6. PageTransformer

class WapplePageTransformer : ViewPager2.PageTransformer {
    override fun transformPage(page: View, position: Float) {
        with(page) {
            val translate = resources.getDimension(R.dimen.view_pager_translate)
            val scale = 0.88f
            when {
                position < -1 -> alpha = 0f
                position > 1 -> alpha = 0f
                else -> {
                    alpha = 1f
                    translationX = position * translate
                    scaleY = max(scale, 1 - abs(position))
                }
            }
        }
    }
}
Kotlin
복사

class HomeWappleAdapter : ListAdapter<Int, HomeWappleAdapter.HomeWappleViewHolder>(diffUtil) {
    init {
        submitList(listOf(1, 2, 3, 4, 5, 6, 7, 8, 9))
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): HomeWappleViewHolder {
        val inflater = LayoutInflater.from(parent.context)
        val binding = ItemHomeWappleBinding.inflate(inflater, parent, false)
        return HomeWappleViewHolder(binding)
    }

    override fun onBindViewHolder(holder: HomeWappleViewHolder, position: Int) {
    }

    class HomeWappleViewHolder(binding: ItemHomeWappleBinding) :
        RecyclerView.ViewHolder(binding.root)

    companion object {
        private val diffUtil = object : DiffUtil.ItemCallback<Int>() {
            override fun areItemsTheSame(oldItem: Int, newItem: Int): Boolean {
                return oldItem == newItem
            }

            override fun areContentsTheSame(oldItem: Int, newItem: Int): Boolean {
                return oldItem == newItem
            }
        }
    }
}
Kotlin
복사