Meet in the Middle: Android Version Finally
Need to create your own google_maps_api.xml in debug/res/values. Create the folders if they don't exist. Here are the instructions: https://developers.google.com/maps/documentation/android-api/start Under "Step 4. Get a Google Maps API key"
Due to the necessity of the GPS, you need to develop this app with a real device or with an emulator that has google play services installed on it.