Draw google map marker by json

public class Mappa extends Fragment {
         static final LatLng HAMBURG = new LatLng(53.558, 9.927);
         static final LatLng KIEL = new LatLng(53.551, 9.993);
         private GoogleMap map;
         private static final String LOG_TAG = "ExampleApp";



private static final String SERVICE_URL = "https:xxxxxxxxxxxxxxxxxxxxxxxx";

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    drawMarker();


}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View v = inflater.inflate(R.layout.fragment_mappa, null, false);

    //map = ((SupportMapFragment) getFragmentManager().findFragmentById(R.id.map))
           // .getMap();
    map = ((SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.map)).getMap();


    Marker hamburg = map.addMarker(new MarkerOptions().position(HAMBURG)
            .title("Hamburg"));
    Marker kiel = map.addMarker(new MarkerOptions()
            .position(KIEL)
            .title("Kiel")
            .snippet("Kiel is cool")
            .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE)));

    // Move the camera instantly to hamburg with a zoom of 15.
    //map.moveCamera(CameraUpdateFactory.newLatLngZoom(HAMBURG, 3));

    // Zoom in, animating the camera.
    //map.animateCamera(CameraUpdateFactory.zoomTo(3), 2000, null);

    //...
    drawMarker();

    return v;



}


public void drawMarker() {
    try {
        JSONObject  jsonRootObject = new JSONObject(SERVICE_URL);
        JSONArray jarray = jsonRootObject.getJSONArray("placemarks");

        for (int i = 0; i < jarray.length(); i++) {
            JSONObject object = jarray.getJSONObject(i);
            String lat = String.valueOf(object.getJSONArray("coordinates").getDouble(1));
            String lon = String.valueOf(object.getJSONArray("coordinates").getDouble(0));
            map.addMarker(new MarkerOptions()
                    .title("pippo")
                    .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE))
                    .position(new LatLng(
                            object.getJSONArray("coordinates").getDouble(1),
                            object.getJSONArray("coordinates").getDouble(0)
                    ))

            );
            Log.d("Lat", "valori"+ lat + ";" + lon);

        }
    } catch (JSONException e) {
        e.printStackTrace();
    }


}



@Override
public void onAttach(Activity activity) {
    super.onAttach(activity);
}

@Override
public void onDetach() {
    super.onDetach();
}
}