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class GenericVH(val binding : ViewDataBinding): RecyclerView.ViewHolder(binding.root)

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open class BaseModel(@LayoutRes var resId: Int) : BaseObservable()

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override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): GenericVH {
    return GenericVH(DataBindingUtil.inflate(LayoutInflater.from(parent.context), viewType, parent, false))
}

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override fun getItemViewType(position: Int) = items[position].resId

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class Adapter<T : BaseModel>(val items: List<T>, val callback : (GenericVH, T)-> Unit) : RecyclerView.Adapter<Adapter.GenericVH>() {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): GenericVH {
        return GenericVH(DataBindingUtil.inflate(LayoutInflater.from(parent.context), viewType, parent, false))
    }

    override fun getItemCount() = items.size

    override fun getItemViewType(position: Int) = items[position].resId

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class Trip : BaseModel(R.layout.item_trip){
    var from : String = ""
    var to : String = ""

    fun onClick(view: View){
        Toast.makeText(view.context,"Trip => from : $from, to : $to", Toast.LENGTH_SHORT).show()
    }
}

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val items = ArrayList<BaseModel>()

items.add(Trip().apply {  from = "NewYork";  to = "Chicago"})
items.add(Trip().apply {  from = "London";  to = "Pennsylvania"})
items.add(Progress())

binding.recyclerView.adapter = Adapter(items){ holder, model ->
    when(holder.binding){
       is ItemTripBinding -> holder.binding.item = model as Trip
       is ProgressBinding -> holder.binding.item = model as Progress 

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{
	data: {
    "unreadTerm": "JP20180512"
   }
}