google maps开发当前位置定位问题！

public class MallFinderActivity extends MapActivity implements LocationListener {
    /** Called when the activity is first created. */
   private LocationManager locationManager;
   private GeoPoint currentLocation;

  public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
     MapView   mapView;
     MapController mapController;
        setContentView(R.layout.main);
        mapView = (MapView)findViewById(R.id.mapView);
        mapView.setBuiltInZoomControls(true);
        mapView.setSatellite(false);
        mapView.setStreetView(true);
        mapController = mapView.getController();
        mapController.setZoom(13);
    getLastLocation();
    animateToCurrentLocation();
}

  protected boolean isRouteDisplayed(){
      return false;
    }
  public void getLastLocation(){
    String provider = getBestProvider();
    currentLocation = locationManager.getLastKnownLocation(provider);
    if(currentLocation != null){
        setCurrentLocation(currentLocation);
    }
    else
    {
        Toast.makeText(this, "Location not yet acquired", Toast.LENGTH_LONG).show();
    }
}

public void animateToCurrentLocation(){
    if(currentPoint!=null){
        MapController.animateTo(currentPoint);
    }
}

public String getBestProvider(){
    locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
    Criteria criteria = new Criteria();
    criteria.setPowerRequirement(Criteria.NO_REQUIREMENT);
    criteria.setAccuracy(Criteria.NO_REQUIREMENT);
    String bestProvider = locationManager.getBestProvider(criteria, true);
    return bestProvider;
}

public void setCurrentLocation(Location location){
    int currLatitude = (int) (location.getLatitude()*1E6);
    int currLongitude = (int) (location.getLongitude()*1E6);
    currentLocation = new GeoPoint(currLatitude,currLongitude);

    currentLocation = new Location("");
    currentLocation.setLatitude(currentPoint.getLatitudeE6() / 1e6);
    currentLocation.setLongitude(currentPoint.getLongitudeE6() / 1e6);
}

这是找的源代码！有几个地方比较模糊！ Google Maps --------------------编程问答-------------------- 红的地方处理我看不懂！！ MapController.animateTo(currentPoint); 这个方法的参数用法比较模糊！ --------------------编程问答-------------------- 做个google maps的来帮帮忙! --------------------编程问答-------------------- 大神来啊！！

补充：云计算 ,  OpenAPI