ByteArrayOutputStream超时

Question

我正在将mp3文件下载到SD卡。有时，当网络连接不良或互联网不可用时，ByteArrayOutputStream写入功能会继续运行，即使互联网可用，下载也不会恢复。我想在互联网丢失时抛出超时异常，但OutputStream本身不提供超时机制。如何在互联网不可用时停止写字节。 以下是我正在使用的代码 -

try {
    URL url = new URL(downloadSongsList.get(count1).getTitle_Url());
    URLConnection conection = url.openConnection();
    conection.setRequestProperty("Range", "byte  BHs=" + total + "-");
    conection.connect();
    //TODO: getting file length
    int lenghtOfFile = conection.getContentLength();

    //TODO: input stream to read file - with 8k buffer
    InputStream input = new BufferedInputStream(url.openStream(), 8192);

    int bytesRead;
    data = new byte[lenghtOfFile];

    ByteArrayOutputStream output = new ByteArrayOutputStream();
    while ((bytesRead = input.read(data)) != -1) {
        total += bytesRead;
        publishProgress("" + (int) ((total * 100) / lenghtOfFile));
        output.write(data, 0, bytesRead);
    }

    //encrypt = simpleCrypto.encrypt(ENCRIPT_DECRIPT_KEY, data);
    input.close();

    encriptFile(output.toByteArray());
    output.flush();
    output.close();
    success = "1";

} catch (Exception e) {
    Log.e("Error: ", e.getMessage());
    success = "0";
    startTimer();
}