AnkoAdapter.kt

class AnkoViewHolder<out V : AnkoComponent<ViewGroup>>(val parent: ViewGroup, val createUI: () -> V) {
    class ViewHolder<out V : AnkoComponent<ViewGroup>>(val view: View, val ui: V) : RecyclerView.ViewHolder(view)

    val ankoContext by lazy { AnkoContext.createReusable(parent.context, parent) }
    val viewHolder by lazy {
        val ui = createUI()
        val view = ui.createView(ankoContext)
        view.setupTapEffectForBG(true) // default for every item in application
        // TODO some items may be disabled...
        ViewHolder(view, ui)
    }
}

abstract class AnkoAdapter<out V : AnkoComponent<ViewGroup>>(
        val createUI: () -> V,
        private val presentUI: (Int, V) -> Unit
) : RecyclerView.Adapter<AnkoViewHolder.ViewHolder<*>>() {
    final override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = AnkoViewHolder(parent, createUI).viewHolder
    override fun onBindViewHolder(holder: AnkoViewHolder.ViewHolder<*>, position: Int) = presentUI(position, holder.ui as V)
}

class AnkoListAdapter<out V : AnkoComponent<ViewGroup>, T>(
        private var list: List<T>,
        private val createUI: () -> V,
        private val presentUI: (T, V) -> Unit
) : RecyclerView.Adapter<AnkoViewHolder.ViewHolder<*>>() {
    var onClick: ((T) -> Unit)? = null
    var onLongClick: ((T) -> Unit)? = null

    override fun getItemCount() = list.size
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int) = AnkoViewHolder(parent, createUI).viewHolder
    override fun onBindViewHolder(holder: AnkoViewHolder.ViewHolder<*>, position: Int) {
        presentUI(list[position], holder.ui as V)
        holder.view.onClick { onClick?.invoke(list[position]) }
        holder.view.onLongClick {
            onLongClick?.invoke(list[position])
            onLongClick == null
        }
    }

    fun resetList(newList: List<T>) {
        list = newList
        notifyDataSetChanged()
    }
}