Android - My app can get location information until opening Google Maps although it has related permissions

Question

I am new in Android development. So my question may be too basic. Sorry for this. Now I am maintaining a previously written code.

This application use the location s

Answer 1

Basically it means that you try to retrieve location via mFusedLocationClient.getLastLocation() and there is no location on device at this time. So you need to request location updates , like mFusedLocationClient.requestLocationUpdates. This links will be useful https://developer.android.com/training/location/receive-location-updates?hl=es and https://github.com/googlesamples/android-play-location