问如何访问片段中回收视图中每个项目的共享首选项

EN

class RecyclerViewAdapter : RecyclerView.Adapter<RecyclerViewAdapter.ViewHolder>() {

private val name = arrayOf("Android Dev W1",
    "Android Dev W2", "Web Dev W1", "Learn Kotlin B1",
    "Android Dev W3", "Android Dev W4", "Web Dev W2",
    "Learn DSA")

private val date = arrayOf("20:00 18th May, 2021", "04:00 18th May, 2021",
    "07:00 19th May, 2021", "04:00 20th May, 2021",
    "01:00 21th May, 2021", "10:00 21th May, 2021",
    "20:00 27th May, 2021", "10:00 30th May, 2021")

private val btn = arrayOf(false, false, false, false, false, false, false, false)

inner class ViewHolder(itemView: View) : RecyclerView.ViewHolder(itemView) {

    var itemName: TextView = itemView.findViewById(R.id.workshopName)
    var itemDate: TextView = itemView.findViewById(R.id.workshopDate)
    var button: Button = itemView.findViewById(R.id.applyBtn)

    val prefs = itemView.context.getSharedPreferences("prefs", MODE_PRIVATE)

    init {

        for(i in 0 .. 7) {
            //checking via sharedPreferences if this app is being run first time or not
            btn[i] = prefs.getBoolean("registered$i", false)
            if (btn[i]) {
                hideButton()
            } else {
                showButton()
            }
        }

    }

     fun hideButton() {
         button.text = "Applied"
         button.isClickable = false
         button.setBackgroundColor(Color.parseColor("#FF3700E9"))
    }

    private fun showButton() {
        button.text = "Apply"
        button.isClickable = true
        button.setBackgroundColor(Color.parseColor("#FF6200EE"))
    }
}

override fun onCreateViewHolder(viewGroup: ViewGroup, i: Int): ViewHolder {
    val v = LayoutInflater.from(viewGroup.context)
        .inflate(R.layout.frame_textview, viewGroup, false)
    return ViewHolder(v)
}

override fun onBindViewHolder(viewHolder: ViewHolder, i: Int) {
    viewHolder.itemName.text = name[i]
    viewHolder.itemDate.text = date[i]
    viewHolder.button.setOnClickListener {
        viewHolder.prefs.edit().putBoolean("registered$i", true).apply()
        btn[i] = true
        viewHolder.hideButton()
    }

}

override fun getItemCount(): Int {
        return name.size
    }
}

class AvailableWorkshops : Fragment() {

override fun onCreateView(
    inflater: LayoutInflater, container: ViewGroup?,
    savedInstanceState: Bundle?
): View? {
    // Inflate the layout for this fragment
    return inflater.inflate(R.layout.fragment_available_workshops, container, false)
}

override fun onViewCreated(itemView: View, savedInstanceState: Bundle?) {
    super.onViewCreated(itemView, savedInstanceState)
    val recyclerView = itemView.findViewById<RecyclerView>(R.id.recycler_view)
    recyclerView.apply {
        // set a LinearLayoutManager to handle Android
        // RecyclerView behavior
        layoutManager = LinearLayoutManager(activity)
        // set the custom adapter to the RecyclerView
        adapter = RecyclerViewAdapter()
        }
    }
}