android - カスタム レイアウトを追加してもカスタム通知が作成されない

Question

アプリ呼び出し通知のようなカスタム通知を作成する必要があります。カスタム レイアウトを NotificationCompat Builder に追加すると、通知が作成されません。以下は、通知を作成するための私のコードです。通知の作成

   context?.let {

        val notificationLayout = RemoteViews(it.packageName, R.layout.custom_notification_collapsed)
        val notificationLayoutExpanded = RemoteViews(it.packageName, R.layout.custom_notification)

        notificationLayout.setImageViewResource(R.id.iv_icon, R.drawable.icon)
        notificationLayout.setTextViewText(R.id.tv_app_name, it.getString(R.string.app_name))
        notificationLayout.setTextViewText(R.id.time_stamp, it.getString(R.string.just_now))

        notificationLayoutExpanded.setImageViewResource(R.id.iv_icon,R.drawable.icon)
        notificationLayoutExpanded.setTextViewText(R.id.tv_app_name, it.getString(R.string.app_name))
        notificationLayoutExpanded.setTextViewText(R.id.content, it.getString(R.string.text))
        notificationLayout.setTextViewText(R.id.time_stamp, it.getString(R.string.just_now))

        var builder = NotificationCompat.Builder(it, AppConstants.CHANNEL_ID)
                .setSmallIcon(R.drawable.notification_icon)
                .setTicker("Noification is created")
                .setPriority(NotificationCompat.PRIORITY_HIGH)
                .setCustomContentView(notificationLayout)
                .setCustomBigContentView(notificationLayoutExpanded)


        var customNotificationCompat: NotificationManagerCompat = NotificationManagerCompat.from(it)
        customNotificationCompat.notify(0, builder.build())

    }

Channel を作成し、Application クラスから呼び出します。

    fun createNotificationChannel(context: Context) {

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
        val name = context.getString(R.string.app_name)
        val descriptionText = context.getString(R.string.text)
        val importance = NotificationManager.IMPORTANCE_HIGH
        val channel = NotificationChannel(AppConstants.CHANNEL_ID, name, importance).apply {
            description = descriptionText
        }
        // Register the channel with the system
        val notificationManager: NotificationManager =
                context.getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        notificationManager.createNotificationChannel(channel)
    }
}