Download notification disappearing

[kelson42]

I have no clear reproduction steps, but downloading large files at some point make the download notification disappearing.

[MohitMaliFtechiz]

@kelson42 Can you please provide some addtional information so that the problem can be narrowed down?

• Which version of Android were you testing this scenario on?
• How much large file you were downloading? I am testing this with 6.4GB, and 9GB files.
• Did the notification disappear when the application was running or in the background or did disappear when the application was closed?
• Did the notification permanently disappear?

[kelson42]

Android 13, only one download at a time. It disappear I believe after a while if I don't use the device and never reapoear... but downloads continues (I see it in the library).

[MohitMaliFtechiz]

@kelson42 I have tested this issue with different large zim files, and left the phone until the files were not downloading, and monitored the behavior but the notification was visible all the time. The notification only disappeared when I killed the application(closed from the background list), and again visible when I reopened the application. Apart from this, the notification is triggering from the fetch lib with the downloadProgress see the below method of fetch lib.

https://github.com/tonyofrancis/Fetch/blob/c450f681035ed47d2bd6e5e2b7cf4b921665e669/fetch2/src/main/java/com/tonyodev/fetch2/fetch/ListenerCoordinator.kt#L413

override fun progress(download: Download, etaInMilliSeconds: Long, downloadedBytesPerSecond: Long) {
            synchronized(lock) {
                fetchNotificationHandler.post {
                    synchronized(lock) {
                        for (fetchNotificationManager in fetchNotificationManagerList) {
                            if (fetchNotificationManager.postDownloadUpdate(download)) break
                        }
                    }
                }
                fetchListenerMap.values.forEach {
                    val iterator = it.iterator()
                    while (iterator.hasNext()) {
                        val fetchListener = iterator.next().get()
                        if (fetchListener == null) {
                            iterator.remove()
                        } else {
                            uiHandler.post {
                                fetchListener.onProgress(download, etaInMilliSeconds, downloadedBytesPerSecond)
                            }
                        }
                    }
                }
                if (fetchGroupListenerMap.isNotEmpty()) {
                    val groupId = download.group
                    val fetchGroup = groupInfoProvider.getGroupReplace(groupId, download, Reason.DOWNLOAD_PROGRESS_CHANGED)
                    fetchGroupListenerMap.values.forEach {
                        val iterator = it.iterator()
                        while (iterator.hasNext()) {
                            val fetchListener = iterator.next().get()
                            if (fetchListener == null) {
                                iterator.remove()
                            } else {
                                fetchListener.onProgress(groupId, download, etaInMilliSeconds, downloadedBytesPerSecond, fetchGroup)
                            }
                        }
                    }
                } else {
                    groupInfoProvider.postGroupReplace(download.group, download, Reason.DOWNLOAD_PROGRESS_CHANGED)
                }
                val downloadObserverSet = downloadsObserverMap[download.id]
                downloadObserverSet?.forEach {
                    val observer = it.get()
                    if (observer != null) {
                        uiHandler.post {
                            observer.onChanged(download, Reason.DOWNLOAD_PROGRESS_CHANGED)
                        }
                    }
                }
            }
        }

In the above code, notification and downloadProgress are triggering via this method.

This code triggers the notification

for (fetchNotificationManager in fetchNotificationManagerList) {
      if (fetchNotificationManager.postDownloadUpdate(download)) break
}

As you mentioned downloads continue so this method is running as it is publishing the download progress via below method, and we are handling this progress and showing it in LocalLibrary.

fetchListener.onProgress(download, etaInMilliSeconds, downloadedBytesPerSecond)

So the postDownloadUpdate method is not calling which updates the notification, somehow the fetchNotificationManager listener was removed. The removal and adding of the fetchNotificationManager listener is internal to fetch. The notification disappears after 10 seconds if it is not updated(To handle the app killing scenarios).

[kelson42]

I will retest once #3940 is merged