ForegroundWorker.kt

class ForegroundWorker(context: Context, parameters: WorkerParameters) :
    CoroutineWorker(context, parameters) {
    private val notificationManager =
        context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager

    override suspend fun doWork(): ListenableWorker.Result = withContext(Dispatchers.IO) {
        setForeground(createForegroundInfo())
        return@withContext runCatching {
            runTask()
            Result.success()
        }.getOrElse {
            Result.failure()
        }
    }

    //Fake long running task for 60 seconds
    private suspend fun runTask() {
        delay(60000)
    }

    //Creates notifications for service
    private fun createForegroundInfo(): ForegroundInfo {
        val id = "1225"
        val channelName = "Downloads Notification"
        val title = "Downloading"
        val cancel = "Cancel"
        val body = "Long running task is running"

        val intent = WorkManager.getInstance(applicationContext)
            .createCancelPendingIntent(getId())

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            createChannel(id, channelName)
        }

        val notification = NotificationCompat.Builder(applicationContext, id)
            .setContentTitle(title)
            .setTicker(title)
            .setContentText(body)
            .setSmallIcon(R.drawable.ic_notification)
            .setOngoing(true)
            .addAction(android.R.drawable.ic_delete, cancel, intent)
            .build()

        return ForegroundInfo(1, notification)
    }

    @RequiresApi(Build.VERSION_CODES.O)
    private fun createChannel(id: String, channelName: String) {
        notificationManager.createNotificationChannel(
            NotificationChannel(id, channelName, NotificationManager.IMPORTANCE_DEFAULT)
        )
    }
}