gpss

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M
                && checkSelfPermission(android.Manifest.permission.ACCESS_COARSE_LOCATION)
                != PackageManager.PERMISSION_GRANTED
                && checkSelfPermission(android.Manifest.permission.ACCESS_FINE_LOCATION)
                != PackageManager.PERMISSION_GRANTED) {
            requestPermissions(
                    new String[]{android.Manifest.permission.ACCESS_COARSE_LOCATION,
                            android.Manifest.permission.ACCESS_FINE_LOCATION},
                    100);



        } else {
            try {
                //detect location based gps
                gps = new GPSTracker(MapsActivity.this);
                if (gps.canGetLocation()) {
                    double latitude = gps.getLatitude();
                    double longitude = gps.getLongitude();
                    mMap.clear();
                    LatLng posisi_user = new LatLng(latitude, longitude);
                    mMap.addMarker(new MarkerOptions().position(posisi_user).
                            title("posisi anda"));
                    NurHelper.showSettingGps(MapsActivity.this);


                } else {


                }
            } catch (NullPointerException e) {

            }
        }