java - 在 AsyncTask 中捕获 HttpUrlConnection 的错误

Question

我正在寻找处理 HttpURLConnection 中的错误的最佳实践，特别是在主机不可用的情况下。我必须如何更改我的来源？:

    protected String doInBackground(String... strings) {
    URL aURL;
    String line;
    HttpURLConnection connection;
    BufferedReader reader;
    StringBuilder stringBuilder = null;
    try {
        aURL = new URL(strings[0]);
        connection = (HttpURLConnection) aURL.openConnection();


        InputStream aInputStream = connection.getInputStream();
        BufferedInputStream aBufferedInputStream = new BufferedInputStream(aInputStream);

        reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        stringBuilder = new StringBuilder();

        while ((line = reader.readLine()) != null)
        {
            stringBuilder.append(line);
        }

    } catch (IOException e) {
        Log.d("svc", e.toString());
    }
    return stringBuilder.toString();
}

Answer 1

使用connection.getResponseCode()你会得到不同的响应代码检查主机不可用的响应代码，您将被设置。