在 Android 中向 Google 地图添加自定义标记

Question

I have an Android App made with java with a Google Maps activity and I wanted to replace the "default sidney" market with a new marker with the LatLng that i am giving in by parameter, but i dont know how. I`ve tried this =>

public class MapsActivity2 extends FragmentActivity implements OnMapReadyCallback {

    private GoogleMap mMap;
    private double latitud;
    private double longitud;
private LatLng ubicacion;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps2);
        // Obtain the SupportMapFragment and get notified when the map is ready to be used.
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
    }


    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;

        // Add a marker in Sydney and move the camera
        LatLng sydney = ubicacion;
        mMap.addMarker(new MarkerOptions().position(sydney).title("Ubicacion Gasto"));
        mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney));
    }

    public void setearUbicacion(double lat, double longi){
         ubicacion = new LatLng(lat, longi);
    }
}

But the "ubicacion" variable is setted on null anyways. I don´t want to change the Style of the marker, i want to give the onMapReady method the LatLng by parameter instead of setting it up on the class directly like all the examples show.

Thanks in advance!

Answer 1

Market? or Marker? if Marker you can try this code

map.addMarker(new MarkerOptions()
   .position(new LatLng(latitude, longitude))                          
   .title("Title")
   .snippet("Snippet")
   .icon(BitmapDescriptorFactory.fromResource(R.drawable.my_icon)));

just add .icon(BitmapDescriptorFactory.fromResource(R.drawable.my_icon))

or changing colors of default marker .icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_AZURE))

Answer 2

public void onMapReady(GoogleMap googleMap) {
            mMap = googleMap;

            setLatLng(1.0,1.0);
   }

Try this. You have to call setLatLng method in onMapReady

public void setLatLng(double latitude , double longitude){
        LatLng location = new LatLng(latitude, longitude);
        mMap.addMarker(new MarkerOptions().position(location).title("Marker in Your Location"));
        mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(location,15));
    }