按demo写 布局不显示

`
val menu :TransformersLayout = TransformersLayout(requireContext())

    menu.load(iconData, object : TransformersHolderCreator<IconBean> {
        override fun getLayoutId(): Int {
            return R.layout.item_index
        }

        override fun createHolder(itemView: View): Holder<IconBean> {
            return meunViewHolder(itemView)
        }
    })

    grid_viewpager.addView(menu)`

log显示RecyclerView: No adapter attached; skipping layout