Parse.com将JSON对象添加到JSON数组 [英] Parse.com add JSON Object to JSON Array

问题描述

我的问题很简单，我想向存储在MongoDB数据库中的JSONArray添加JSONObject.我可以轻松添加所有类型的数据，例如Strings，Ints等，但不能添加JSONObjects. 我在代码中这样做:

My problem is simple, I'd like to add a JSONObject to a JSONArray that I store in a MongoDB database. I can easily add all types of data like Strings, Ints etc but not JSONObjects. I do this in my code :

public void done(ParseObject lan, ParseException e) {
    if(e==null){
       JSONObject object = new JSONObject();
       try{                                                   
            object.put("PlayerName","John");
            object.put("ID",514145);                                                  
            lan.add("Participants",object); //nothing gets inserted
            lan.add("Participants",15); //works fine
            lan.add("Participants",JSONObject.null); //works fine too
          }catch (JSONException error){

          }

          lan.increment("Number");
          lan.saveInBackground();
   }else{
          Log.i("Parse Error","error");
   }
}

但是我的数据库中什么也没有出现，也没有抛出任何错误. 你们对如何做有任何线索吗?

But nothing appears in my db and there's no error thrown. Do you guys have any clue on how to do that ?

推荐答案

尝试使用object.toString()而不是object.

lan.add("Participants", object.toString());

JSON:

{"Participants":["{\"PlayerName\":\"John\",\"ID\":514145}"]}

要解析此JSON，请尝试以下操作:

JSONObject jsonObj = new JSONObject(YOUR_JSON_STRING);

// Participants
JSONArray participantsJsonArray = jsonObj.getJSONArray("Participants");

// Participant
JSONObject participanJsonObject = participantsJsonArray.getJSONObject(0);

// PlayerName
String playerName = participanJsonObject.getString("PlayerName");
// ID
String id = participanJsonObject.getInt("ID");

希望这会有所帮助〜

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