title: Android: Google Map v2 not showing map for release apk
body: <p>My google map app works fine on device with debug google map API KEY but when I create signed apk for my app with release google map API KEY, it does not display map.
  To generate release mode google API KEY , i am using SHA1 fingerprint with my keystore.
  And i am also defining "signing and build types" in my project Settings as explained by developer.android.com(<a href="http://developer.android.com/tools/publishing/app-signing.html">http://developer.android.com/tools/publishing/app-signing.html</a>).</p>
  
  <p>Tried every possible solution(removing apk and than reinstalling it again, restarting the device, cleaning the project ). nothing worked. 
  Anybody have a good solution to my problem please help. 
  FYI  Using android studios platform.</p>