Creating a nested JSON object

Question

I am trying to create a complex nested object like this:

{
   "user":{
      "type":"facebook",
      "first_name":"harsha",
      "last_name":"mv",
      "gender":"male"
   },
   "friends":[
      {
         "id":"23",
         "name":"Vachana"
      },
      {
         "id":"23",
         "name":"Jyosna"
      },
      {
         "id":"23",
         "name":"Avinash"
      }
   ]
}

Android Java code:

    JSONObject user = new JSONObject();
    try {
        user.put("first_name", "harsha");
        user.put("last_name", "mv");
        user.put("gender", "mail");

        System.out.println(user);
    } catch (JSONException e1) {
        e1.printStackTrace();
    }

I want to nest the other objects as shown above. Can someone tell me how I can do it? What function or format do I need to use?

Solution 1

'friends' is a JSONArray, each of its items is a JSONObject. Just use put with a JSONObject or JSONArray as value. For arrays, you will have to specify the index as well.

Solution 2

There is a function in JSONObject

put(String string, Object value)

that takes in a JSONArray, of which you can make it an array of JSONObject's. I'd imagine your "friend" class could generate the JSONObject that is be put into the list.

Solution 3

Checkout these JSON encoding examples, so you can manage it easily through.

JSON Encoding

Solution 4

i am switching the subject, but insist you to use Gson as it maintain a all element in one class with runtime getter/setter

Solution 5

Use this Json jar file its automatically set and get the values according to tagnames(Ex:firstname,lastname etc) download and usage of jar file get from belo link

Android json jar file

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