Comment utiliser ViewBinding dans un RecyclerView.Adapter?

Question

Puis-je utiliser ViewBindings pour remplacer findViewById dans ce RecyclerView.Adapter code d'initialisation? Je ne peux pas définir un binding val dans l'objet car les ViewHolders sont différents par cellule.

class CardListAdapter(private val cards: LiveData<List<Card>>) : RecyclerView.Adapter<CardListAdapter.CardViewHolder>() {

    class CardViewHolder(val cardView: View) : RecyclerView.ViewHolder(cardView)

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CardViewHolder {
        val binding = CardBinding.inflate(LayoutInflater.from(parent.context), parent, false)
        return CardViewHolder(binding.root)
    }

    override fun onBindViewHolder(holder: CardViewHolder, position: Int) {
        val title = holder.cardView.findViewById<TextView>(R.id.title)
        val description = holder.cardView.findViewById<TextView>(R.id.description)
        val value = holder.cardView.findViewById<TextView>(R.id.value)
        // ...
    }

Answer 1

J'en ai écrit un simple et réutilisable:

class ViewBindingVH private constructor(val binding: ViewBinding) :
    RecyclerView.ViewHolder(binding.root) {

    companion object {

        fun createVH(
            parent: ViewGroup,
            block: (inflater: LayoutInflater, container: ViewGroup, attach: Boolean) -> ViewBinding
        ) = ViewBindingVH(block(LayoutInflater.from(parent.context), parent, false))
    }
}


class CardAdapter : RecyclerView.Adapter<ViewBindingVH>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewBindingVH {
        return ViewBindingVH.createVH(parent, CardBinding::inflate)
    }

    override fun onBindViewHolder(holder: ViewBindingVH, position: Int) {
        val binding = holder.binding as CardBinding
    }

}