android_foreground_service.kt

class MyService : Service() {
    companion object {
        const val TAG = "MyService"
        const val CHNNEL_ID = "my-service"
    }

    override fun onCreate() {
        super.onCreate()
        Log.i(TAG, "onCreate")
        // create notification channel for API 26+
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val channel = NotificationChannel(CHNNEL_ID, CHNNEL_ID, NotificationManager.IMPORTANCE_DEFAULT).apply {
                description = "port sip service"
            }
            val notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
            notificationManager.createNotificationChannel(channel)
        }
        showServiceNotification()
    }

    private fun showServiceNotification() {
        Log.i(TAG, "showServiceNotification")
        val pendingIntent = Intent(this, MainActivity::class.java).let {
            PendingIntent.getActivity(this, 0, it, 0)
        }
        var builder = NotificationCompat.Builder(this, CHNNEL_ID)
            .setSmallIcon(R.drawable.ic_notification)
            .setContentTitle("MY Service")
            .setContentText("Service is running.")
            .setPriority(NotificationCompat.PRIORITY_DEFAULT)
            .setContentIntent(pendingIntent)

        startForeground(123, builder.build())
    }

    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {
        Log.i(TAG, "onStartCommand")
        return super.onStartCommand(intent, flags, startId)
    }

    override fun onBind(p0: Intent?): IBinder? {
        return null
    }

    override fun onDestroy() {
        super.onDestroy()
    }

}