我知道也有类似的问题,但我已经搜索了许多问题,但这些问题似乎对我没有帮助。所以我想做的就是发送一个简单的字符串"ON"/ "OFF"作为数据的发布请求。像这样的东西(对于某些$ URL)起作用:

curl -X POST --header "Content-Type: text/plain; charset=utf-8"  -d "ON" "$URL"


这是我正在尝试的代码,在阅读了很多代码和答案后,我认为它可以正常工作,但事实并非如此。

我想念什么?我从服务器得到一个400 error

Request request = new StringRequest
                    (Request.Method.POST, url,
                            new Response.Listener<String>() {
                                @Override
                                public void onResponse(String response) {
                                    Log.d(TAG, "Command was sent successfully");
                                }},
                            new Response.ErrorListener() {
                                @Override
                                public void onErrorResponse(VolleyError error) {
                                    Log.e(TAG, "Got command error for " + url + " command " + command + " error " + error.getMessage());
                                }
                            }) {
                @Override
                public Map<String, String> getHeaders() throws AuthFailureError {
                    Map<String, String> headers = new HashMap<String, String>();
                    headers.put("Content-Type", "text/plain; charset=utf-8");
                 //   headers.put("Accept", "application/json");
                 //   headers.put("User-agent", "My useragent");
                    return headers;
                }
                @Override
                public byte[] getBody() throws AuthFailureError {
                    try {
                        return command.getBytes("utf-8");
                    } catch (Exception e) {
                        Log.d(TAG, "failed converting" + e.getMessage());
                        return null;
                    }
                }
            };

最佳答案

您必须重写getParams()

@Override
protected Map<String, String> getParams() throws com.android.volley.AuthFailureError {

    Map<String, String> params = new HashMap<String, String>();
    params.put("postData", "my simple on/off string");
    return params;

};

关于android - Volley android库发布请求不起作用,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/35408272/

10-09 01:43