Creates Notification from FCM Service With Image

MyFirebaseMessagingService.kt

private fun showNotification(remoteMessage: RemoteMessage) {
        val intent = Intent(this, SplashActivity::class.java)
        val pendingIntent = PendingIntent.getActivity(this, 123, intent, PendingIntent.FLAG_ONE_SHOT)
        val channelId = getString(R.string.default_notification_channel_id)
        val defaultSoundUri: Uri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)
        val notificationBuilder: NotificationCompat.Builder =
            NotificationCompat.Builder(this, channelId)
                .setSmallIcon(R.drawable.notification_icon)
                .setContentTitle(remoteMessage.notification!!.title)
                .setContentText(remoteMessage.notification!!.body)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent)

        val notificationManager = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager

        // Since android Oreo notification channel is needed.

        // Since android Oreo notification channel is needed.
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            val channel = NotificationChannel(channelId, "Default Channel", NotificationManager.IMPORTANCE_HIGH)
            notificationManager.createNotificationChannel(channel)
        }
        if (remoteMessage.notification?.imageUrl != null) {
            val url = remoteMessage.notification?.imageUrl
            Glide.with(this).asBitmap().load(url).into(object : CustomTarget<Bitmap>() {
                override fun onResourceReady(resource: Bitmap, transition: com.bumptech.glide.request.transition.Transition<in Bitmap>?) {
                    val bitmap: Bitmap = resource
                    notificationBuilder.setStyle(NotificationCompat.BigPictureStyle().bigPicture(bitmap).bigLargeIcon(null)).setLargeIcon(bitmap)
                    notificationManager.notify(123, notificationBuilder.build())
                }
                override fun onLoadCleared(placeholder: Drawable?) {
                }
            })
            return
        }
        notificationManager.notify(123, notificationBuilder.build())
    }