I work with volley and get the error:

java.net.ProtocolException: Too many follow-up requests: 21

here is my code:

@Override protected void onCreate(Bundle savedInstance){ CookieManager cookieManager = new CookieManager(); CookieHandler.setDefault(cookieManager); super.onCreate(savedInstance); setContentView(R.layout.activity_main); Button btnGet = (Button) findViewById(R.id.btnGet); btnGet.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { sendRequestAndPrintResponse(); } }); } private void sendRequestAndPrintResponse() { RequestQueue nRequestQueue = Volley.newRequestQueue(this); String url = "http://serverapi.respect-shoes.kz/ServerAPI/hs/Konversia"; StringRequest stringRequest = new StringRequest(Request.Method.GET, url, new Response.Listener<String>() { @Override public void onResponse(String response) { Log.i(TAG, response); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.i(TAG, "Error : " + error.toString()); } }); nRequestQueue.add(stringRequest); Authenticator.setDefault(new Authenticator() { protected PasswordAuthentication getPasswordAuthentication() { String username =""; String password =""; return new PasswordAuthentication(username, password.toCharArray()); } }); }

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