如何使用Volley发布JSONObject并接收字符串? [英] How can I POST a JSONObject using Volley and receive in a String?

问题描述

我正在尝试使用Volley发布JSONObject.服务器响应很可能不是JSONObject类型.有什么想法或解决方法吗?这是我的代码:

I'm trying to post an JSONObject using Volley. Most probably, the servers response is not type JSONObject. Any ideas or workaround? This is my code:

 RequestQueue requestQueue = Volley.newRequestQueue(context);

    JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, url, jsonobject, new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {

            Build.logError("Response:" + response);

        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError volleyError) {
            Build.logError("Error: " + volleyError);


        }
    });

    requestQueue.add(jsonObjectRequest);

这是我收到的错误响应:

and this is the error response I'm receiving :

com.android.volley.ParseError: org.json.JSONException: Value OK of type java.lang.String cannot be converted to JSONObject

谢谢.

推荐答案

这是我使用String请求所做的事情.在此示例中，我在JSON对象中发布了参数.使用 http://posttestserver.com/post.php 对其进行了测试.基本上重写超类(请求类)的两个与POST相关的方法getBody()和getBodyContentType()来提供帖子数据.

Here's what I did using String request. In this example, I'm posting parameters inside JSON object. Tested it out using http://posttestserver.com/post.php. Basically override two POST related methods of the super class (Request class) getBody() and getBodyContentType() to supply post data.

RequestQueue queue = Volley.newRequestQueue(getApplicationContext());
                final JSONObject jsonObject = new JSONObject();
                jsonObject.put("fName", "First");
                jsonObject.put("lName", "Last");
                jsonObject.put("age", 11);
                jsonObject.put("ts", System.currentTimeMillis());
                StringRequest stringRequest = new StringRequest(Request.Method.POST, uri,
                        new Response.Listener<String>() {
                            @Override
                            public void onResponse(String response) {
                                System.out.println("Response from server: " + response);
                            }
                        }, new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        NetworkResponse response = error.networkResponse;
                        if (response != null) {
                            System.out.println("error code: " + response.statusCode);
                        }
                    }
                }) {
                    @Override
                    public byte[] getBody() throws AuthFailureError {
                        return jsonObject.toString().getBytes();
                    }

                    @Override
                    public String getBodyContentType() {
                        return "application/json";
                    }

                };

这篇关于如何使用Volley发布JSONObject并接收字符串?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！