如何使用Volley将JSON对象发送到服务器

Question

我从服务器上使用Volley Library获取JSON数据，但现在需要将JSON发送到服务器。但我不知道如何发回JSONArray或JSONObject。

我用下一个例子检索数据。

JsonArrayRequest program_from_event = new JsonArrayRequest(URL, new Response.Listener<JSONArray>() { 

    @Override 
    public void onResponse(JSONArray response) { 

     if(response.length() > 0){ 
      for(int i = 0; i < response.length(); i++){ 
       try { 
        JSONObject input = response.getJSONObject(i); 
        String name = input.getString("name"); 
        String work_area = input.getString("work_area"); 
        String email = input.getString("email"); 
        String phone = input.getString("phone"); 
        String avatar = input.getString("avatar"); 
        String description = input.getString("description"); 
        int id = input.getInt("id"); 

        ... 

       } catch (JSONException e) { 
        e.printStackTrace(); 
       } 
      } 
     } 
    } 

}, new Response.ErrorListener(){ 

    @Override 
    public void onErrorResponse(VolleyError error) { 
     NetworkResponse nr = error.networkResponse; 
     if(nr != null && nr.statusCode == HttpStatus.SC_UNAUTHORIZED){ 
      Log.i("ERROR", "ERROR"); 
     } 
    } 
}); 

volley_queue.add(program_from_event); 

}

我该怎么办send方法？谢谢。

Answer 1

protected void callWebService(final User user) { 
     pd = ProgressDialog.show(activity, "Please Wait...", "Please Wait..."); 
     RequestQueue queue = Volley.newRequestQueue(activity); 
     JsonObjectRequest jsObjRequest = new JsonObjectRequest(
       Request.Method.POST,url, 
       createUserMapperObejct(user), 
       new Response.Listener<JSONObject>() { 
        @Override 
        public void onResponse(JSONObject response) { 
         pd.dismiss(); 
         Log.v("reponse", "" + response); 


         } catch (JSONException e) { 
          e.printStackTrace(); 
         } 
        } 
       }, new Response.ErrorListener() { 

        @Override 
        public void onErrorResponse(VolleyError error) { 
        } 
       }); 
     queue.add(jsObjRequest); 
    } 

public static JSONObject createUserMapperObejct(User user) 
    { 
     JSONObject request=new JSONObject(); 
     try { 
      request.put(StringConstant.USERNAME, user.getUserName()); 
      request.put(StringConstant.PASSWORD, user.getPassword()); 
      request.put(StringConstant.CONFIRMPASSWORD, user.getPassword()); 
      request.put(StringConstant.EMAILID, user.getEmailId()); 
      request.put(StringConstant.CONTACTNO, user.getMobileNo()); 
     } catch (JSONException e) { 
      e.printStackTrace(); 
     } 
     return request; 
    }