ลิ้ง JSON จาก URL ไม่อ่านค่าออกมาเป็น Array แบบ1 มิติครับ แก้Code ตรงไหนแนะนำที่ครับ

ArrayList<HashMap<String, String>> contactList;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        contactList = new ArrayList<>();

        lv = (ListView)findViewById(R.id.listView);

        new GetContacts().execute();
    }

    private  class  GetContacts extends AsyncTask<Void, Void, Void>{

        @Override
        protected void onPreExecute() {
            super.onPreExecute();

            //show loading dialog
            pDialog = new ProgressDialog(MainActivity.this);
            pDialog.setMessage("Loading...");
            pDialog.setCancelable(false);
            pDialog.show();
        }

        @Override
        protected Void doInBackground(Void... voids) {
            HttpHandler sh = new HttpHandler();


            String jsonSTr = sh.makeServiceCall(url);

            Log.e(TAG, "Response from url:" +jsonSTr);

            if (jsonSTr != null){
                try {
                    JSONObject jsonObject = new JSONObject(jsonSTr);

                    JSONArray contacts = jsonObject.getJSONArray("1");

                    for (int i = 0; i<contacts.length(); i++){
                    JSONObject c = contacts.getJSONObject(i);

                        String pr_id = c.getString("pr_id");

                    //String id = c.getString("id");
                    //String name = c.getString("name");
                    //String email = c.getString("email");
                    //String address = c.getString("address");
                    //String gender = c.getString("gender");


                    //JSONObject phone = c.getJSONObject("phone");
                    //String mobile = phone.getString("mobile");
                    //String home = phone.getString("home");
                    //String office = phone.getString("office");


                    HashMap<String, String> contact = new HashMap<>();

                        contact.put("pr_id", pr_id);
                    contactList.add(contact);
                    }

                }catch (final JSONException e){
                    Log.e(TAG, "JSON parsing error:" +e.getMessage());
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            Toast.makeText(MainActivity.this,
                                    "JSON parsing error:" +e.getMessage(),
                                    Toast.LENGTH_LONG).show();
                        }
                    });
                }
            } else {
                Log.e(TAG, "Couldn't get json from server.");
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(MainActivity.this,
                                "Couldn't get json from server.",
                                Toast.LENGTH_SHORT).show();
                    }
                });
            }

            return null;
        }

        @Override
        protected void onPostExecute(Void aVoid) {
            super.onPostExecute(aVoid);
            if (pDialog.isShowing()){
                pDialog.dismiss();
            }
            ListAdapter adapter = new SimpleAdapter(
                    MainActivity.this,contactList,
                    R.layout.list_item, new String[]{"pr_id", "email", "mobile"},
                    new int[] {R.id.name, R.id.email, R.id.mobile});

            lv.setAdapter(adapter);
        }
    }
}