Android Download manager is delayed and always unsuccessfull

Question

So, I'm trying to implement a download pdf feature for my app. Here is the code where i start the download manager.

val document = documents[i]
val request = DownloadManager.Request(Uri.parse("https://repository.bsi.ac.id/repo/files/256149/download/File_8-Bab-I-Pengenalan-Android.pdf"))
  .setAllowedNetworkTypes(DownloadManager.Request.NETWORK_WIFI)
  .setTitle("Downloading Pdf-Android")
  .setMimeType("application/pdf")
  .setDescription("File Description")
  .setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED)
  .setDestinationInExternalPublicDir(
                    Environment.DIRECTORY_DOWNLOADS,
                    "Pdf-Android.pdf"
                )

val filter = IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE)
applicationContext.registerReceiver(DownloadReceiver(), filter)
downloadManager.enqueue(request)

After quite some times, the download launch but failed immediately, and i can't really debug it since the logcat doesn't display anything. I have tried to set the allowed network types into celluar, give the permission for writing external files.

I tried to use the method from the answer, but for some reason i don't get any information in logcat. But the download still unsuccessfull and no log is found on logcat

i already register the broadcast receiver on manifset like this

<receiver
  android:name="somename.DownloadReceiver"
  android:enabled="true"
  android:exported="false">
    <intent-filter>
      <action android:name="android.intent.action.DOWNLOAD_COMPLETE" />
    </intent-filter>
</receiver>

Answer 1

It's a bit of an inconvenient situation; however, due to this code, we encounter the DownloadManager.STATUS_PAUSED error (Reason log is Download failed: 1). I discovered the relevant information from this link: DownloadManager. Despite encountering this error, the documentation pertaining to it is also quite inadequate. I just added a method like this to detect the cause of the problem.

val downloadId = downloadManager.enqueue(request)
lifecycleScope.launch {
    while (true) {
        checkDownloadStatus(applicationContext, downloadId)
        delay(10000)
    }
}


private fun checkDownloadStatus(context: Context?, downloadId: Long) {
    val downloadManager = context?.getSystemService(Context.DOWNLOAD_SERVICE) as DownloadManager
    val query = DownloadManager.Query().setFilterById(downloadId)
    val cursor = downloadManager.query(query)

    if (cursor.moveToFirst()) {
        Log.i("DownloadManager", "cursorStarted")
        try {
            val columnStatusIndex = cursor.getColumnIndex(DownloadManager.COLUMN_STATUS)
            val columnReasonIndex = cursor.getColumnIndex(DownloadManager.COLUMN_REASON)

            val status = cursor.getInt(columnStatusIndex)

            Log.i("DownloadManagerStatus", "$status")

            when (status) {
                DownloadManager.STATUS_SUCCESSFUL -> {
                    Log.i("DownloadManagerSuccess", "Download successful")
                }
                DownloadManager.STATUS_FAILED -> {
                    val reason = cursor.getInt(columnReasonIndex)
                    Log.e("DownloadManagerFailed", "Download failed: $reason")
                }
                DownloadManager.STATUS_PAUSED -> {
                    val reason = cursor.getInt(columnReasonIndex)
                    Log.e("DownloadManagerPaused", "Download paused: $reason")
                }

                else -> {
                    val reason = cursor.getInt(columnReasonIndex)
                    Log.e("DownloadManagerUnknown", "unknown : $reason")
                }
            }

        } catch (e: Exception) {
            e.printStackTrace()
        }
    }

    cursor.close()
}