如何使用openstreetmap获取我的职位

Question

这是我获得职位的代码：

IMyLocationProvider ilp = new IMyLocationProvider() {
        @Override
        public void stopLocationProvider() {
        }
        @Override
        public boolean startLocationProvider(IMyLocationConsumer arg0) {
            return false;
        }
        @Override
        public Location getLastKnownLocation() {
            return null;
        }
    };
MyLocationNewOverlay myLocationOverlay = new MyLocationNewOverlay(getApplicationContext(), ilp,mMapView);
mMapView.getOverlays().add(myLocationOverlay);
myLocationOverlay.enableMyLocation(ilp);
myLocationOverlay.enableFollowLocation();

但结果是屏幕变蓝了没有地图，哪里出错了？