MainActivity

MainActivity.kt

import android.app.Activity
import android.os.Bundle
import android.support.v7.widget.LinearLayoutManager
import android.support.v7.widget.RecyclerView
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import kotlinx.android.synthetic.main.activity_main.*
import kotlinx.android.synthetic.main.list_item_main.view.*

class MainActivity : Activity() {

  override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)
    recyclerView.layoutManager = LinearLayoutManager(this)
    recyclerView.adapter = Adapter(listOf("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"))
  }

  class Adapter(val data: List<String>) : RecyclerView.Adapter<Adapter.ViewHolder>() {

    override fun onBindViewHolder(viewHolder: ViewHolder, position: Int) {
      viewHolder.itemView.textView.text = data[position]
    }

    override fun onCreateViewHolder(parent: ViewGroup, position: Int): ViewHolder {
      return ViewHolder(LayoutInflater.from(parent.context).inflate(R.layout.list_item_main, parent, false))
    }
    override fun getItemCount(): Int {
      return data.size
    }

    class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView)
  }

}