https://ferrand-d.medium.com/paging-image-gallery-with-recyclerview-f059d035b7e7

PagingImageGallery_overlayableImageView.kt

class OverlayableImageView @JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null,
    defStyleAttr: Int = 0
) : ConstraintLayout(context, attrs, defStyleAttr) {

    private val imageView: ImageView
    private val sendButton: ImageButton

    init {
        imageView = ...
        sendButton = ...

        // android:animateLayoutChanges="true" for cross-fade
        layoutTransition = LayoutTransition()

        isActivated = false
    }

    override fun setActivated(activated: Boolean) {
        val isChanging = activated != isActivated
        super.setActivated(activated)

        if (isChanging) {
            // Switch between VISIBLE and INVISIBLE
            sendButton.isInvisible = !activated
        }
    }
}