Downloaded files get deleted automatically
In my app, there are a few files that users can download. The files get downloaded via the android download manager. But, since a few weeks now, hundreds of users have been complaining that their files automatically keep deleting every 8-12 days, without them even uninstalling the app. (There might be many more users who haven't bothered to complain about the same.)
Now, there could be a number of user-specific reasons why that would happen on a few devices. But considering the huge number of users, it seems that I might have been doing something wrong.
Why would the system/download manager delete the files automatically? Is there a way to inform the system or the download manager to not delete certain files? Or should I just settle with renaming the files after downloading, so as to unlink them from the download manager, and hope that the problem gets solved with just that?
Edit:
Here's the code that I use to download the files:
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(trackLink));
request.setTitle(trackTitle);
request.setDestinationInExternalPublicDir("Tracks", trackTitle + ".mp3");
request.setVisibleInDownloadsUi(false);
DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
manager.enqueue(request);
Answer
I also came across this issue. Looking at the source for DownloadIdleService it appears that if the download are set to not be visible in the UI they're deleted after 7 days as they're considered "stale".
Here's the javadoc fromDownloadIdleService:
/**
* Remove stale downloads that third-party apps probably forgot about. We
* only consider non-visible downloads that haven't been touched in over a
* week.
*/