android - My emulator shows google map location but on device I am only seeig google map it is not fetching location -

my google map code works fine in emulator showing location. on running on device see google map not showing me exact location

the reasons map not coming can :

1. network issue (check internet access in device).
2. check whether api key , keystore matching.

check logcat , see error showing on there when try launch map.