In terminal used keytool to list code signing SHA-1 fingerprint for debug builds.
    keytool -list -v -keystore ~/.android/debug.keystore -alias androiddebugkey -storepass android -keypass android
In the Google APIs Console created an API project
Selected services
Google Maps Android API v2
Created new Android key
In AndroidManifest.xml meta-data replaced placeholder with api key. Add a second meta-data tag, one per name/value pair.

Now app shows map, zoomed out to show ~ half of earth.

References
https://developers.google.com/maps/documentation/android/start
https://developers.google.com/maps/documentation/android/start#obtain_a_google_maps_api_key
http://developer.android.com/tools/publishing/app-signing.html