android - Removing ChildEventListener -

i'm using firebase childeventlistener added n-number of times node data db.

now i'm trying remove childeventlistener , not seem work , duplicate data.

    query = firebasedatabase.getinstance().getreference()             .child("chat")             .child("room-messages")             .child(roomid)             .orderbychild("timestamp")             .limittolast(index);      paginationlistener = query.addchildeventlistener(new childeventlistener() {         @override         public void onchildadded(datasnapshot datasnapshot, string s) {             log.d(tag, datasnapshot.getkey() + " - single value");             try {                 message message = datasnapshot.getvalue(message.class);                 message.setid(datasnapshot.getkey());                 eventbus.getdefault().post(new getpaginatedmessage(message));             } catch (runtimeexception e) {                 log.d(tag, "type cast exception caught");             }          } 

and removing listener like

 if (query != null && paginationlistener != null) {         query.removeeventlistener(paginationlistener);     } 

it doesn't seem work , duplicate data. appriciated

calling removeeventlistener() removes listener location. not fire events data received after call it. may still fire events data it's received.

jonny's answer on firebase-talk group same behavior:

events queued asynchronously , potentially run on different thread, there might have been events queued before call removeeventlistener.