MapsKart class

public class MapsKart { private GoogleMap map; //тело программы public void makMarkers() { map.addMarker(new MarkerOptions().position(new LatLng(0,0))); } }

Class MainActivity

 public class MainActivity extends AppCompatActivity { private static final String LOG_TAG = "MarkApp"; MapsKart mapsKart; private SupportMapFragment mapFragment; private GoogleMap map; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map); //вот здесь пытаюсь вывести map = mapFragment.getMap(); mapsKart.makMarkers(); } }

in the log. swears at a zero object

  java.lang.NullPointerException: Attempt to invoke virtual method 'void com.example.admin.busstop.MapsKart.makMarkers()' on a null object reference

    1 answer 1

    You have not initialized mapsKart

     mapsKart = new MapsKart(); mapsKart.setMap(map); //Ну или каким другим образом задаем в нем map mapsKart.makMarkers();