gistfile1.cs

namespace LibIronshodSharp
{
	public enum BannerAdPosition
	{
		None,
		TopCenter
	}
}

using System;
using Android.App;
using Android.Gms.Ads;
using Android.Views;
using Android.Widget;

// ReSharper disable once CheckNamespace
namespace LibIronshodSharp
{
	public static class AdManager
	{
		private static AdView _adView;
		private static BannerAdPosition _currentBannerAdPosition = BannerAdPosition.None;

		public static void CreateAndSetContentView(Activity activity, Android.Views.View view, string adUnitId, string[] testDeviceIds)
		{
			var frameLayout = new FrameLayout(activity);
			var linearLayout = new LinearLayout(activity);

			linearLayout.Orientation = Orientation.Horizontal;
			linearLayout.SetGravity(GravityFlags.CenterHorizontal | GravityFlags.Top);

			frameLayout.AddView(view);

			_adView = new AdView(activity);
			_adView.AdUnitId = adUnitId;
			_adView.AdSize = AdSize.Banner;

			linearLayout.AddView(_adView);
			frameLayout.AddView(linearLayout);
			activity.SetContentView(frameLayout);

			// Initiate a generic request.
			var adRequest = new AdRequest.Builder()
				.AddTestDevice(AdRequest.DeviceIdEmulator);
			foreach (var id in testDeviceIds)
				adRequest.AddTestDevice(id);

			// Load the adView with the ad request.
			_adView.LoadAd(adRequest.Build());

			_adView.Visibility = ViewStates.Gone;
		}

		internal static void Update(BannerAdPosition bannerAdPosition, float dt)
		{
			if (bannerAdPosition == _currentBannerAdPosition)
				return;
			
			switch (bannerAdPosition)
			{
				case BannerAdPosition.None:
					_adView.Visibility = ViewStates.Gone;
					break;
				case BannerAdPosition.TopCenter:
					_adView.Visibility = ViewStates.Visible;
					break;
				default:
					throw new Exception();
			}

			_currentBannerAdPosition = bannerAdPosition;
		}

		internal static void Draw(BannerAdPosition bannerAdPosition)
		{
			//Do nothing
		}
	}
}