The source code to the Coverage Map Android app
https://play.google.com/store/apps/details?id=se.pcprogramkonsult.coveragemap
To be able to compile and run, a Google Maps API key is needed, one for debug and one for release builds.
Please see the following template files for more information:
https://github.com/googlemaps/android-samples/blob/master/ApiDemos/java/app/src/debug/res/values/google_maps_api.xml https://github.com/googlemaps/android-samples/blob/master/ApiDemos/java/app/src/release/res/values/google_maps_api.xml