1. @Override
            public void onCreate(Bundle savedInstanceState) {
              super.onCreate(savedInstanceState);
              Window window = getWindow();
              RelativeLayout adsLayout = new RelativeLayout(this);
              RelativeLayout.LayoutParams lp2 = new RelativeLayout.LayoutParams(
                     RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.FILL_PARENT);
               // Displays Ads at the bottom of your sketch, use Gravity.TOP to display them at the top
              adsLayout.setGravity(Gravity.BOTTOM);
              AdView adView = new AdView(this, AdSize.BANNER, "a14******");  // add your app-id
              adsLayout.addView(adView);
              AdRequest newAdReq = new AdRequest();
              // Remark: uncomment next line for testing your Ads (fake ads)
              newAdReq.setTesting(true);
              adView.loadAd(newAdReq);
              window.addContentView(adsLayout,lp2);
        }

How to make it work? Thank you for your help ;).