RegisterTypes not working for platform specific component (Android)

[anzeko123]

Hello,

I am migrating from Xamarin.Forms to .NET MAUI and I need to initialize a component when the activity is created (OnCreate). In Xamarin.Fomrs you used LoadApplication and also IPlatformInitializer. Here in .NET MAUI you can't use LoadApplication and also IPlatformInitializer. Replacement for IPlatformInitializer is to register the RegisterTypes in MauiProgram.cs. There I use UsePrism and follow the instructions in this documentation. After that I still can't figure out how to initialize this component. I also tried .NET MAUI builder.Services.AddTransient but it didn't work.

This is my MauiProgram.cs code

public static class MauiProgram
{
	public static MauiApp CreateMauiApp()
	{
		var builder = MauiApp.CreateBuilder();
        builder
            .UseMauiApp<App>()
            .UsePrism(prism => {
                prism.RegisterTypes(container => {
#if ANDROID
                    container.Register<AndroidInitializer>();
#endif
                });
            })
            .UseBarcodeReader()
            .UseSkiaSharp()
            .ConfigureFonts(fonts => {
                fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
                fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");

                fonts.AddFont("Font Awesome 6 Brands-Regular-400.otf", "Font Awesome 6 Brands-Regular-400");
                fonts.AddFont("Font Awesome 6 Free-Regular-400.otf", "Font Awesome 6 Free-Regular-400");
                fonts.AddFont("Font Awesome 6 Free-Solid-900.otf", "Font Awesome 6 Free-Solid-900");

                fonts.AddFont("Southern Beach.otf", "Beach");

            }).ConfigureEffects(effects => {
                effects.Add<ColorOverlayEffect, ColorOverlayPlatformEffect>();
            });
#if DEBUG
        builder.Logging.AddDebug();
#endif

		return builder.Build();
	}
}

This is my AndroidInitializer where I Initialize my component in RegisterTypes

    public class AndroidInitializer : IAndroidInitializer {
        public MainActivity MainActivity { get; }

        public AndroidInitializer() {
        }

        public AndroidInitializer(MainActivity mainActivity) {

            MainActivity = mainActivity;
        }

        public void RegisterTypes(IContainerRegistry containerRegistry)
            {
            containerRegistry.RegisterInstance(typeof(INotificationService), new AndroidNotificationService(Android.App.Application.Context, MainActivity));
        }
    }

This is my IAndroidInitializer where I define the RegisterTypes, which is kinda just a copy of IPlatformInitializer from Xamarin.Forms.

    public interface IAndroidInitializer
    {
        void RegisterTypes(IContainerRegistry containerRegistry);
    }

This is my MainActivity where I call OnCreate and also where in Xamarin.Forms the LoadApplication was located.

public class MainActivity : MauiAppCompatActivity {
    protected override void OnCreate(Bundle bundle) {
        base.OnCreate(bundle);
        new AndroidInitializer(this);
    }
//also tried doing this
    //protected override void OnResume() {
    //    base.OnResume();

    //    Platform.OnResume();
    //    new AndroidInitializer(this);
   // }

      //protected override void OnNewIntent(Intent intent) {
     //   base.OnNewIntent(intent);
    //
    //    Platform.OnNewIntent(intent);
    //}
}

Can you help me with this?

Thank you,
Anzeko