Question

我正在尝试获取Firebase的一些数据。我想做orderby（）。equalTo（）但我总是在查询中得到null。我尝试过两个值deliverBy（boolean）和deliverBy（long）。

查询

 queryFirebase = FirebaseDatabase.getInstance().getReference().child("rooms").orderByChild("read").equalTo(false);
        queryFirebase.addListenerForSingleValueEvent(new ValueEventListener() {

将我的消息发送到Firebase

Long userId = ApplicationConfig.getCurrentUser().getId();
            String toServerUnicodeEncoded = StringEscapeUtils.escapeJava(etMessage.getText().toString());
            MessageFirebase message = new MessageFirebase(toServerUnicodeEncoded, new DateTime().toString("yyyy-MM-dd'T'HH:mm:ss'Z'"), userId);
            DatabaseReference messageRef = mFirebaseDatabaseReference.push();
            messageRef.setValue(message);

MY JSON

{
  "rooms" : {
    "-KtMBWKEf7-Ot8HdMtbd" : {
      "-KtMC7CglZZ-Yp4_PQOU" : {
        "blocked" : false,
        "createDate" : "2017-09-06T14:40:17Z",
        "delivered" : false,
        "deliveredBy" : 317,
        "difDays" : 0,
        "isBlocked" : false,
        "message" : "hola",
        "read" : false
      },
      "-KtMCCdbKzP7UKFTB_qG" : {
        "blocked" : false,
        "createDate" : "2017-09-06T14:40:39Z",
        "delivered" : false,
        "deliveredBy" : 317,
        "difDays" : 0,
        "isBlocked" : false,
        "message" : "que tal",
        "read" : false
      },
      "commerceId" : 218,
      "userId" : 317
    }
  }
}

Answer 1

read不是rooms

的直接子女

你应该做

queryFirebase = FirebaseDatabase.getInstance().getReference()
    .child("rooms")
    .child("-KtMBWKEf7-Ot8HdMtbd")
    .orderByChild("read")
    .equalTo(false);
queryFirebase.addListenerForSingleValueEvent(new ValueEventListener() {

在Firebase

1 个答案: