如何在Android中使用volley库发布实体？

如何使用volley实现以下代码？我需要张贴和接收服务器的答复

HttpURLConnection    urlConnection = (HttpURLConnection) postUrl.openConnection();
urlConnection.setInstanceFollowRedirects(false);
// urlConnection.setHostnameVerifier(hostnameVerifier);

urlConnection.setConnectTimeout(5000);
urlConnection.setRequestMethod("POST");
urlConnection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
urlConnection.setRequestProperty("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
urlConnection.setRequestProperty("User-Agent", USER_AGENT);
urlConnection.setDoInput(true);
urlConnection.setDoOutput(true);


//Send request
OutputStreamWriter out = new OutputStreamWriter(urlConnection.getOutputStream());
out.write(data);
out.close();

//Get Response
InputStream is = urlConnection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
String line;
StringBuffer response = new StringBuffer();
while ((line = rd.readLine()) != null)
{
    response.append(line);
    response.append('\r');
}
rd.close();

ret = response.toString();

---

您可以重写请求类中的适当方法

如有要求：

Response.Listener<String> listener = new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    //consume response
                }
};

StringRequest request = new StringRequest(Request.Method.POST, url, listener, errorListener) {

        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            Map<String, String> header = new HashMap<>();
            header.put("User-Agent", USER_AGENT);
            header.put("Content-Type", "application/x-www-form-urlencoded");
            ...
            return header;
        }

        @Override
        public byte[] getBody() throws AuthFailureError {
            String someContent = "{\"key\"=\"\value\"}";
            return someContent.getBytes();
        }
};

---

创建

请求

并覆盖

getParams（）

，或

getBody（）

？有很多例子说明了如何做到这一点，那么你到底在哪一步上遇到了问题？到目前为止你都做了些什么？请阅读这篇涵盖GET和POST请求的优秀教程。非常感谢。我无法将字符串数据发布到服务器。上帝保佑你。

RequestQueue queue = Volley.newRequestQueue(context);
queue.add(request);