Notification - Notifications provide short, timely information about events in your app while it's not in use

val notification= NotificationCompat.Builder(this, channel_id)
            .setContentTitle("Awesome Notification :)")
            .setContentText("This is the content text")
            .setSmallIcon(R.drawable.star)
            .setPriority(NotificationCompat.PRIORITY_HIGH)
            .setContentIntent(pendingIntent)
            .build()

  private fun createNotificationChannel(){
        if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.O){
            val channel= NotificationChannel(channel_id,channel_name,
            NotificationManager.IMPORTANCE_DEFAULT).apply {
                lightColor= Color.GREEN
                enableLights(true)
            }
            val manager = getSystemService(NOTIFICATION_SERVICE)as NotificationManager
            manager.createNotificationChannel(channel) 
       }

createNotificationChannel()
// Create an explicit intent for an Activity in your app
      val intent= Intent(this,MainActivity::class.java)
      val pendingIntent= TaskStackBuilder.create(this).run{
          addNextIntentWithParentStack(intent)
          getPendingIntent(0, PendingIntent.FLAG_UPDATE_CURRENT)