如何通过asyncTask从不同的URL下载不同文件夹中的文件？

public class DownloadTask extends AsyncTask<URL, Integer, Boolean> {
    private Context context;
    private String folderPath;

    public DownloadTask(Context context, String folderPath) {
        this.context = context;
        this.folderPath = folderPath;
    }

    @Override
    protected Boolean doInBackground(URL... urls) {
        for (int i = 0; i < urls.length; i++) {
            try {
                URL url = urls[i];
                HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                connection.connect();

                int fileLength = connection.getContentLength();

                File folder = new File(folderPath);
                if (!folder.exists()) {
                    folder.mkdirs();
                }

                File file = new File(folder, "file" + i + ".txt");
                FileOutputStream outputStream = new FileOutputStream(file);

                InputStream inputStream = connection.getInputStream();

                byte[] buffer = new byte[1024];
                int len;
                int total = 0;

                while ((len = inputStream.read(buffer)) != -1) {
                    outputStream.write(buffer, 0, len);
                    total += len;
                    publishProgress((int) ((total * 100) / fileLength));
                }

                outputStream.close();
                inputStream.close();
                connection.disconnect();
            } catch (Exception e) {
                e.printStackTrace();
                return false;
            }
        }
        return true;
    }

    @Override
    protected void onProgressUpdate(Integer... values) {
        super.onProgressUpdate(values);
        // 更新下载进度
        int progress = values[0];
        // TODO: 更新UI界面的进度条
    }

    @Override
    protected void onPostExecute(Boolean result) {
        super.onPostExecute(result);
        if (result) {
            // 下载成功
            Toast.makeText(context, "下载完成", Toast.LENGTH_SHORT).show();
        } else {
            // 下载失败
            Toast.makeText(context, "下载失败", Toast.LENGTH_SHORT).show();
        }
    }
}

URL url1 = new URL("http://example.com/file1.txt");
URL url2 = new URL("http://example.com/file2.txt");

DownloadTask downloadTask = new DownloadTask(context, folderPath);
downloadTask.execute(url1, url2);