GoogleMaps API无法获取当前的纬度和经度

Question

I'm trying to get the coordinates but without success. The result is 0 . But when I write:

googleMap.setMyLocationEnabled(true);

I can see the blue dot. I'm trying to get these values with this code:

lat = googleMap.getMyLocation().getLatitude();
lng = googleMap.getMyLocation().getLongitude();

After that, lat and lng are 0.

My whole code:

public class GPS_maps extends Activity {
    // Google Map
    private GoogleMap googleMap;
    static Location currentLocation;
    static double lat , lng;
    TextView coordinates;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.map);
        coordinates = (TextView) findViewById(R.id.txt_coordinates);
        try {
            // Loading map
            initilizeMap();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void initilizeMap() {
        if (googleMap == null) {            
            googleMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
            // googleMap.setMyLocationEnabled(true);
            lat = googleMap.getMyLocation().getLatitude();
            lng = googleMap.getMyLocation().getLongitude();
            coordinates.setText(String.valueOf(lat) +" , " +String.valueOf(lng));
            LatLng coordinate = new LatLng(lat, lng);
            CameraUpdate yourLocation = CameraUpdateFactory.newLatLngZoom(coordinate, 5);
            googleMap.animateCamera(yourLocation);
            if (googleMap == null) {
                Toast.makeText(getApplicationContext(),
                    "Unable to create maps", Toast.LENGTH_SHORT)
                    .show();
            }
        }
    }

    @Override
    protected void onResume() {
        super.onResume();
       initilizeMap();
    }}
}

I don't get any errors. Where is my mistake?

Answer 1

Try the following:

Remove static modifier from the declaration of lat, lan. Make sure you are sending in the correct syntax to setCoordiante. To make sure the lat and lan are right, print them out right after you get them.