我试图用服务器中的新数据更新我的地图,但我无法弄清楚如何从地图中删除旧项目(标记和集群 – 使用ClusterManager)( – 在我看来,我只能在ClusterManager中添加.
我有BroadcastReceiver,当有新数据时它会获得意图.我正在尝试这样的事情:(但它在“… getMarkers().clear();”上给了我UnsupportedOperationException.“
private BroadcastReceiver myRefrestMapBroadcastReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context,Intent intent) {
Log.d(TAG,"onReceive");
mClusterManager.clearItems();
mClusterManager.getMarkerCollection().getMarkers().clear();
mClusterManager.getClusterMarkerCollection().getMarkers().clear();
mClusterManager.addItems(LocationGetter.getReports());
}
};
java.util.Collection<Marker> userCollection = mClusterManager.getMarkerCollection().getMarkers();
ArrayList<Marker> userList = new ArrayList<Marker>(userCollection);
// now is userList empty
for(Marker marker: userList){
marker.remove();
}
java.util.Collection<Marker> userCollection2 = mClusterManager.getClusterMarkerCollection().getMarkers();
ArrayList<Marker> userList2 = new ArrayList<Marker>(userCollection2);
// now is userList2 empty
for(Marker marker: userList2){
marker.remove();
}
mClusterManager.addItems(LocationGetter.getReports());
解决方法
根据ClusterManager
documentation,我们可以使用mClusterManager.cluster();
This method Force a re-cluster. You may want to call this after adding new item(s).
