Google-map work on emulator but doesn't on real device

Question

I applied the exact steps as mentioned in the google developer doc to create an example google map project and everything went fine on the emulator, but when I generated the pro

Answer 1

It is working on emulator on debug mode because you are using the Google Map Api key which is register with your debug.keystore file. To access Google Map into the real device you have to generate the Google Map key using the keystore file which you are using to generate the apk file.