RecyclerAdapter, one adapter for all recycler view for https://medium.com/@tonny/recyclerview-2020-when-recyclerview-meets-data-binding-616ca5c2147d

RecyclerAdapter.kt

override fun getItemViewType(position: Int) 
 = requireNotNull(
  getItem(position)?.layoutId ?: placeholderId
 ){
  "item at $position is null"
 }

override fun onCreateViewHolder(
 parent: ViewGroup, 
 viewType: Int) 
= ViewHolder(
   DataBindingUtil.inflate(
    LayoutInflater.from(parent.context),
    viewType, parent, false
   )
  ).also { viewHolder ->
          
   if (viewType != placeholderId 
    && listener != null) {
      
     viewHolder.itemView.setOnClickListener {
      
      val position = viewHolder.absoluteAdapterPosition
      
      val item = getItem(position) 
       ?: return@setOnClickListener
          
      listener.invoke(
       this@RecyclerAdapter, 
       position, 
       item)
     }
    }
  }