android - How to get an specific element in JSON?

Question

If I have a JSON like below:

{
  "Division": [
      {
        "DivisionId": 1,
        "DivisionName" : "A"
      },
      {
        "DivisionId": 2,
        "DivisionName" : "B"
      }
  ],
 "Title": [
     {
       "TitleId": 11,
       "Title": "Title 1"
     },
     {
       "TitleId": 12,
       "Title": "Title 2"
     }
  ]
}

How can I get the Division only with its values inside? What I'm trying to achieve is to put the values of Division inside my ArrayList. I'm using Volley to get the JSON result and what I tried is on the onResponse I used JSONArray divisionArr = response.getJSONArray("Division"); and loop it here's my code

 JSONArray divisionArr = response.getJSONArray("Division");

                for (int i = 0; i < divisionArr.length(); i++) {
                    Division division = new Division();
                    JSONObject divisionObj = (JSONObject) divisionArr.get(i);

                    division.setId(divisionObj.getInt("DivisionId"));
                    division.setName(divisionObj.getString("DivisionName"));

                    divisionArrayList.add(division);
                }

But I'm having an error ParseError, I maybe doing it wrong, but I don't know what is it. Please help, thank you.

/////// Here's my Volley request

public void getData(Response.Listener<JSONObject> listener, Response.ErrorListener errorListener) {

    try{

        String syncCall = Constants.VOLLEY;

        request = new JsonObjectRequest(Method.GET,
                syncCall,
                null,
                listener,
                errorListener);

        request.setRetryPolicy(
                new DefaultRetryPolicy(
                        60000,//DefaultRetryPolicy.DEFAULT_TIMEOUT_MS, // 2500
                        1,//DefaultRetryPolicy.DEFAULT_MAX_RETRIES, // 1
                        DefaultRetryPolicy.DEFAULT_BACKOFF_MULT)); //1f

        mRequestQueue.add(request);
    } catch (Exception e) {
        e.printStackTrace();
    }
} 

Then in my Activity

  private void callSyncVolley() {

    final ProgressDialog pd = new ProgressDialog(this);
    pd.setMessage("Fetching data....");
    pd.show();

    Response.Listener<JSONObject> listener = new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {
            try {
                JSONArray divisionArr = response.getJSONArray("Division");

                for (int i = 0; i < divisionArr.length(); i++) {
                    Division division = new Division();
                    JSONObject divisionObj = (JSONObject) divisionArr.get(i);

                    division.setId(divisionObj.getInt("DivisionId"));
                    division.setName(divisionObj.getString("DivisionName"));

                    divisionArrayList.add(division);
                }

                pd.dismiss();

            } catch (JSONException e) {
                e.printStackTrace();
                Log.e(TAG, "Error: " + e.getMessage());
                pd.dismiss();
            }
        }
    };

    Response.ErrorListener errorListener = new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

            if (error.networkResponse != null) {
                Log.d(TAG, "Error Response code: " + error.networkResponse.statusCode);
                pd.dismiss();
            }
            if (error instanceof TimeoutError || error instanceof NoConnectionError) {
                Log.d(TAG, "Error Response code: Timeout/NoConnection");
                pd.dismiss();
            } else if (error instanceof AuthFailureError) {
                //TODO
                Log.d(TAG, "Error Response code: AuthFailureError");
                pd.dismiss();
            } else if (error instanceof ServerError) {
                //TODO
                Log.d(TAG, "Error Response code: ServerError");
                pd.dismiss();
            } else if (error instanceof NetworkError) {
                //TODO
                Log.d(TAG, "Error Response code: NetworkError");
                pd.dismiss();
            } else if (error instanceof ParseError) {
                //TODO
                Log.d(TAG, "Error Response code: ParseError");
                pd.dismiss();
            }
        }
    };

    VolleyRequestManager.getInstance().doRequest().getData(listener, errorListener);
}

The error only shows Error Response code: ParseError

Answer 1

Your JSON format is invalid,

{
  "Division": [
      {
        "DivisionId": 1,
        "DivisionName" : A
      },
      {
        "DivisionId": 2,
        "DivisionName" : B
      }
  ],
 "Title": [
     {
       "TitleId": 11,
       "Title": "Title 1"
     },
     {
       "TitleId": 12,
       "Title": "Title 2"
     }
  ],
}

I just pasted your format here

1. divisionArr.setName(divisionObj.getString("DivisionName")); &&

You are trying to access a String which is not wrapped in double quotes,the String A and String B is not wrapped in double quotes.

2. Unnecessary comma at the end of the array ],