I have generated a Google Maps API key for my Android application. It works perfectly fine.
Before some days ago i format my computer,but i stored my map api key.
Now when i apply this in my another android project strangely, the map view doesn’t display anything but empty grids.
Note that I’ve allowed all the permissions in the manifest file.
you have to regenerate the MD5 Fingerprint in order to resolve this issue. as your debug.keystore is now different.