如何使用带有字符串正文的 volley 发送 POST 请求?

问题描述：

我正在开发一个 Android 应用程序，该应用程序与我编写的 RESTful Web 服务进行通信.将 Volley 用于 GET 方法非常棒且简单，但我无法将手指放在 POST 方法上.

I'm developing an Android app that communicate with a RESTful web service I wrote. Using Volley for GET methods is awesome and easy, but I can't put my finger on the POST methods.

我想在请求正文中发送一个带有 String 的 POST 请求，并检索 Web 服务的原始响应(例如 200 ok, 500 服务器错误).

I want to send a POST request with a String in the body of the request, and retrieve the raw response of the web service (like 200 ok, 500 server error).

我能找到的只是StringRequest，它不允许发送数据(正文)，而且它限制我接收解析的String 响应.我还遇到了 JsonObjectRequest 它接受数据(正文)但检索解析的 JSONObject 响应.

All I could find is the StringRequest which doesn't allow to send with data (body), and also it bounds me to receive a parsed String response. I also came across JsonObjectRequest which accepts data (body) but retrieve a parsed JSONObject response.

我决定编写自己的实现，但找不到从 Web 服务接收原始响应的方法.我该怎么做?

I decided to write my own implementation, but I cannot find a way to receive the raw response from the web service. How can I do it?

答

可以参考以下代码(当然你可以自定义获取更多网络响应的细节):

You can refer to the following code (of course you can customize to get more details of the network response):

try {
    RequestQueue requestQueue = Volley.newRequestQueue(this);
    String URL = "http://...";
    JSONObject jsonBody = new JSONObject();
    jsonBody.put("Title", "Android Volley Demo");
    jsonBody.put("Author", "BNK");
    final String requestBody = jsonBody.toString();

    StringRequest stringRequest = new StringRequest(Request.Method.POST, URL, new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            Log.i("VOLLEY", response);
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Log.e("VOLLEY", error.toString());
        }
    }) {
        @Override
        public String getBodyContentType() {
            return "application/json; charset=utf-8";
        }

        @Override
        public byte[] getBody() throws AuthFailureError {
            try {
                return requestBody == null ? null : requestBody.getBytes("utf-8");
            } catch (UnsupportedEncodingException uee) {
                VolleyLog.wtf("Unsupported Encoding while trying to get the bytes of %s using %s", requestBody, "utf-8");
                return null;
            }
        }

        @Override
        protected Response<String> parseNetworkResponse(NetworkResponse response) {
            String responseString = "";
            if (response != null) {
                responseString = String.valueOf(response.statusCode);
                // can get more details such as response.headers
            }
            return Response.success(responseString, HttpHeaderParser.parseCacheHeaders(response));
        }
    };

    requestQueue.add(stringRequest);
} catch (JSONException e) {
    e.printStackTrace();
}

如何使用带有字符串正文的 volley 发送 POST 请求?

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