Get data from sqlite and POST to server

i have data in table named table_selected with fields(_ItemID, _ItemName, _CategoryID) in sqlite i want to get data from sqlite and Post to server in json format any help.....i am using AsyncTask to post data

this is how i am getting data from sqlite

 public ArrayList<String> getAllSelectedToPost() {
    SQLiteDatabase db = this.getReadableDatabase();
    ArrayList<String> selectedList = new ArrayList<>();
    try {
        String query = "SELECT * FROM " + TABLE_SELECTED;
        Cursor c = db.rawQuery(query, null);
        JSONObject obj;
        JSONArray arr = new JSONArray();
        c.moveToFirst();
        while (c.moveToNext()) {
            obj = new JSONObject();
            obj.put("ItemID", c.getString(0));
            obj.put("ItemName", c.getString(1));
            obj.put("CategoryID", c.getString(2));
            arr.put(obj);
        }
        obj = new JSONObject();
        obj.put("Selected",arr);
        selectedList = new ArrayList<>();
        selectedList.add(obj.toString());
    }catch (Exception e){
        e.printStackTrace();
    }
    return selectedList;
}

this is how i am posting data to server using AsyncTask.. i am doing this in OnCreate

 handler = new DBSQLite(this);
    postSelected = new ArrayList<>();
    postSelected = handler.getAllSelectedToPost();
    String resultserver = url + postSelected;
    Post_Selected runner = new Post_Selected();
    runner.execute(resultserver);

 public class Post_Selected extends AsyncTask<String, Void, Integer>{

    @Override
    protected Integer doInBackground(String... params) {

        HttpURLConnection urlConnection = null;

        Integer result = 0;
        try{
            URL url = new URL(params[0]);
            urlConnection = (HttpURLConnection) url.openConnection();
            urlConnection.setRequestProperty("Content-Type", "application/json");
            urlConnection.setRequestProperty("Accept", "application/json");
            urlConnection.setRequestMethod("POST");
            //  urlConnection.setDoInput(true);
            urlConnection.setDoOutput(true);
            urlConnection.connect();
            int statusCode = urlConnection.getResponseCode();

            if (statusCode == 200){
                result = 1;
            }else{
                result = 0;
            }

        }catch (IOException e){
            e.printStackTrace();
        }catch (Exception e){
            e.printStackTrace();
        }
        return result;
    }

    @Override
    protected void onPostExecute(Integer integer) {
        super.onPostExecute(integer);
    }
}

is this the right way i am doing.....