在使用getHeader和getParams时凌空发布JsonObjectRequest忽略参数

Question

我正在尝试连接API url=“API address”，它接受两种头类型application/json到json中的reponce和application/xml到xml中的reponce。我需要用JSON参数点击JSON，response也将是JSON格式。使用android volley Post请求和JsonObjectRequest设置头，使用getHeaders连接到服务器，但使用getParams设置参数不起作用。

RequestQueue queue = Volley.newRequestQueue(this);
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.POST,
            Constants.BASE_URL + Constants.LOGIN, null, response,
            response_error) {
        /**
         * Passing some request headers
         * */
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            HashMap<String, String> headers = new HashMap<String, String>();
            headers.put("Content-Type", "application/json");
            return headers;
        }
         @Override
         protected Map<String, String> getPostParams()
         throws AuthFailureError {
         // TODO Auto-generated method stub
            Map<String, String> params = new HashMap<String, String>();
            params.put("key", "value");
            return params;
         }
    };
    // implementation of listeners
    Response.Listener<JSONObject> response = new Response.Listener<JSONObject>() {

        @Override
        public void onResponse(JSONObject response) {
            Log.d(TAG, response.toString());
            Log.e("responce", response.toString());

            // msgResponse.setText(response.toString());
            hideProgressDialog();
        }
    };
    Response.ErrorListener response_error = new Response.ErrorListener() {

        @Override
        public void onErrorResponse(VolleyError error) {
            Log.e("error responce", error.getMessage());
            VolleyLog.d(TAG, "Error: " + error.getMessage());
            hideProgressDialog();
        }
    };
//get params never get called
//i also tried alternative to send params but does not works.
        Map<String, String> params = new HashMap<String, String>();
            params.put("key", "value");
        JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.POST,
            Constants.BASE_URL + Constants.LOGIN, new JSONObject(params), response,
            response_error) {
        /**
         * Passing some request headers
         * */
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            HashMap<String, String> headers = new HashMap<String, String>();
            headers.put("Content-Type", "application/json");
            return headers;
        }
};

    any type of help will be appretiated, Thanks in advance.

Answer 1

截击JsonObjectRequest Post请求不工作

从这篇文章开始的另一个答案来看：您可以创建一个定制的JSONObjectReuqest

Answer 2

Volley会忽略你的Content-Type设置，如果要修改Content-type，可以重写getBodyContentType方法：

JsonObjectRequest jsonObjReq = new JsonObjectRequest(Method.POST, url,
        new JSONObject(params), response, response_error) {
    @Override
    public String getBodyContentType() {
        return "application/json; charset=utf-8";
    }
}

为什么截击忽略了你的参数？看看我的另一个答案。