android - 安卓Why the InfoWindow position was not equal to Marker position?

Question

我只是按照谷歌开发指南做一个带有标记的简单地图，但我发现了问题。在 LG-G pro 和 Sony Z 上测试。InfoWindow 与标记不在同一个地方。任何人都可以帮忙吗？

public class MainActivity extends Activity {
private GoogleMap mMap;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mMap = ((MapFragment) getFragmentManager().findFragmentById(R.id.map)).getMap();
    LatLng MELBOURNE = new LatLng(-37.81319, 144.96298);
    Marker melbourne = mMap.addMarker(new MarkerOptions()
                              .position(MELBOURNE)
                              .title("Melbourne")
                              .snippet("Population: 4,137,400"));
}