Get JSON Data from URL Using Android?

I am trying to get JSON data by parsing login url with username and password. I have tried by using below code but I can't get any responses. Please help me.

I am using HTTP Process and API level 23.

I need to parse my URL and get below Response

{
    "response":{
                "Team":"A",
                "Name":"Sonu",
                "Class":"First",
              },
                "Result":"Good",
}

Below My code :

public class LoginActivity extends Activity {

    JSONParser jsonparser = new JSONParser();
    TextView tv;
    String ab;
    JSONObject jobj = null;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login);

        new retrievedata().execute();

    }

    class retrievedata extends AsyncTask<String, String, String>{

        @Override
        protected String doInBackground(String... arg0) {
            // TODO Auto-generated method stub
            jobj = jsonparser.makeHttpRequest("http://myurlhere.com");

            // check your log for json response
            Log.d("Login attempt", jobj.toString());

            try {
                ab = jobj.getString("title");
            } catch (JSONException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            return ab;
        }
        protected void onPostExecute(String ab){

            tv.setText(ab);
        }

    }

}