public class MyActivity extends AppCompatActivity { … private AdSize getFullWidthAdaptiveSize() { Display display = getWindowManager().getDefaultDisplay(); DisplayMetrics outMetrics = new DisplayMetrics(); display.getMetrics(outMetrics); float widthPixels = outMetrics.widthPixels; float density = outMetrics.density; int adWidth = (int) (widthPixels / density); return AdSize.getCurrentOrientationAnchoredAdaptiveBannerAdSize(this, adWidth); } }