node.js - Firebase change data from server, listen on Android -

i'm playing firebase. updating data in server node.js:

var db = firebase.database() var ref = db.ref("game") ref.update({     "state": "state",     "counter": counter }) 

the data in firebase console updated without problem in android, can't retrieve change. want listen "game" node's changes no luck.

databasereference database = firebasedatabase.getinstance().getreference(); databasereference ref = database.child("game");  ref.addchildeventlistener(new childeventlistener() {     @override     public void onchildadded(datasnapshot datasnapshot, string s) {         log("1");     }      @override     public void onchildchanged(datasnapshot datasnapshot, string s) {         log("2");     }      @override     public void onchildremoved(datasnapshot datasnapshot) {         log("3");     }      @override     public void onchildmoved(datasnapshot datasnapshot, string s) {         log("4");     }      @override     public void oncancelled(databaseerror databaseerror) {         log("5");     } }); 

there no log in console.

also, valueeventlistener i'm still not seeing change or error:

databasereference ref = database.child("game");  ref.addvalueeventlistener(new valueeventlistener() {     @override     public void ondatachange(datasnapshot datasnapshot) {         log("1");     }      @override     public void oncancelled(databaseerror databaseerror) {         log("2");     } }); 

i'm doing wrong. how can listen data changes in firebase?

i 'solved' issue re-logging user. guess bug.

relevant: firebase single value event listener doesn't return