title: Google Maps are not showing up in a signed apk
body: <p>I know this is a common question and usually the solution is to generate a separate key for release. I've done it several times and my API key in developers console contains two different SHA1-fingerprints: one for debug from AndroidStudio and on for release from my own keystore. I have signed the app with the same keystore and enabled Google Maps Android API v2 in the console. But still the maps activity shows just the white screen with 'Google' in the left bottom corner.</p>
  
  <p>Are there any suggestions how to solve the problem?</p>