如何让我的谷歌地图放大到我当前的位置？

Question

嗨,我想让我的地图放大到我当前的位置.当前通过向仿真器发送lat和long来定义当前位置.我该怎么做呢？

我目前的mapactivity.java

public class MapsActivity extends MapActivity {

    private MapView mapView;
    private MyLocationOverlay myLocOverlay;
    MapController mc;

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.mapactivity);
        initMap();
        initMyLocation();


    }

    /**
     * Initialise the map and adds the zoomcontrols to the LinearLayout.
     */
    private void initMap() {
        mapView = (MapView) findViewById(R.id.mapView);

        View zoomView = mapView.getZoomControls();
        LinearLayout myzoom = (LinearLayout) findViewById(R.id.zoom);
        myzoom.addView(zoomView);
        mapView.displayZoomControls(true);
        mapView.getController().setZoom(17);
    }

    /**
     * Initialises the MyLocationOverlay and adds it to the overlays of the map
     */
    private void initMyLocation() {
        myLocOverlay = new MyLocationOverlay(this, mapView);
        myLocOverlay.enableMyLocation();
        mapView.getOverlays().add(myLocOverlay);

    }

    @Override
    protected boolean isRouteDisplayed() {
        return false;
    }

谢谢.

Answer 1

尝试在initMyLocation代码的末尾添加:

controller = mapView.getController();
mMyLocOverlay.runOnFirstFix(new Runnable() {
            public void run() {
                controller.setZoom(17);
                controller.animateTo(mMyLocOverlay.getMyLocation());
            }
        });

您可以从initMap方法中删除此行:

mapView.getController().setZoom(17);

如果有效,请告诉我

GER

Answer 2

您需要实现 onLocationChanged()。在我的代码中，我也在这里添加了覆盖层。至少你需要 setCenter() 与你当前的位置

public void onLocationChanged(Location location) {

   List<Overlay> overlays = mapView.getOverlays();
   myLocOverlay = new MyLocationOverlay(this, mapView);
   overlays.add(myLocOverlay);
   myLocOverlay.enableMyLocation();*

   // definitely need what's below
   int lat = (int) (location.getLatitude() * 1E6);
   int lng = (int) (location.getLongitude() * 1E6);
   GeoPoint point = new GeoPoint(lat, lng);
   mc.setCenter(point);
   mapView.invalidate();

}