In order to show the Google AdMob banners, we need to add the
Google Play Services library to our project. In order to do this, we first need to download it and its dependency, the Android Support Library, by using the Android SDK Manager:
After you have successfully downloaded the Google Play Services and its dependencies, you will need to add the Android.support.v4 to your project, since it is required by the Google Play Services library. For this, we are going to copy the
android-support-v4.jar file located on the following path:
<ADT PATH>\sdk\extras\android\support\v4 to the
libs folder contained in our Android project, ...