MonoGame.Samples/GameDevelopmentbyExample/RobotRampage/Platforms/Android/MainActivity.cs

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

namespace RobotRampage.Android
{
    [Activity(
        Label = "RobotRampage",
        MainLauncher = true,
        Icon = "@mipmap/icon",
        Theme = "@style/MainTheme",
        ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation | ConfigChanges.UiMode | ConfigChanges.ScreenLayout | ConfigChanges.SmallestScreenSize,
        ScreenOrientation = ScreenOrientation.Landscape
    )]
    public class MainActivity : AndroidGameActivity
    {
        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            var game = new RobotRampageGame();
            SetContentView((game.Services.GetService(typeof(View)) as View));
            game.Run();
        }
    }
}