NotificationBuilderExample.kt

private fun buildSimpleNotification(): Notification {
    val pendingIntent: PendingIntent = getPendingIntent()

    val builder = NotificationCompat.Builder(this, CHANNEL_ID)
        .setSmallIcon(R.drawable.ic_android_black_24dp)
        .setContentTitle("Sample notification")
        .setContentText("This is the long content of the notification. Happy coding.")
        .setStyle(
            NotificationCompat.BigTextStyle()
                .bigText("This is much bigger content of the notification. Happy coding!")
        )
        .setPriority(NotificationCompat.PRIORITY_HIGH)
        .setContentIntent(pendingIntent)
    return builder.build()
}