The android UI gets distorted whenever the admob ads show up. And this happens on screens,
This is an open issue reported to android issue tracker check
Rendering glitch on View since Android 4.4.3. https://code.google.com/p/android/issues/detail?id=70914
As a workaround which I also have in my apps is setting a layertype
yourView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
or
yourView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
In my testing both solved the issue. You may need to add checks for android version as setLayerType was added in API 11 if you are supporting apps all the way to GingerBread
Go to Androidmanifest file and add the below line of code, it will work
<application android:hardwareAccelerated="true" <activity android:hardwareAccelerated="false" </activity> </application>