Dynamic Recyclerview Adapter

adapter

import android.annotation.SuppressLint
import android.view.LayoutInflater
import android.view.ViewGroup
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.ListAdapter
import androidx.recyclerview.widget.RecyclerView
import androidx.viewbinding.ViewBinding

class DynamicAdapter<T : Any, VB : ViewBinding>(
    private val inflate: (LayoutInflater, ViewGroup, Boolean) -> VB,
    private val onBind: VB.(T) -> Unit,
    diffUtil: DiffUtil.ItemCallback<T> = GenericDiffUtilCallback()
) : ListAdapter<T, DynamicAdapter<T, VB>.ViewHolder>(diffUtil) {

    inner class ViewHolder(private val binding: VB) :
        RecyclerView.ViewHolder(binding.root) {
        fun bind(item: T) {
            onBind(binding, item)
        }
    }

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

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        getItem(position)?.let {
            holder.bind(it)
        }
    }

    class GenericDiffUtilCallback<T : Any> : DiffUtil.ItemCallback<T>() {
        override fun areItemsTheSame(oldItem: T, newItem: T): Boolean {
            return oldItem === newItem
        }

        @SuppressLint("DiffUtilEquals")
        override fun areContentsTheSame(oldItem: T, newItem: T): Boolean {
            return oldItem == newItem
        }
    }
}

example

  DynamicAdapter<Item, ItemBinding>(
            inflate = { inflater, parent, attachToParent ->
                ListItemBinding.inflate(inflater, parent, attachToParent)
            },
            onBind = { item ->
                tvTitle.text = item.title
                tvSubtitle.text = item.subtitle
                tvMsg.text = item.content
            },
        )