Volley BasicNetwork.performRequest: Unexpected res

问题:

I get always this 401 error with this code to accept normal authentication. I have add also the file network_security_config.xml to bypass some other info message:

String http_post() {
RequestQueue MyRequestQueue = Volley.newRequestQueue(Library.this);

//String url = "http://" + "hqplayer" + ":" + Utils.password + "@" + Utils.ip + ":8088/library";
String url = "http://" + Utils.ip + ":8088/library";

Log.i(TAG, "HttpPost() <" + url + ">");

MyRequestQueue.add(new StringRequest(Request.Method.POST, url,

   new response.Listener<String>() {
   @Override
   public void onResponse(String response) {
       Log.i(TAG, "HttpPost() - onResponse() ");
   }},

   new Response.ErrorListener() {
   @Override
   public void onErrorResponse(VolleyError error) {
       Log.i(TAG, "HttpPost() - onErrorResponse() ");
       Log.i(TAG, "HttpPost() error <" + error + ">");
   }}) {

       @Override
       public Map<String, String> getHeaders() throws AuthFailureError {
          HashMap<String, String> params = new HashMap<String, String>();
          String creds = String.format("%s:%s","hqplayer","valvole");
          String auth = "Basic " + Base64.encodeToString(creds.getBytes(), Base64.DEFAULT);
          params.put("Authorization", auth);
          return params;
     }});
     return null;
}