How to create JSON format data in android?

Question

I need to pass some parameters to server that i need to pass as below format

{
  "k2": {
    "mk1": "mv1",
    "mk2": [
      "lv1",
      "lv2"
    ]
  }
}

So how can generate this format in android.

I tried this using the As shown in example 5.3 but it is showing a error at obj.writeJSONString(out); this line. Can anyone please help in solving this.

Thanks In Advance

Answer 1

Its not that though at all, output you want is JSONArray inside JSONObject and JSONObject inside another JSONObject. So, you can create them seperately and then can put in together. as below.

try {
            JSONObject parent = new JSONObject();
            JSONObject jsonObject = new JSONObject();
            JSONArray jsonArray = new JSONArray();
            jsonArray.put("lv1");
            jsonArray.put("lv2");

            jsonObject.put("mk1", "mv1");
            jsonObject.put("mk2", jsonArray);
            parent.put("k2", jsonObject);
            Log.d("output", parent.toString(2));
        } catch (JSONException e) {
            e.printStackTrace();
        }

Output-

       {
           "k2": {
             "mk1": "mv1",
             "mk2": [
               "lv1",
               "lv2"
             ]
           }
         }

Answer 2

You can use JSONObject and construct your data with it.

Here is the Documentation link

jsonObject.toString() // Produces json formatted object