我正在嘗試在Android 9，API 28中使用HttpURLConnection。它適用于Android 8.0.0，API 26，但不適用于API 28。            JSONObject jsonObject = new JSONObject();            jsonObject.accumulate("name", name);            String json = jsonObject.toString();            URL url = new URL("http://website_link");            HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();            urlConnection.setDoOutput(true);            urlConnection.setRequestMethod("POST");            urlConnection.setRequestProperty("Content-Type", "application/json; charset=UTF-8");            OutputStream os = urlConnection.getOutputStream();            os.write(json.getBytes("UTF-8"));            os.close();            InputStream inputStream = new BufferedInputStream(urlConnection.getInputStream());            BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, Charset.forName("utf-8")), 8);            String line;            json = "";            while ((line = reader.readLine()) != null) {                json += line;            }            inputStream.close();            jsonObject = new JSONObject(json);            inputStream.close();            urlConnection.disconnect();            ...我試圖使用以查看哪些代碼未執(zhí)行，我看到它停止在Log.dOutputStream os = urlConnection.getOutputStream();你知道問題出在哪里嗎？