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 gen
I had a similar issue and the problem was that I generated the apk from Android Studio without first selecting the right flavour. This means my manifest was still using the Google Maps API key that I created for the debug flavour.
Please make sure you select the release flavour in your Android Studio. See screenshot below: