private void checkEnableGPS() {
        String provider = Settings.Secure.getString(getContentResolver(), Settings.Secure.LOCATION_PROVIDERS_ALLOWED);
        if (!provider.equals("")) {
            if (Build.VERSION.SDK_INT >= 23) {
                checkForContactsPermissions();
            }
            else{
                 //Действие (получение координат).
            }
        }
        else{
            Intent gpsOptionsIntent = new Intent(android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS);
            startActivity(gpsOptionsIntent);
        }
    }

    private void checkForContactsPermissions() {
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            requestContactsPermissions();
        } else {
            //Действие (получение координат).
        }
    }

    private void requestContactsPermissions() {
        String[] gps = {Manifest.permission.ACCESS_FINE_LOCATION};
        ActivityCompat.requestPermissions(this, gps, 1);
    }