我有一个构造RecyclerView的适配器类。我希望这个RecyclerView有一个按钮，更新RecyclerView外部的ImageView。这段代码更新了RecyclerView内部的图像，但我无法让它更新外部的图像。

class CustomAdapter(private val mList: List<ItemsViewModel>) : RecyclerView.Adapter<CustomAdapter.ViewHolder>() {
    // create new views
    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        // inflates the card_view_design view
        // that is used to hold list item
        val mainXML = LayoutInflater.from(parent.context)
            .inflate(R.layout.activity_main, parent, false)
        val view = LayoutInflater.from(parent.context)
            .inflate(R.layout.card_view_design, parent, false)
        return ViewHolder(view, mainXML)
    }
    // binds the list items to a view
    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        val ItemsViewModel = mList[position]
        // sets the image to the imageview from our itemHolder class
        Picasso.get().load("https://img.pokemondb.net/sprites/x-y/normal/" + ItemsViewModel.text + ".png").into(holder.imageView)
        // sets the text to the textview from our itemHolder class
        holder.textView.text = ItemsViewModel.text
        holder.buttonView.setOnClickListener {
                Log.e("GIF selecter", holder.pokemonSelect.toString())
                holder.pokemonSelect.setImageResource(R.drawable.ic_launcher_background)
                Picasso.get().load("https://img.pokemondb.net/sprites/x-y/normal/golbat.png").into(holder.pokemonSelect) //This is the line of troubles, changing it to "holder.imageView" changes the image inside the recyclerview. I want it to change an image outside the recyclerview
            }
        }
    // return the number of the items in the list
    override fun getItemCount(): Int {
        return mList.size
    }
    // Holds the views for adding it to image and text
    class ViewHolder(ItemView: View, mainPage: View) : RecyclerView.ViewHolder(ItemView) {
        val pokemonSelect: ImageView = mainPage.findViewById(R.id.pokemonSelect)
        val imageView: ImageView = itemView.findViewById(R.id.pokemonImg)
        val textView: TextView = itemView.findViewById(R.id.pokemon)
        val buttonView: Button = itemView.findViewById(R.id.changeGIF)
    }
}