I recently updated one of my Android apps to use the
Android Maps API
modifications required to the code base go beyond changing packages from
com.google.android.gms.maps. With the Maps
client being part of the Google Play Services, any Android apps that use
Google Maps v2 must be setup to use the Google Play Services library. In
addition, the may also use a few utilities from the
Android Maps Utility library.
The Google Play Services Setup instructions for installing the library on Eclipse, Android Studio (or gradle-based IntelliJ), but for IntelliJ users who transition from Eclipse, the instructions lack some details.
See the details in the video below: