安卓：com.android.volley.ServerError

Question

我正在尝试将 volley request 解析为 "JsonObjectRequest" ，

我得到的错误是 "com.android.volley.ServerError" ，不知道是什么原因。

       RequestQueue queue = Volley.newRequestQueue(mConetxt);       


JsonObjectRequest putRequestUNregister = new JsonObjectRequest(Request.Method.POST, Global.un_register_device, deviceInfoUnRegister,
            new Response.Listener<JSONObject>()
            {
                @Override
                public void onResponse(JSONObject response) {
                    // response

                }
            },
            new Response.ErrorListener()
            {
                @Override
                public void onErrorResponse(VolleyError error) {
                    // error
                    hideProgress();
                    notificationInterface.NotificationReturn(false);
                    Log.e("Error.Response","notify onErrorResponse VolleyError "+ error.toString());
                    if (error instanceof TimeoutError || error instanceof NoConnectionError) {
                        Log.e("Error.Response","notify onErrorResponse VolleyError TimeoutError"+ error.toString());
                    } else if (error instanceof AuthFailureError) {
                        Log.e("Error.Response","notify onErrorResponse VolleyError AuthFailureError"+ error.toString());
                    } else if (error instanceof ServerError) {
                        Log.e("Error.Response","notify onErrorResponse VolleyError ServerError"+ error.toString());
                        //TODO
                    } else if (error instanceof NetworkError) {
                        Log.e("Error.Response","notify onErrorResponse VolleyError NetworkError"+ error.toString());
                        //TODO
                    } else if (error instanceof ParseError) {
                        Log.e("Error.Response","notify onErrorResponse VolleyError ParseError"+ error.toString());
                        //TODO
                    }
                }
            }
    ) {

        @Override
        public Map<String, String> getHeaders()
        {
            Map<String, String> headers = new HashMap<String, String>();
            headers.put("Content-Type", "application/json; charset=utf-8");
            headers.put("Accept", "application/json");

            return headers;
        }

        @Override
        public String getBodyContentType() {
            return "application/json; charset=utf-8";
        }

        @Override
        public byte[] getBody() {

            try {
                return deviceInfoUnRegister.toString().getBytes("UTF-8");
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            return null;
        }
    };

这是我试图解析的方式， 并且收到错误为“VolleyError com.android.volley.ServerError”

Answer 1

将代码替换为

 headers.put("Content-Type", "application/json; charset=utf-8");
 headers.put("Accept", "application/json");

到

headers.put("Accept","application/json");
headers.put("Content-Type","application/json");