GPS isProviderEnabled always return false

Question

I've got this code

 lm = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
 boolean isGPS = lm.isProviderEnabled (LocationManager.GPS_PROVIDER);

and it always return false, even when GPS is enabled. GPS is working correctly but I'm using this boolean value to show pop-up "No GPS enabled". In this situation pop-up is showing up every time

1. I checked similar questions but it doesn't help me.
2. Yes, i have permission in my manifest
3. I'm using this code in onResume method

Thanks for help.

Answer 1

If you are checking for the location is opened or not whatever it is using GPS or not, so you have to pay attention to the following as it was my case, in device location settings the locating method was set to BatterySaving mode, in which the device uses only WiFi mobile networks to estimate location:

Therefore, the GPS is not even used in update location, and so the location icon will not appear in the status bar in addition to the location provider will be stated as Network not GPS.

so, to solve that issue you have to check whether the provider contains gps or contains network:

private boolean checkIfLocationOpened() {
    String provider = Settings.Secure.getString(getActivity().getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
    if (provider.contains("gps") || provider.contains("network"))
        return true;
    }
    // otherwise return false
    return false;
}

and if you want to do it using the LocationManager:

private boolean checkIfLocationOpened() {
    final LocationManager manager = (LocationManager) getActivity().getSystemService(Context.LOCATION_SERVICE);
    if (manager.isProviderEnabled(LocationManager.GPS_PROVIDER) || manager.isProviderEnabled(LocationManager.NETWORK_PROVIDER)){
        return true;
    }
    // otherwise return false
    return false;
}