Splash Screen disappeared after Application.OnCreate was overridden - xamarin.android

Question

Initial Issue
I need to register ProcessLifecycleOwner as described here Xamarin.Android Architecture Components in my Application.OnCreate method.
But it had resulted in the error with 6.2.2 version of MvvmCross:
MvvmCross.Exceptions.MvxIoCResolveException: Failed to resolve type MvvmCross.ViewModels.IMvxAppStart occurred
or just stuck on the Splash Screen with 6.2.3.
Fix
Those problems were fixed by advice from Xamarin.Android mvvmcross app crashes when launching with intent filter.
[Application]
public class App : MvxAndroidApplication<Setup, Core.App>
{
public App(IntPtr reference, JniHandleOwnership transfer) :
base(reference, transfer) { }
public override void OnCreate()
{
MvxAndroidSetupSingleton
.EnsureSingletonAvailable(ApplicationContext)
.EnsureInitialized();
base.OnCreate();
}
}
Current Issue
However Splash Screen dissapeared too, only blue background from default theme was left.
A workaround I've found:
public override void OnCreate()
{
Task.Run(() => MvxAndroidSetupSingleton
.EnsureSingletonAvailable(ApplicationContext)
.EnsureInitialized());
base.OnCreate();
}
But due to parallelism it is not reliable, sometimes works, sometimes crashes.
Question
How Splash Screen can be restored?

Answer 1

Your approach is most likely blocking on the UI thread which us causing the UI to block during the time that the expected splash screen is suppose to show.
Try using an async event handler to allow for a non blocking UI call
[Application]
public class App : MvxAndroidApplication<Setup, Core.App> {
public App(IntPtr reference, JniHandleOwnership transfer) :
base(reference, transfer) {
EnsureInitialized = onEnsureInitialized; //Subscribe to event
}
private event EventHandler EnsureInitialized = delegate { };
private async void onEnsureInitialized(object sender, EventArgs args) {
await Task.Run(() => MvxAndroidSetupSingleton.EnsureSingletonAvailable(ApplicationContext)
.EnsureInitialized());
}
public override void OnCreate() {
EnsureInitialized(this, EventArgs.Empty); //Raise event
base.OnCreate();
}
}