Volley Post网络请求

/*post请求*/public void dostringVolleypost(){    /*第一步，建立请求队列*/    queue = Volley.newRequestQueue(this);    /*第二步，建立请求对象*/    StringRequest stringRequest = new StringRequest(            Request.Method.POST,           //当改为post方法时：Request.Method.POST            "http://apis.baidu.com/txapi/tiyu/tiyu?num=10",            new Response.Listener<String>() {                @Override                public void onResponse(String response) {                    String s = response;                    webView.getSettings().setJavaScriptEnabled(true);                    webView.getSettings().setDefaultTextEncodingName("UTF-8");                    webView.loadDataWithBaseURL(null,s,"text/html","UTF-8",null);                }            },            new Response.ErrorListener() {                @Override                public void onErrorResponse(VolleyError error) {                    webView.loadDataWithBaseURL(null,"网络请求失败","text/html","UTF-8",null);                }            }    ){   //经过匿名内部类的方式实现post方法存储参数，其它的与get方法相同        @Override        protected Map<String, String> getParams() throws AuthFailureError {            Map<String,String> map = new HashMap<String, String>();            map.put("name","ZhangSan");            map.put("pwd","123456");            return map;        }        /*getHeaders匿名内部类，获取头部，即获取apikey，对get方法和post方法都适用*/        @Override        public Map<String, String> getHeaders() throws AuthFailureError {            Map<String,String> map = new HashMap<String, String>();            map.put("apikey","96c52acc3831b95cf4a5c6f0e23ea209");            return map;        }        /*重写方法，完成转码*/        @Override        protected Response<String> parseNetworkResponse(                NetworkResponse response) {            try {                String jsonObject = new String(new String(response.data, "UTF-8"));                return Response.success(jsonObject, HttpHeaderParser.parseCacheHeaders(response));            } catch (UnsupportedEncodingException e) {                return Response.error(new ParseError(e));            } catch (Exception je) {                return Response.error(new ParseError(je));            }        }        /*设置当前请求的优先级*/        @Override        public Priority getPriority() {            return Priority.HIGH;        }    };    stringRequest.setTag("post");    /*第三步，把请求对象放在请求队列*/    queue.add(stringRequest);}@Overrideprotected void onStop() {    super.onStop();    queue.cancelAll("get");/*取消当前队列里的Tag为get的请求*/    queue.cancelAll(this);/*取消当前队列里的全部网络请求*/}