title: Google api map V2 not displaying with signed apk in device
body: <p>I am displaying MAP using google map Api V2 i successfully displayed it in device when am running through my PC but now i am signing my application via export signed apk and made as .keystore and .apk and it made a certificate and now i am using that apk file and runnning the application but the map does not displayed just showing white screen, even i made a release key using 
  <a href="http://developer.android.com/tools/publishing/app-signing.html" rel="nofollow">http://developer.android.com/tools/publishing/app-signing.html</a>  and i succesfully performed all the steps given in the link but then too the map is not displaying, please help.</p>
  
  <p>Thanks. </p>