ForegroundService.kt

// MyStartedForegroundService.kt
class MyStartedForegroundService: Service() {
    private val NOTIFICATION_ID = 12345
    private fun createNotification(): Notification {
        //...
    }

    private fun doWork(startId: Int, url: String) {
        startForeground(NOTIFICATION_ID, createNotification())
        // Let's fetch something using the url
        stopSelf(startId)
    }
    override fun (intent: Intent?, flags: Int, startId: Int): Int {
        intent?.getStringExtra("EXTRA_URL")?.let {
            doWork(startId, it)
        }
        return START_REDELIVER_INTENT
    }
    
    override fun onBind(intent: Intent): IBinder? {
        // If we don't need to support binding for the service we return a null IBinder
        return null
    }
}