Notification.kt

        val PROGRESS_MAX = 100
        val PROGRESS_CURRENT = 0

        val notificationManagerCompat = NotificationManagerCompat.from(context)

        builder.setProgress(PROGRESS_MAX, PROGRESS_CURRENT, false)
        notificationManagerCompat.notify(1234, builder.build())

        CoroutineScope(Dispatchers.Default).launch {
            for (i in PROGRESS_CURRENT..PROGRESS_MAX step 10) {
                builder.setProgress(PROGRESS_MAX, i, false)
                notificationManagerCompat.notify(1234, builder.build());
                delay(1000)
            }
            delay(10000)
            builder.setContentText("Download complete")
                .setProgress(0, 0, false)
            notificationManagerCompat.notify(1234, builder.build())
        }