在android中发送JSON请求POST答案

【问题标题】：Sending JSON request POST in android在android中发送JSON请求POST
【发布时间】：2014-10-29 22:55:55
【问题描述】：

我正在尝试将 json post 请求发送到：http://5.101.97.65:3000/en/api/sessions

发布请求结构：

{user: {email: 'value', password: 'value '} }

响应应该是这样的：

{"success":true Or False,"info":"...","data":{"auth_token":"...."}}

对于这个例子，它应该为“成功”键返回真值：

{"user":{"email":"user@example.com","password":"changeme"}}

这是我的代码：

final String myUrl ="http://5.101.97.65:3000/api/sessions";
        String result = null;
        String params = "{\"user\":{\"email\":\"user@example.com\",\"password\":\"changeme\"}}";
        try {
            restHandler rh = new restHandler();
            result = rh.getResponse(myUrl, 2, params);
            JSONObject rs = new JSONObject(result);
            if (rs.getBoolean("success"))
                return "good";
            else
                return "baad";
        }
        catch (Exception e){
            e.printStackTrace();
            return "baaad";
        }

restHandler 类（仅限 getResponse 函数）：

public String getResponse (String url, int method, String params) {
        try {
            // http client
            HttpClient httpClient = new DefaultHttpClient(new BasicHttpParams());
            HttpEntity httpEntity = null;
            HttpResponse httpResponse = null;

            // Checking http request method type
            if (method == 2) {
                HttpPost httpPost = new HttpPost(url);
                if (params != null)
                {
                    httpPost.setHeader("Content-type", "application/json");
                    httpPost.setEntity(new StringEntity(params, "UTF8"));
                }
                httpResponse = httpClient.execute(httpPost);

            } else if (method == 1) {
                // code for httpGet not needed here
            }

            httpEntity = httpResponse.getEntity();
            response = EntityUtils.toString(httpEntity);
            httpClient = null;
            httpEntity = null;
            httpResponse = null;


        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return response;
    }

我总是遇到的问题是 错误页面的 HTML 代码，甚至不是 json 响应。那么我的代码有什么问题？

【问题讨论】：

我推荐你使用这个插件：chrome.google.com/webstore/detail/advanced-rest-client/…
@Abdellah 我已经有了。对我帮助不大
你是怎么开发东西服务器端的？
不，我刚拿到这个 api，我正在处理它，curl 请求工作正常，你检查了吗？
@Abdellah 卷曲工作很好我再次尝试它工作并且我已经解决了问题检查我的新帖子我要写回复。

标签： android json rest

【解决方案1】：

问题是当我发送 Post Request 时总是以PlainText 发送所以我改变了这个：

HttpClient httpClient = new DefaultHttpClient(new BasicHttpParams());

到这里：

HttpClient httpClient = new DefaultHttpClient();

然后我添加了：

httpPost.addHeader("Accept", "application/json");

解决422 unprocessable entity在回复上的问题。

最终代码（仅限更新部分）

HttpClient httpClient = new DefaultHttpClient();
        HttpEntity httpEntity = null;
        HttpResponse httpResponse = null;

        // Checking http request method type
        if (method == POST) {
            HttpPost httpPost = new HttpPost(url);
            if (params != null)
            {
                httpPost.setHeader("Content-type", "application/json");
                httpPost.addHeader("Accept", "application/json");
                httpPost.setEntity(new StringEntity(params));

            }

【讨论】：