AsyncTask for GET request and parse on a custom adapter

gistfile1.java

    private class CallAPI extends AsyncTask<String, String, JSONArray> {

        JSONArray jArray;
        @Override
        protected JSONArray doInBackground(String... urls) {

            try {
                URL url = new URL(getString(R.string.api_url));
                HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
                httpCon.setRequestMethod("GET");
                if(httpCon.getResponseCode() == 200) {
                    BufferedReader br = new BufferedReader(new InputStreamReader(httpCon.getInputStream()));
                    StringBuilder sb = new StringBuilder();
                    String line;
                    while ((line = br.readLine()) != null) {
                        sb.append(line).append("\n");
                    }
                    br.close();

                    jArray = new JSONArray(sb.toString());
                    return jArray;
                }
                else {
                    Log.d("ERR REQEST","Bad  Response code" );
                }

            } catch (IOException e) {
                e.printStackTrace();
            } catch (JSONException e) {
                e.printStackTrace();
            }

            return null;

        }
        
        protected void onPostExecute(JSONArray result) {
            ArrayList<Kid> kids = new ArrayList<Kid>();

            for (int i = 0; i < jArray.length(); i++) {
                try {
                    JSONObject jobj = jArray.getJSONObject(i);
                    String id = jobj.getString("id");
                    String name = jobj.getString("name");
                    String stop = jobj.getString("stop");

                    Kid kid = new Kid(id,name,stop);
                    kids.add(kid);
                } catch (JSONException e) {
                    e.printStackTrace();
                }

            }

            KidAdapter kidAdapter = new KidAdapter(getActivity(),kids);
            // Set the adapter
            mListView = (AbsListView)  getActivity().findViewById(android.R.id.list);
            mListView.setAdapter(kidAdapter);

        }
    }