Android DataBinding 💛 RecyclerView

DataBindingAdapter.kt

import android.content.Context
import android.databinding.DataBindingUtil
import android.databinding.ViewDataBinding
import android.support.annotation.LayoutRes
import android.support.v7.widget.RecyclerView
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup

abstract class DataBindingAdapter<E, T : ViewDataBinding>(val context: Context, @LayoutRes private val layoutId: Int) : RecyclerView.Adapter<DataBindingAdapter.DataBindingViewHolder<T>>() {
    var items = mutableListOf<E>()
        set(value) {
            field = value
            notifyDataSetChanged()
        }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): DataBindingViewHolder<T> {
        val view = LayoutInflater.from(context).inflate(layoutId, parent, false)
        return DataBindingViewHolder(view)
    }

    override fun getItemCount(): Int = items.size

    override fun onBindViewHolder(holder: DataBindingViewHolder<T>, position: Int) {
        val item = items[holder.adapterPosition]
        bind(holder, item)
        holder.binding.executePendingBindings()
    }

    fun add(item: E) {
        items.add(item)
        notifyDataSetChanged()
    }

    fun remove(item: E) {
        items.remove(item)
        notifyDataSetChanged()
    }

    abstract fun bind(holder: DataBindingViewHolder<T>, item: E)

    class DataBindingViewHolder<out T : ViewDataBinding>(view: View) : RecyclerView.ViewHolder(view) {
        val binding: T = DataBindingUtil.bind(view)
    }
}

MainActivity.kt

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val adapter = EmployeeAdapter(this)
        binding.recyclerView.layoutManager = LinearLayoutManager(this)
        binding.recyclerView.adapter = adapter
    }
}

class EmployeeAdapter(context: Context) : DataBindingAdapter<EmployeeData, ListManageEmployeeBinding>(context, R.layout.list_manage_employee) {
    override fun bind(holder: DataBindingViewHolder<ListManageEmployeeBinding>, item: EmployeeData) {
        holder.binding.employee = item
    }
}