Question

我使用post man测试url（post），看起来很好。 API：update frame in matplotlib with live camera preview

但是当我在我的机器人上尝试它时，即使我的响应代码是200，也无法得到消息

我的logcat显示{"Msg":"Request method not accepted","JsonData":null,"ErrorCode":"0099"}

我不明白，我之前使用代码来获取json数据。

有人可以告诉我我错过了哪一步，我将不胜感激。

这是我的get json数据函数：

private String getRoute(String url) throws IOException {
        HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
        int responseCode = connection.getResponseCode();
        StringBuilder jsonIn = new StringBuilder();
        // responseCode show 200
        Log.d("responseCode:",responseCode+"");
        if (responseCode == 200) {
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                jsonIn.append(line);
            }
        } else {
            Log.d(TAG, responseCode + "responseCode");
        }
        connection.disconnect();
        // I can't get the json data it shows Request method not accepted
        Log.d(TAG, jsonIn + "jsonIn");
        return jsonIn.toString();

    }

Answer 1

默认情况下，HttpURLConnection正在发送GET请求您的链接运行正常。
尝试添加
$file = $_FILES["img"]["name"];

Reference

Answer 2

服务器本身的响应为JsonData为null，您应该在服务器端检查。

Answer 3

您好，您的链接正在运行发布请求

private String getRoute(String url) throws IOException {
        HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
        int responseCode = connection.getResponseCode();
        connection.setRequestMethod("POST");


        StringBuilder jsonIn = new StringBuilder();
        // responseCode show 200
        Log.d("responseCode:",responseCode+"");
        if (responseCode == 200) {
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String line;
            while ((line = bufferedReader.readLine()) != null) {
                jsonIn.append(line);
            }
        } else {
            Log.d(TAG, responseCode + "responseCode");
        }
        connection.disconnect();
        // I can't get the json data it shows Request method not accepted
        Log.d(TAG, jsonIn + "jsonIn");
        return jsonIn.toString();

    }

我希望它会起作用但在我看来你应该使用Volley或Retrofit而不是HttpURLConnection

为什么我无法获取json数据？

3 个答案: