使用Android Volley调用Python服务器。为什么会运行两次？

Question

我遇到一个问题。 我使用Android Volley调用Python服务器，但它将调用两次。如何让它只运行一次？

症状：它将两次调用callphone.py文件。

Android代码：

url = http://xxx.xxx.xxx.xxx:8080/callphone.py

public static ArrayList<Bot> bots = new ArrayList<Bot>();

python服务器代码：

private void request_z(String url) {
    final RequestQueue requestQueue = Volley.newRequestQueue(this);
    final StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
            new Response.Listener<String>(){
                @Override
                public void onResponse(String response) {

                    //textView.setText("Response is: " + response.substring(0, 500));
                    requestQueue.stop();
                }
            }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            textView.setText("That didn't work!");
            requestQueue.stop();
        }
    });
    requestQueue.add(stringRequest);

服务器日志 Microsoft Windows [版本6.1.7601] 版权所有（c）2009 Microsoft Corporation。保留所有权利。

import BaseHTTPServer
import CGIHTTPServer
import cgitb; cgitb.enable()


server = BaseHTTPServer.HTTPServer
handler = CGIHTTPServer.CGIHTTPRequestHandler
server_address = ("", 8080)
handler.cgi_directories = ["/"]

httpd = server(server_address, handler)
httpd.serve_forever()