recycler adapter and data

databindingutils.kt

@BindingAdapter("bind_items")
fun setBindiItems(view : RecyclerView, itesm : List<Item>) {
  val adapter = view.adapter as? MainAdapter ?: ItemAdapter().apply { view.adapter = this }
  adapter.items = items
  adapter.notifyDatasetChanged()
}

ItemAdapter.kt

class ItemAdapter : RecyclerView.Adapter() {
  var items : List<Item> = emptyList()
}

MainViewModel.kt

class MainViewModel {
  val items = ObservableArrayList() 
  init {
    items.add(Item("John"))
    items.add(Item("Charles"))
  }
}

recycler.xml

<?xml version="1.0" encoding="utf-8"?>
<layout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <data>
        <variable name="vm" type="MainViewModel" />
    </data>

<android.support.v7.widget.RecyclerView
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:bind_items="@{vm.items} />

</layout>

thank you for your medium post.
reporting small typo in databindingutils.kt
itesm ==> items