A function to create a notification channel

channel.kt

fun createChannel(
        context: Context,
        channelId = CHANNEL_ID,
        @StringRes channelName: Int,
        @StringRes channelDescription: Int,
        importanceLevel: Int = NotificationManager.IMPORTANCE_HIGH
    ) {
        val channel = NotificationChannel(
            context.getString(channelId),
            context.getString(channelName),
            importanceLevel
        ).apply {
            description = context.getString(channelDescription)
        }

        val notificationManager =
            context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        notificationManager.createNotificationChannel(channel)