百度地图移动到指定点

求解，在oncreate的时候，设置地图中心在北京天安门，之后再调用mapController.setCenter来移动到别的地方，为什么地图没反应，但是当触摸手机的时候突然的就跳到了指定的点，如何去设置？？？
求高手解答！！
public class MyOverLay extends Overlay {
private GeoPoint geoPoint = null;
public MyOverLay(int x, int y) {
// TODO Auto-generated constructor stub
geoPoint = new GeoPoint(x, y);
}
//coonstruct the point on the map

//define a paint tool
private Paint paint = new Paint();
@Override
public void draw(Canvas arg0, MapView arg1, boolean arg2) {
// TODO Auto-generated method stub
super.draw(arg0, arg1, arg2);

Point point = mapView.getProjection().toPixels(geoPoint, null);
arg0.drawText("*ME*", point.x, point.y, paint);
// mapController = mapView.getController();
// mapView.invalidate();
// mapController.setCenter(this.geoPoint);

// mapController.animateTo(this.geoPoint);
}
}

private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {

@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Log.d(TAG, "onReceive");
String action = intent.getAction();
Log.d(TAG, "recv action: " + action);
if(action.equals(MIRROR_SERVER)) {
//...
int x = intent.getIntExtra("POINTX", 0);
int y = intent.getIntExtra("POINTY", 0);
Log.d(TAG, "x: " + x + ", y: " + y);
mapView.getOverlays().add(new MyOverLay(x, y));
GeoPoint geoPoint = new GeoPoint(x, y);
geoPoint = new GeoPoint(x, y);
mapController.setCenter(geoPoint);
// mapController.animateTo(geoPoint);
}
}
};

当我得到broadcast发来的点信息的时候我要在该点画上一个符号，然后地图移动到这个点，但是调用了setCentre地图不动