Google Maps showing on emulator, but not on a device
问题 I wrote a basic map application, the one that an be easily instantiated with AndroidStudio. The only difference the fragment is loaded inside another custom layout. package com.wayl.activities; import android.os.Bundle; import android.support.v4.app.FragmentManager; import android.support.v7.app.AppCompatActivity; import com.google.android.gms.maps.CameraUpdateFactory; import com.google.android.gms.maps.GoogleMap; import com.google.android.gms.maps.SupportMapFragment; import com.google