onnxruntime/csharp/sample/Xamarin/FasterRcnnSample/FasterRcnnSample.Forms.Android/MainActivity.cs

using Android.App;
using Android.Content.PM;
using Android.Runtime;
using Android.OS;
using Microsoft.ML.OnnxRuntime;

namespace FasterRcnnSample.Forms.Droid
{
    [Activity(Label = "FasterRcnnSample.Forms", Icon = "@mipmap/icon", Theme = "@style/MainTheme", MainLauncher = true,
              ScreenOrientation = ScreenOrientation.Portrait,
              ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode |
                                     ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize)]
    public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);

            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
            global::Xamarin.Forms.Forms.Init(this, savedInstanceState);

            SessionOptionsContainer.Register(
                nameof(SessionOptionMode.Platform),
                (sessionOptions) => sessionOptions.AppendExecutionProvider_Nnapi(NnapiFlags.NNAPI_FLAG_USE_NONE));

            LoadApplication(new App());
        }

        public override void OnRequestPermissionsResult(int requestCode, string[] permissions,
                                                        [GeneratedEnum] Permission[] grantResults)
        {
            Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);

            base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }
}