Getting JSONObject from JSONArray [duplicate]

Question

I am in a bit of a fix regarding the JSONObject that I am getting as a response from the server.

jsonObj = new JSONObject(resultString);
            JSONObject sync_reponse = jsonObj.getJSONObject("syncresponse");
            String synckey_string = sync_reponse.getString("synckey");
            JSONArray createdtrs_array = sync_reponse.getJSONArray("createdtrs");
            JSONArray modtrs_array = sync_reponse.getJSONArray("modtrs");
            JSONArray deletedtrs_array = sync_reponse.getJSONArray("deletedtrs");
            String deleted_string = deletedtrs_array.toString();

{"syncresponse":{"synckey":"2011-09-30 14:52:00","createdtrs":[],"modtrs":[],"deletedtrs":[{"companyid":"UTB17","username":"DA","date":"2011-09-26","reportid":"31341"}]

as you can see in the response that I am getting I am parsing the JSONObject and creating syncresponse, synckey as a JSON object createdtrs, modtrs, deletedtrs as a JSONArray. I want to access the JSONObject from deletedtrs, so that I can split them apart and use the values. i.e I want to extract companyid, username, date etc.

How can I go about this ?

Thanks for your input.

Answer 1

JSONArray objects have a function getJSONObject(int index), you can loop through all of the JSONObjects by writing a simple for-loop:

JSONArray array;
for(int n = 0; n < array.length(); n++)
{
    JSONObject object = array.getJSONObject(n);
    // do some stuff....
}

Answer 2

Here is your json:

{
    "syncresponse": {
       "synckey": "2011-09-30 14:52:00",
        "createdtrs": [

        ],
        "modtrs": [

        ],
        "deletedtrs": [
          {
           "companyid": "UTB17",
           "username": "DA",
           "date": "2011-09-26",
           "reportid": "31341"
      }
       ]
   }
}

and it's parsing:

JSONObject object = new JSONObject(result);
String syncresponse = object.getString("syncresponse");
JSONObject object2 = new JSONObject(syncresponse);
String synckey = object2.getString("synckey");
JSONArray jArray1 = object2.getJSONArray("createdtrs");
JSONArray jArray2 = object2.getJSONArray("modtrs");
JSONArray jArray3 = object2.getJSONArray("deletedtrs");
for(int i = 0; i < jArray3 .length(); i++)
{
   JSONObject object3 = jArray3.getJSONObject(i);
   String comp_id = object3.getString("companyid");
   String username = object3.getString("username");
   String date = object3.getString("date");
   String report_id = object3.getString("reportid");
}

Answer 3

JSONArray deletedtrs_array = sync_reponse.getJSONArray("deletedtrs");

for(int i = 0; deletedtrs_array.length(); i++){

            JSONObject myObj = deletedtrs_array.getJSONObject(i);
}