在Google Maps中使用新的OnMyLocationChangeListener Android API v2

Question

Google終於在Android API v2中添加了位置更改的回調！但是，我無法直觀地使其發揮作用，Google沒有太多的文檔。有沒有人得到它的工作？我還需要什麼？

public class ... extends SupportMapFragment implements GoogleMap.OnMyLocationChangeListener { 
GoogleMap map; 
LocationManager locationManager; 
String provider; 

     @Override 
     public void onActivityCreated(android.os.Bundle savedInstanceState) { 
      super.onActivityCreated(savedInstanceState); 
      map = getMap(); 
        if (map != null) { 
         Criteria criteria = new Criteria(); 
         criteria.setAccuracy(Criteria.ACCURACY_FINE); 
          locationManager =(LocationManager)getActivity().getSystemService(Context.LOCATION_SERVICE); 
       provider = locationManager.getBestProvider(criteria, false); 
      } 
     } 

     @Override 
     public void onResume() { 
      super.onResume(); 
      while(map == null) { 
       map = getMap(); 
       map.setMyLocationEnabled(true); 
       map.setOnMyLocationChangeListener(this); 
      } 
     } 
     @Override 
     public void onMyLocationChange(Location loc) { 
      //implementation 
     } 
} 

Answer 1

當我們獲得第一個位置更新時，這就是我如何導航到地圖的中心。

我的類標頭：

public class FragActivity extends SherlockFragmentActivity implements OnMyLocationChangeListener 

private GoogleMap mMap; 

我的MMAP-設置：

if (mMap == null) { 
     // Try to obtain the map from the SupportMapFragment. 
     mMap = customMapFragment.getMap(); 

     // Check if we were successful in obtaining the map. 
     if (mMap != null) 
      setUpMap(); 
    } 

setUpMap-方法：

private void setUpMap() { 
    mMap.setMyLocationEnabled(true); 
    mMap.setOnMyLocationChangeListener(this); 
} 

和我的onlocationchange：

@Override 
public void onMyLocationChange(Location lastKnownLocation) { 
    CameraUpdate myLoc = CameraUpdateFactory.newCameraPosition(
      new CameraPosition.Builder().target(new LatLng(lastKnownLocation.getLatitude(), 
        lastKnownLocation.getLongitude())).zoom(6).build()); 
    mMap.moveCamera(myLoc); 
    mMap.setOnMyLocationChangeListener(null); 
} 

作品像一個魅力