我想发布一些参数，我在Android中使用凌空轨API。这是code：

我试着用两个日志语句，一个在 getParams（）方法，另一个在 getHeaders（）。一个在 getHeaders（）的，而另一种是没有记录的。为什么凌空忽略 getParams（）方法？

  {
// FULL_NAME，电子邮件，密码是私有变量定义为这个类

字符串URL =htt​​p://10.0.2.2:3000/users/sign_up.json;

JsonObjectRequest jsonObjReq =新JsonObjectRequest（Request.Method.POST，
                 URL，空，
                 新Response.Listener＆LT;的JSONObject＆GT;（）{

                     @覆盖
                     公共无效onResponse（JSONObject的响应）{
                         Log.d（TAG，response.toString（））;
                         pDialog.hide（）;
                     }
                 }，新Response.ErrorListener（）{

                     @覆盖
                     公共无效onErrorResponse（VolleyError错误）{
                         VolleyLog.d（TAG，错误：+ error.getMessage（））;
                         pDialog.hide（）;
                     }
                 }）{

             @覆盖
             公共地图＆LT;字符串，字符串＆GT; getParams（）方法{
                 地图＆LT;字符串，字符串＆GT; PARAMS =新的HashMap＆LT;字符串，字符串＆GT;（）;

                 //这不会出现在日志中
                 Log.d（TAG，它分配PARAMS？）;


                 params.put（姓名，full_name.getText（）的toString（））;
                 params.put（电子邮件，email.getText（）的toString（））;
                 params.put（密码，password.getText（）的toString（））;

                 返回PARAMS;
             }
             @覆盖
             公共地图＆LT;字符串，字符串＆GT; getHeaders（）抛出AuthFailureError {

                 //这出现在日志中
                 Log.d（TAG，它分配头？）;

                 HashMap的＆LT;字符串，字符串＆GT;标题=新的HashMap＆LT;字符串，字符串＆GT;（）;
                 headers.put（内容类型，应用/ JSON的;字符集= UTF-8）;

                 返回头;
             }

         };

        //添加请求，请求队列
        。VHelper.getInstance（）addToRequestQueue（jsonObjReq，tag_json_obj）;

}
 

解决方案

在地方JsonObjectRequest的使用StringRequest

  StringRequest SR =新StringRequest（Request.Method.POST，网址，新Response.Listener＆LT;字符串＆GT;（）{
        @覆盖
        公共无效onResponse（字符串响应）{
            Log.d（TAG，response.toString（））;
        }
    }，新Response.ErrorListener（）{
        @覆盖
        公共无效onErrorResponse（VolleyError错误）{
            VolleyLog.d（TAG，错误：+ error.getMessage（））;
            Log.d（TAG，+ error.getMessage（）+，+ error.toString（））;
        }
    }）{
        @覆盖
        保护地图＆LT;字符串，字符串＆GT; getParams（）方法{
            地图＆LT;字符串，字符串＆GT; PARAMS =新的HashMap＆LT;字符串，字符串＆GT;（）;
            params.put（ID，28）;
            params.put（值，1）;

            返回PARAMS;
        }

        @覆盖
        公共地图＆LT;字符串，字符串＆GT; getHeaders（）抛出AuthFailureError {
            地图＆LT;字符串，字符串＆GT;标题=新的HashMap＆LT;字符串，字符串＆GT;（）;
            headers.put（内容类型，应用程序/ x-WWW的形式urlen codeD）;
            headers.put（ABC，价值）;
            返回头;
        }
    };

        。AppController.getInstance（）addToRequestQueue（SR）;
 

I am trying to post some parameters to my rails API using Volley in Android. This is the code:

I tried with two log statements, one in getParams() and another in getHeaders(). The one in getHeaders() is logged while the other one is not. Why is volley ignoring getParams()?

{
//full_name,email,password are private variables defined for this class

String url =  "http://10.0.2.2:3000/users/sign_up.json" ; 

JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.POST,
                 url, null,
                 new Response.Listener<JSONObject>() {

                     @Override
                     public void onResponse(JSONObject response) {
                         Log.d(TAG, response.toString());
                         pDialog.hide();
                     }
                 }, new Response.ErrorListener() {

                     @Override
                     public void onErrorResponse(VolleyError error) {
                         VolleyLog.d(TAG, "Error: " + error.getMessage());
                         pDialog.hide();
                     }
                 }) {

             @Override
             public Map<String, String> getParams() {
                 Map<String, String> params = new HashMap<String, String>();

                 //This does not appear in the log
                 Log.d(TAG,"Does it assign params?") ;


                 params.put("name", full_name.getText().toString());
                 params.put("email",email.getText().toString());
                 params.put("password", password.getText().toString());

                 return params;
             }
             @Override
             public Map<String, String> getHeaders() throws AuthFailureError {

                 //This appears in the log  
                 Log.d(TAG,"Does it assign headers?") ;

                 HashMap<String, String> headers = new HashMap<String, String>();
                 headers.put("Content-Type", "application/json; charset=utf-8");

                 return headers;
             }

         };

        // Adding request to request queue
        VHelper.getInstance().addToRequestQueue(jsonObjReq, tag_json_obj);

}

Using StringRequest in place of JsonObjectRequest

StringRequest sr = new StringRequest(Request.Method.POST, url , new Response.Listener<String>() {
        @Override
        public void onResponse(String response) {
            Log.d(TAG, response.toString());
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            VolleyLog.d(TAG, "Error: " + error.getMessage());
            Log.d(TAG, ""+error.getMessage()+","+error.toString());
        }
    }){
        @Override
        protected Map<String,String> getParams(){
            Map<String, String> params = new HashMap<String, String>();
            params.put("id", "28");
            params.put("value", "1");

            return params;
        }

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

        AppController.getInstance().addToRequestQueue(sr);