MonoGame.Samples/Audio3D/Platforms/Android/MainActivity.cs

using Android.App;
using Android.Content.PM;
using Android.OS;
using Microsoft.Xna.Framework;

namespace Audio3D.Android
{
    [Activity(Label = "Audio3D", MainLauncher = true, ConfigurationChanges = ConfigChanges.Orientation | ConfigChanges.KeyboardHidden | ConfigChanges.ScreenSize, ScreenOrientation = ScreenOrientation.Landscape)]
    public class MainActivity : AndroidGameActivity
    {
        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            var g = new Audio3DGame();
            SetContentView((g.Services.GetService(typeof(View))) as View);
            g.Run();
        }
    }
}