is because Shell does not support mixing non-Shell pages.

[ThomasCarltonInPerson]

Duplicate of #6389

This is because Shell does not support mixing non-Shell pages.

Thanks for your comment. Then how to "disable" shell please ?

[mattleibow]

Just don't use the AppShell.xaml.

Think of Shell as a really fancy navigation page.

If you want to use Shell and tabs, you can make use of shell tabs: https://learn.microsoft.com/en-us/dotnet/maui/fundamentals/shell/tabs

[ThomasCarltonInPerson]

I'm sorry. I don't get you. What do you mean by don't use the AppShell.xaml ? Do you mean removing the file entirely from the projet ? (deleting it for example).

Then how to handle the application initialization :

	public partial class App : Application
	{
		public static AppShell ApplicationShell;

		public App()
		{
			InitializeComponent();

			App.ApplicationShell = new AppShell();
			MainPage = ApplicationShell;
		}
	}

I'm sorry if my questions seem too basic but I'm an entire beginer in .Net Maui.

Thanks