Fetch russian shopping cheque contents by its qrcode

Cheque.java

package vd.myhome.cheque;

import android.app.Activity;
import android.content.Context;
import android.net.Uri;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.TextView;

import com.android.volley.AuthFailureError;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;

import java.util.HashMap;
import java.util.Map;

public class Cheque {

  public Cheque(
    final Context context,
    String q_t,
    String q_fn,
    String q_i,
    String q_fp,
    String q_s,
    String q_n,
    final String auth
  )
  {
    if (q_t == null || q_fn == null || q_i == null || q_fp == null || q_s == null || q_n == null) {
      return;
    }

    RequestQueue queue = Volley.newRequestQueue(context);
    // NB: This is preflight request. It's likely to return 406. Just ignore and go on.
    queue.add(new StringRequest(
      Request.Method.GET,
      String.format(
        "https://proverkacheka.nalog.ru:9999/v1/ofds/*/inns/*/fss/%s/operations/%s/tickets/%s?fiscalSign=%s&date=%s&sum=%s",
        q_fn, q_n, q_i, q_fp, q_t, q_s
      ),
      new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
//          Log.d("myhome/qrcode/cheque/1", response);
        }
      },
      new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
//          Log.e("myhome/qrcode/cheque/1", "CHECK: " + error);
        }
      }
    ));
    // Actual fetch request
    queue.add(new StringRequest(
      Request.Method.GET,
      String.format(
        "https://proverkacheka.nalog.ru:9999/v1/inns/*/kkts/*/fss/%s/tickets/%s?fiscalSign=%s&sendToEmail=no",
        q_fn, q_i, q_fp
      ),
      new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
          Log.d("myhome/qrcode/cheque/2", response);
          //---------------------------
          // NB: here we have the JSON
          TextView textView = (TextView) ((Activity) context).findViewById(R.id.cheque_content);
          textView.setText(response);
          //---------------------------
        }
      },
      new Response.ErrorListener() {
          @Override
          public void onErrorResponse(VolleyError error) {
            Log.e("myhome/qrcode/cheque/2", "FETCH: " + error);
          }
      }
    ) {
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
          Map<String, String>  params = new HashMap<String, String>();
          params.put("Device-Id", "Curl");
          params.put("Device-Os", "Linux");
          params.put("Authorization", "Basic " + auth);
          return params;
        }
    });
  }

}