Firebase one to one chat
问题 I am building a simple chat application in android with Firebase as backend. ref3.addValueEventListener(new ValueEventListener() { @Override public void onDataChange(DataSnapshot snapshot) { Map<String, Object> users = (Map<String, Object>) snapshot.getValue(); System.out.println(users.values().toString()); Set s = users.entrySet(); Iterator itr = s.iterator(); while (itr.hasNext()) { Map.Entry m = (Map.Entry) itr.next(); m.getKey(); String myval = m.getValue().toString(); String spmyval[] =