MainActivity.java, implementing AdMob via MoPub with LibGDX. See blog post for more info: https://sam.ink/2014/implementing-admob-in-robovm-via-mopub

gistfile1.java

public class MainActivity extends AndroidApplication {
	MoPubView mAdView;
	boolean adLoaded = false;
	boolean adShown = false;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
    	super.onCreate(savedInstanceState);

		RelativeLayout layout = new RelativeLayout(this);

		requestWindowFeature(Window.FEATURE_NO_TITLE);
		getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
				WindowManager.LayoutParams.FLAG_FULLSCREEN);
		getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);

		MyExampleGame game = new MyExampleGame();

		ShowAdListener show = new ShowAdListener();
		HideAdListener hide = new HideAdListener();

		show.setBase(this);
		hide.setBase(this);

		game.addListener(show);
		game.addListener(hide);

		View gameView = initializeForView(game, true);

		layout.addView(gameView);
		
		mAdView = new MoPubView(this);
		mAdView.setAdUnitId("00000000000000000000000000000"); // Your MoPub Ad Unit ID

		RelativeLayout.LayoutParams adParams = 
				new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT, 
						RelativeLayout.LayoutParams.WRAP_CONTENT);
		adParams.addRule(RelativeLayout.ALIGN_PARENT_TOP);
		adParams.addRule(RelativeLayout.CENTER_IN_PARENT);

		layout.addView(mAdView, adParams);

		setContentView(layout);
	}
	@Override
	public void onPause() {
		super.onPause();
	}

	@Override
	public void onResume() {
		super.onResume();
	}

	@Override
	public void onDestroy() {
		mAdView.destroy();
		super.onDestroy();
	}
	
	public void showAd() {
		runOnUiThread(new Runnable() {
			@Override
			public void run() {
				if(!adLoaded) {
					System.out.println("Ad Loaded!");
					mAdView.loadAd();
					adLoaded = true;
				}
				if(!adShown) {
					System.out.println("Ad Show!");
					mAdView.setVisibility(View.VISIBLE);
					adShown = true;
				}
			}
		});
	}
	
	public void hideAd() {
		if(adShown) {
			runOnUiThread(new Runnable() {
				@Override
				public void run() {
					mAdView.setVisibility(View.GONE);
					System.out.println("Ad Hide!");
					adShown = false;

				}
			});
		}
	}
}