小编ana*_*s59的帖子

我正在使用Firebase作为后端在android中构建一个简单的聊天应用程序.

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[] = myval.split(", ");

                    System.out.println(spmyval[0] + " <-sp0 sp1-> " + spmyval[1]);
                    list=new ArrayList();

                    a1 = spmyval[0].split("=");

                    Cursor cur = getContentResolver().query(
                            ContactsContract.Contacts.CONTENT_URI, null, null, null, null);
                    if (cur.getCount() > 0) {
                        while (cur.moveToNext()) {

                            // read id
                            String id = …