recyclerview that does not remove on swipe

activity.kt

package com.example.android.recyclerviewswipe

import android.content.Context
import android.os.Bundle
import android.view.LayoutInflater
import android.view.ViewGroup
import androidx.appcompat.app.AppCompatActivity
import androidx.appcompat.widget.AppCompatCheckBox
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.ItemTouchHelper
import androidx.recyclerview.widget.ListAdapter
import androidx.recyclerview.widget.RecyclerView
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val adapter = ItemAdapter()
        adapter.submitList(ITEMS)
        list.adapter = adapter
        val touchHelper = ItemTouchHelper(
            object : ItemTouchHelper.Callback() {
                override fun getMovementFlags(
                    recyclerView: RecyclerView,
                    viewHolder: RecyclerView.ViewHolder
                ): Int {
                    return makeMovementFlags(
                        0,
                        ItemTouchHelper.END
                    )
                }

                override fun onMove(
                    recyclerView: RecyclerView,
                    viewHolder: RecyclerView.ViewHolder,
                    target: RecyclerView.ViewHolder
                ): Boolean {
                    return false
                }

                override fun clearView(
                    recyclerView: RecyclerView,
                    viewHolder: RecyclerView.ViewHolder
                ) {
                    super.clearView(recyclerView, viewHolder)
                }

                override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
                    if (viewHolder is ItemViewHolder) {
                        viewHolder.item?.let {
                            val id = it.id
                            adapter.submitList(
                                adapter.currentList.map {
                                    if (it.id == id) {
                                        it.copy(
                                            checked = !it.checked
                                        )
                                    } else {
                                        it
                                    }
                                }
                            )
                        }
                    }
                }

            }
        )
        touchHelper.attachToRecyclerView(list)
    }
}

data class Item(
    val id: Int,
    val value: String,
    val checked: Boolean
)

class ItemViewHolder(parent: ViewGroup) : RecyclerView.ViewHolder(
    LayoutInflater.from(parent.context).inflate(R.layout.item, parent, false)
) {
    val checkbox = itemView as AppCompatCheckBox
    var item: Item? = null
}

class ItemAdapter : ListAdapter<Item, ItemViewHolder>(
    object : DiffUtil.ItemCallback<Item>() {
        override fun areItemsTheSame(oldItem: Item, newItem: Item): Boolean {
            return oldItem.id == newItem.id
        }

        override fun areContentsTheSame(oldItem: Item, newItem: Item): Boolean {
            return oldItem == newItem
        }
    }
) {
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ItemViewHolder {
        return ItemViewHolder(parent)
    }

    override fun onBindViewHolder(holder: ItemViewHolder, position: Int) {
        val item = getItem(position)
        holder.checkbox.isChecked = item.checked
        holder.checkbox.text = item.value
        holder.item = item
    }
}


val CHEESE_NAMES = listOf(
    "Abbaye de Belloc", "Abbaye du Mont des Cats", "Abertam", "Abondance", "Ackawi",
    "Acorn", "Adelost", "Affidelice au Chablis", "Afuega'l Pitu", "Airag", "Airedale",
    "Aisy Cendre", "Allgauer Emmentaler", "Alverca"
)
val ITEMS = CHEESE_NAMES.mapIndexed { index, name ->
    Item(index, name, false)
}