Prism navigation in PopupView that is inside NavigationPage.TitleView causes the app to crash in Android

Question

When I try to navigate using relative navigation it causes the app to crash, if using absolute layout it works nice.

There's a sample of the issue, I put a popup inside TitleView and another in ContentPage, the one in ContentPage works nice. A workaround is to put a button in TitleView that opens a Popup in ContentPage. Another very important thing is that in iOS it works with no problems.

Maybe another very important thing is that in old version this error doesn't happen at all, like 18.2.0.*

Relative navigation

NavigateAsync("MainPage");

Absolute navigation

NavigateAsync("/NavigationPage/MainPage");

Attachment: PopupWithPrism_a7d6938d.rar

Relative navigation

NavigateAsync("MainPage");

Absolute navigation

NavigateAsync("/NavigationPage/MainPage");Attachment: PopupWithPrism_a7d6938d.rar

Suja Venkatesan · Accepted Answer

Hi Felipe,We have fixed the reported issue “Prism navigation
in PopupView that is inside NavigationPage.TitleView causes the app to crash in
Android” and included the issue fix in our latest NuGet
release update version 20.3.0.48 which is available for download (https://www.nuget.org/).   We thank you for your support and appreciate your patience
in waiting for this update. Please get in touch with us if you require any
further assistanceRegards,Suja

Suthi Yuvaraj · Answer

Hi Felipe,We have checked the reported scenario from our
end. We have encountered the below crash on the Android platform with
SfPopupLayout version of 20.2.0.46 and Xamarin.Forms version as 5.0.0.2515.We would like to know that it is the crash that
you were facing. We have checked the stack trace and it is not from the
SfPopupLayout control. To meet your requirements, we recommend that you
navigate from popupview in viewmodel.cs to the main thread. We have attached
the code snippet and workable sample for your reference.Codesnippet:

//In ViewModel.cs
  private async void Navigate()
  {
      IsPopupOpen = false; 
      Device.BeginInvokeOnMainThread(async () =>
      await navigation_service.NavigateAsync("MainPage"));
  }

Also if we misunderstood your
requirement please revert us with more crash details , stack trace and an
illustration video or image to reproduce the issue. It will be more helpful for us to provide timely
solutions.Regards,Suthi Yuvaraj.Attachment: PopupWithPrism_dc5dfec8.zip

Felipe · Answer

Strangely the error doesn't happen if using MainThread from Xamarin Forms, but if using

Xamarin.Essentials.MainThread.BeginInvokeOnMainThread the same error persist

Codesnippet:

private async void Navigate()

{

IsPopupOpen = false;

Xamarin.Essentials.MainThread.BeginInvokeOnMainThread(async () => {

await navigation_service.NavigateAsync("MainPage");

});

}

Another important thing is it works nice if I try to navigate with a button in TitleView, it only crash if there's a navigation button inside popupview that is inside TitleView

Suthi Yuvaraj · Answer

Hi Felipe,We are able to reproduce the
reported crash with Xamarin.Essentials beginInvokeOnMainTheard() from our end.
We are in need of two more working days to validate the issue and discussed it
with the development team. We will update you with further details on or before
September 16, 2022. We appreciate your patience until then.Meanwhile, We encountered the
crash in until nuget version 18.1.0.* as you mentioned issue is not reproduced in 18.2.0.*,
Could please share the NuGet version of SfPopuplayout, in which the issue is not
reproduced?Regards,Suthi Yuvaraj.

Felipe · Answer

I was using SfPopupLayout version 18.2.0.46, for some reason I could reproduce the error in the sample, but it works on my app

Suthi Yuvaraj · Answer

Hi Felipe,We have logged a bug
report for the reported issue “Prism navigation in
PopupView that is inside NavigationPage.TitleView causes the app to crash in
Android". We will fix the issue and include the fix in our weekly
nuget which is scheduled on October 11, 2022. We will let you know once it is
released with the fix. Soon
we will share the bug report to track the status of the issue. We appreciate
your patience until then. Regards,Suthi Yuvaraj.

Suja Venkatesan · Answer

Hi Felipe,We would like to let you know that you can also track the
status of the report from the below link.  Feedback Link : https://www.syncfusion.com/feedback/37775/system-notsupportedexception-thrown-when-sfpopuplayout-is-load-inside-theDisclaimer: Inclusion of this solution in the weekly release
may change due to other factors including but not limited to QA checks and
works reprioritization.Regards,Suja