Volley 使用 POST 方法将 JSONObject 发送到服务器 [英] Volley send JSONObject to server with POST method

问题描述

我想使用 volley 库将以下格式的 jsonobject 发送到服务器<强>{用户 ID":12，答案":{11":3，12":4，13":5}}

I want to send a jsonobject with below format to server by using volley library { "user_id": 12, "answers": { "11": 3, "12": 4, "13": 5 } }

JSONObject object = new JSONObject();

            try {
                object.put("user_id", user_id);
                JSONObject answers = new JSONObject();
               for (int i = 0; i < questions.size(); i++) {
                    JSONObject answer = new JSONObject();
                    answer.put(questions.get(i).getId(),questions.get(i).getAnswer());
                    answers.put("answers", answer);
                    object.put("answers", answer);
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }

如果我想使用 StringRequest 我应该如何使用 POST 方法将这个 JsonObject 发送到服务器

If I want to use StringRequest how should I send this JsonObject to server by using POST method

推荐答案

您可以使用以下工作示例代码.我已经测试过了.希望这会有所帮助！

You can use the following working sample code. I have tested. Hope this helps!

       try {
            jsonBody = new JSONObject();
            jsonBody.put("Title", "VolleyApp Android Demo");
            jsonBody.put("Author", "BNK");
            jsonBody.put("Date", "2015/08/26");
            requestBody = jsonBody.toString();

            StringRequest stringRequest = new StringRequest(1, url, new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    textView.setText(response);
                }
            }, new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    textView.setText(error.toString());
                }
            }) {
                @Override
                public String getBodyContentType() {
                    return String.format("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;
                    }
                }
            };
            MySingleton.getInstance(this).addToRequestQueue(stringRequest);
        } catch (JSONException e) {
            e.printStackTrace();
        }

更新:要根据您的要求创建 JSONObject，请使用以下内容:

UPDATE: To create JSONObject as your requirement, use the following:

        JSONObject jsonObject = new JSONObject();
        try {
            jsonObject.put("11", 3);
            jsonObject.put("12", 4);
            jsonObject.put("13", 5);

            JSONObject jsonObject2 = new JSONObject().put("answers", jsonObject);
            jsonObject2.put("user_id", 12);            
        } catch (JSONException e) {
            e.printStackTrace();
        }

这篇关于Volley 使用 POST 方法将 JSONObject 发送到服务器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！