java - Volley Post 请求在 onResponse 内未返回任何响应

Question

所以我想打印响应的结果，然后使用 gson 为模型生成数据，但响应永远不会返回，但 onResponse 被调用。!

如果你注意到 Logcat，onResponse 中的 log.i 没有显示..!？但在使用此请求的 Activity 的 onSuccess 内部，它正常显示日志，但如果日志包含响应对象，它不会显示，这非常奇怪并且没有任何意义..!？

日志猫

I/getUrl:: http://1925.232.55/login.php
I/getParams:: {username =samy, password=123456}
D/libc: [NET] android_getaddrinfofornetcontext+,hn 20(0x6),sn(),hints(known),family 0,flags 1024, proc=com...
D/libc: [NET] android_getaddrinfo_proxy get netid:0
D/libc: [NET] android_getaddrinfo_proxy-, success
I/onSuccess:: check /* this log inside the Activity which uses this request */

I tried test the request using PostMan with the same url and params and it returns json response normally..?

postman 回复

{
    "status": "success",
    "user_id": "10",
    "user_name": "samy",
    "full_name": "samy samy",
    "picture": "st_pictures/IMG_085207.jpg",
    "level": "1",
    "school": "NY School",
    "city": "NY",
    "class": "6",
    "age": "22",
    "teacher": "2",
    "token": "f808e758sdfsdfsf162dbdfcf88e3dc8a96"
}

请求代码

 final RequestQueue queue = Volley.newRequestQueue(context);

      final StringRequest sr = new StringRequest(Request.Method.POST, getLoginURL(), new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
          Log.i("onResponse: ", response + "");
      requestResult.onSuccess(response);


      }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
      requestResult.onFail(error);

           VolleyLog.e("Error: ", error.getMessage());
          error.printStackTrace();
        }
      })
      {
        @Override
        protected Map<String, String> getParams() {
          Map<String, String> params = new HashMap<String, String>();
          params.put("username ", un);
          params.put("password", pass);
          Log.i( "getParams: ", params.toString());
          return params;
        }

        @Override
        public byte[] getBody() throws AuthFailureError {
          Log.i( "getUrl: ",getUrl());
          return super.getBody();

        }
      }
      ;

      queue.add(sr);

更新#1

网址http://clients.intertech.ps/raz/std.php

 E/Volley: [1] 2.onErrorResponse: Error: 
 W/System.err: com.android.volley.ParseError: org.json.JSONException: End of input at character 0 of 
 W/System.err:     at com.android.volley.toolbox.JsonObjectRequest.parseNetworkResponse(JsonObjectRequest.java:73)
 W/System.err:     at com.android.volley.NetworkDispatcher.run(NetworkDispatcher.java:123)
 W/System.err: Caused by: org.json.JSONException: End of input at character 0 of 
 W/System.err:     at org.json.JSONTokener.syntaxError(JSONTokener.java:449)
 W/System.err:     at org.json.JSONTokener.nextValue(JSONTokener.java:97)
 W/System.err:     at org.json.JSONObject.<init>(JSONObject.java:156)
 W/System.err:     at org.json.JSONObject.<init>(JSONObject.java:173)
W/System.err:     at com.android.volley.toolbox.JsonObjectRequest.parseNetworkResponse(JsonObjectRequest.java:68)
 W/System.err:  ... 1 more

Answer 1

这个问题很久以前就被问到了，但我也遇到了同样的问题，几个小时后我让它与 Volley 一起工作

使用StringRequest而不是JsonObjectRequest，出于某种原因我在JOR上遇到了很多问题，并且我使用了@Oussema Aroua的getHeaders函数

final Response.Listener<String> responseListener = new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            Log.d("RESPONSE", String.valueOf(response));
        }
    };

final Response.ErrorListener errorListener = new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

            //Handle your errors
        }
    };

StringRequest request = new StringRequest(Request.Method.POST, url,
            responseListener, errorListener) {
        @Override
        protected Map<String, String> getParams() {
            Map<String, String> params = new HashMap<>();
            //Put your params for post
            return params;
        }

        @Override
        public Map<String, String> getHeaders() {
            Map<String,String> params = new HashMap<>();
            params.put("Content-Type","application/x-www-form-urlencoded"); //-> this is the key
            return params;
        }
    };

.. 您将在 onResponse

中从服务器获取 json 响应