android DownloadManager通知不可见

Question

我正在尝试使用DownloadManager下载文件，下载开始，但未查看任何通知。仅在android API上尝试过27

val url="http://exmaple.com/mp4.mp4"
val request = DownloadManager.Request(Uri.parse(url))
                   .setTitle("Dummy File")
                   .setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE)
                   .setAllowedOverMetered(true)
                   .setVisibleInDownloadsUi(true)

val downloadManager = getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
downloadManager.enqueue(request)

Answer 1

问题不在于您的代码，我在尝试时发现了此问题。

W/DownloadManager: [151] Stop requested with status BAD_REQUEST: Cleartext traffic not permitted for UID 10202: http://exmaple.com/...

尝试“ https://sample-videos.com/video123/mp4/720/big_buck_bunny_720p_20mb.mp4”示例视频效果很好。

快乐的编码...）