Allow Changing AppShell at runtime

[logikonline]

Description

To migrate our Xamarin Forms apps over, we need to be able to change the app shell at runtime. We have different layout structures that are very complex and divide them according to appshells.

Currently, when switching the AppShell, we get the following error attached to the log
app shells

Steps to Reproduce

Application.Current.MainPage = new AppShell();

then change it to another app shell.

Error:
No service for type 'Microsoft.Maui.Controls.Hosting.EffectsFactory' has been registered.

We can change the MainPage to another ContentPage after an AppShell was previously set, but but an AppShell

#16067

The issue above outlines the same issue, unsure why it was closed.

Link to public reproduction project repository

#16067 (comment)

Version with bug

8.0.7 SR2

Is this a regression from previous behavior?

Yes, this used to work in Xamarin.Forms

Last version that worked well

Unknown/Other

Affected platforms

iOS, Android

Affected platform versions

Android 13, iOS 16

Did you find any workaround?

No workaround yet

Relevant log output

{System.InvalidOperationException: No service for type 'Microsoft.Maui.Controls.Hosting.EffectsFactory' has been registered.
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[EffectsFactory](IServiceProvider provider)
   at Microsoft.Maui.Controls.Element.get_EffectsFactory() in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 854
   at Microsoft.Maui.Controls.Element.Microsoft.Maui.Controls.IEffectControlProvider.RegisterEffect(Effect effect) in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 940
   at Microsoft.Maui.Controls.Element.AttachEffect(Effect effect) in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 728
   at Microsoft.Maui.Controls.Element.set_EffectControlProvider(IEffectControlProvider value) in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 407
   at Microsoft.Maui.Controls.Element.OnHandlerChangedCore() in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 883
   at Microsoft.Maui.Controls.VisualElement.OnHandlerChangedCore() in D:\a\_work\1\s\src\Controls\src\Core\VisualElement\VisualElement.cs:line 1714
   at Microsoft.Maui.Controls.View.OnHandlerChangedCore() in D:\a\_work\1\s\src\Controls\src\Core\View\View.cs:line 279
   at Microsoft.Maui.Controls.Element.SetHandler(IElementHandler newHandler) in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 923
   at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value) in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 863
   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 2031
   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.LayoutHandler.SetVirtualView(IView view) in D:\a\_work\1\s\src\Core\src\Handlers\Layout\LayoutHandler.Android.cs:line 41
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.ILayout, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.LayoutViewGroup, 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 921
   at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value) in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 863
   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 2031
   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.LayoutHandler.SetVirtualView(IView view) in D:\a\_work\1\s\src\Core\src\Handlers\Layout\LayoutHandler.Android.cs:line 41
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.ILayout, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.LayoutViewGroup, 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 921
   at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value) in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 863
   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 2031
   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 921
   at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value) in D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:line 863
   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 2031
   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.Controls.Platform.Compatibility.ShellViewRenderer.OnViewSet(IView view) in D:\a\_work\1\s\src\Controls\src\Core\Compatibility\Handlers\Shell\Android\ShellContentView.cs:line 118
   at Microsoft.Maui.Controls.Platform.Compatibility.ShellViewRenderer.set_View(IView value) in D:\a\_work\1\s\src\Controls\src\Core\Compatibility\Handlers\Shell\Android\ShellContentView.cs:line 48
   at Microsoft.Maui.Controls.Platform.Compatibility.ShellViewRenderer..ctor(Context context, View view, IMauiContext mauiContext) in D:\a\_work\1\s\src\Controls\src\Core\Compatibility\Handlers\Shell\Android\ShellContentView.cs:line 40
   at Microsoft.Maui.Controls.Platform.Compatibility.ContainerView.OnViewSet(View view) in D:\a\_work\1\s\src\Controls\src\Core\Compatibility\Handlers\Shell\Android\ContainerView.cs:line 181
   at Microsoft.Maui.Controls.Platform.Compatibility.ContainerView.set_View(View value) in D:\a\_work\1\s\src\Controls\src\Core\Compatibility\Handlers\Shell\Android\ContainerView.cs:line 43
   at Microsoft.Maui.Controls.Platform.Compatibility.ContainerView..ctor(Context context, View view, IMauiContext mauiContext) in D:\a\_work\1\s\src\Controls\src\Core\Compatibility\Handlers\Shell\Android\ContainerView.cs:line 25
   at Microsoft.Maui.Controls.Platform.Compatibility.ShellFlyoutTemplatedContentRenderer.HeaderContainer..ctor(Context context, View view, IMauiContext mauiContext) in D:\a\_work\1\s\src\Controls\src\Core\Compatibility\Handlers\Shell\Android\ShellFlyoutTemplatedContentRenderer.cs:line 683
   at Microsoft.Maui.Controls.Platform.Compatibility.ShellFlyoutTemplatedContentRenderer.UpdateFlyoutHeader() in D:\a\_work\1\s\src\Controls\src\Core\Compatibility\Handlers\Shell\Android\ShellFlyoutTemplatedContentRenderer.cs:line 272
   at Microsoft.Maui.Controls.Platform.Compatibility.ShellFlyoutTemplatedContentRenderer.LoadView(IShellContext shellContext) in D:\a\_work\1\s\src\Controls\src\Core\Compatibility\Handlers\Shell\Android\ShellFlyoutTemplatedContentRenderer.cs:line 92
   at Microsoft.Maui.Controls.Platform.Compatibility.ShellFlyoutTemplatedContentRenderer..ctor(IShellContext shellContext) in D:\a\_work\1\s\src\Controls\src\Core\