BookAdapter.kt

class BookAdapter : RecyclerView.Adapter<BookViewHolder() {
    private var mEventItemBook: EventItemBook? = null
    fun setListenerEventItemBook(eventItemBook: EventItemBook) {
        this.mEventItemBook = eventItemBook
    }
///////
  inner class BookViewHolder(): RecyclerView.ViewHolder(itemView) {
    val mIconFavorite= itemView.findViewById(R.id.favorite)
       init {
           mIconFavorite.setOnClickListener {
               if (isFavorite) {
                   mEventItemBook?.removeFavoriteBook(mBook)
               } else {
                   mEventItemBook?.addFavoriteBook(mBook)
               }
           }
           itemView.setOnClickListener {
               mEventItemBook?.actionOpenBook(mBook)
           }
           itemView.setOnLongClickListener {
               mEventItemBook?.openMenuBook(mBook)
               false
           }
        }
    }
}