如何在 Android 上下载 mp3 文件？

Question

如何从 Android 下载目录中的 URL 下载 .mp3 文件？
使用OutputStream 和InputStream 显然不再起作用了。这是我尝试过的：

public class DownloadFile extends AsyncTask<String, Integer, String> {

    private final String videoUrl;

    public DownloadFile(String videoUrl) {
        this.videoUrl = videoUrl;
    }

    @Override
    protected String doInBackground(String... params) {
        try {
            URL url = new URL(videoUrl);
            URLConnection connection = url.openConnection();
            connection.connect();

            InputStream input = new BufferedInputStream(url.openStream());

            String test = Environment.getExternalStorageDirectory() + "/Download/test.mp3";
            OutputStream output = new FileOutputStream(test);

            byte[] data = new byte[1024];

            output.write(data);

            output.flush();
            output.close();
            input.close();
        } catch (Exception ignored) {
        }
        return null;
    }
}

这可以下载文件，但尝试播放时收到错误消息saying that I can't play this type of audio file。

另外，上面的代码来自previous question。

Answer 1

你知道 Android 的 DownloadManager 类吗 (https://developer.android.com/reference/android/app/DownloadManager)

 
DownloadManager.Request request = new DownloadManager.Request(Uri.parse("your url here"));
request.setDescription("Downloading");
request.setMimeType("audio/MP3");
request.setTitle("File :");
request.allowScanningByMediaScanner();         
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "audio.mp3");
DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
manager.enqueue(request);