DataBinding BaseAdapter for RecyclerView by Kotlin

activity_my.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"
    xmlns:tools="http://schemas.android.com/tools">

    <data>
    </data>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:padding="16dp"
        tools:context=".MyActivity">

        <androidx.recyclerview.widget.RecyclerView
            android:id="@+id/rv"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            tools:listitem="@layout/row_user_item" />
    </LinearLayout>

</layout>

BaseAdapter.kt

abstract class BaseAdapter<T>(private val itemClickListener: OnItemClickListener<T>) :
    RecyclerView.Adapter<BaseAdapter<T>.MyViewHolder>() {

    interface OnItemClickListener<T> {
        fun onItemClick(item: T)
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): MyViewHolder {
        val binding = DataBindingUtil.inflate<ViewDataBinding>(
            LayoutInflater.from(parent.context),
            viewType,
            parent,
            false
        )
        return MyViewHolder(binding)
    }

    override fun onBindViewHolder(holder: MyViewHolder, position: Int) {
        val item = getItemForPosition(position)

        holder.itemView.setOnClickListener { itemClickListener.onItemClick(item) }

        holder.bind(item)
    }

    abstract override fun getItemCount(): Int

    override fun getItemViewType(position: Int): Int {
        return getLayoutIdForPosition(position)
    }

    abstract fun getItemForPosition(position: Int): T

    abstract fun getLayoutIdForPosition(position: Int): Int

    inner class MyViewHolder(private val binding: ViewDataBinding) :
        RecyclerView.ViewHolder(binding.root) {

        fun bind(obj: T) {
            binding.setVariable(BR.obj, obj)
            binding.executePendingBindings()
        }
    }
}

MyActivity.kt

class MyActivity : BaseActivity() {

    private lateinit var binding: ActivityMyBinding
    private val userList = ArrayList<User>()
    private lateinit var mAdapter: UserAdapter
    private lateinit var recyclerView: RecyclerView

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = DataBindingUtil.setContentView(this, R.layout.activity_my)
        binding.lifecycleOwner = this

        setDummyData()

        initRecyclerView()
    }

    private fun setDummyData() {
        userList.addAll(
            listOf(
                User("tehran", "021", 28, false),
                User("ali ahmadi", "[email protected]", 5, false),
                User("rastin samsami", "[email protected]", 8, true),
                User("samad hosseini", "[email protected]", 25, false),
                User("pooyan hosseini", "[email protected]", 33, true),
                User("yalda soleimani", "[email protected]", 54, false)
            )
        )
    }

    private fun initRecyclerView() {
        recyclerView = binding.rv
        mAdapter = UserAdapter(object : BaseAdapter.OnItemClickListener<User> {
            override fun onItemClick(item: User) {
                Toast.makeText(this@MyActivity, ""+item.name, Toast.LENGTH_SHORT).show()
            }
        })
        recyclerView.layoutManager = LinearLayoutManager(this, RecyclerView.VERTICAL, false)
        recyclerView.adapter = mAdapter

        mAdapter.addData(userList)
    }
}

row_user_item.xml

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools">

    <data>

        <variable
            name="obj"
            type="com.rhosseini.databindingsample.data.User" />
    </data>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="64dp"
        android:clickable="true"
        android:background="?attr/selectableItemBackground"
        android:gravity="center_vertical"
        android:orientation="horizontal"
        android:padding="8dp">

        <TextView
            android:id="@+id/age"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:textAppearance="@style/TextAppearance.AppCompat.Large"
            android:layout_marginStart="16dp"
            android:text="@{String.valueOf(obj.age)}"
            tools:text="36"/>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_marginStart="16dp"
            android:orientation="vertical">

            <TextView
                android:id="@+id/name"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:textAppearance="@style/TextAppearance.AppCompat.Medium"
                android:text="@{obj.name}"
                tools:text="samad samsami"/>

            <TextView
                android:id="@+id/email"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="@{obj.email}"
                tools:text="[email protected]"/>

        </LinearLayout>

    </LinearLayout>

</layout>

UserAdapter.kt

class UserAdapter(itemClickListener: OnItemClickListener<User>) :
    BaseAdapter<User>(itemClickListener) {

    private var data: ArrayList<User> = ArrayList()

    override fun getItemCount(): Int = data.size

    override fun getItemForPosition(position: Int): User = data[position]

    override fun getLayoutIdForPosition(position: Int): Int {
        return R.layout.row_user_item
    }

    fun addData(data: ArrayList<User>) {
        this.data.addAll(data)
        notifyDataSetChanged()
    }

    fun updateData(data: ArrayList<User>) {
        this.data = data
        notifyDataSetChanged()
    }
}

is this available with diffutils library