asascode.kt

class AlarmService : Service() {
    val TAG = "AlarmService"
    private val INTERVAL_TIME = 60L * 1000L
    private val messenger = Messenger(IncomingHandler())
    private val binder = LocalBinder()

    override fun onBind(intent: Intent?): IBinder? {

        return binder

    }

    @SuppressLint("MissingPermission")
    override fun onStartCommand(intent: Intent?, flags: Int, startId: Int): Int {

        createNotification()
        return START_STICKY
    }

    private inner class IncomingHandler : Handler(Looper.getMainLooper()) {
        override fun handleMessage(msg: Message) {
            // Handle messages from Activity
            Toast.makeText(this@AlarmService, msg.data.getString("msg"), Toast.LENGTH_LONG).show()
        }
    }

    inner class LocalBinder : Binder() {
        fun getService(): AlarmService = this@AlarmService
        fun getMessenger(): Messenger = messenger
    }

    private fun createNotificationChannel() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val importance = NotificationManager.IMPORTANCE_HIGH

            val serviceChannel = NotificationChannel(
                "NOTIFICATION_CHANNEL", "My Service Channel", importance
            )
            val manager = getSystemService(NotificationManager::class.java)
            manager?.createNotificationChannel(serviceChannel)
        }
    }

    private fun createNotification() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            createNotificationChannel()
        }
        val CHANNEL_ID = "my_app"
        val NOTIFICATION_ID = 1
        val notificationIntent = Intent(this, SecondActivity::class.java)
        val pendingIntent = PendingIntent.getActivity(this, 0, notificationIntent, FLAG_IMMUTABLE)
        val notification =
            NotificationCompat.Builder(this, CHANNEL_ID).setContentTitle("Service Running")
                .setContentText("Your service is running in the background").setPriority(
                    NotificationCompat.PRIORITY_DEFAULT
                ).setForegroundServiceBehavior(NotificationCompat.FOREGROUND_SERVICE_IMMEDIATE)
                .setSmallIcon(R.drawable.common_google_signin_btn_icon_dark)
                .setContentIntent(pendingIntent).build()
        startForeground(NOTIFICATION_ID, notification)
    }

}