RecyclerView Adapter example.

SampleAdapter.kt

class SampleAdapter : RecyclerView.Adapter<SampleAdapter.ViewHolder>() {
    private var list: List<Sample> = listOf()

    override fun getItemCount(): Int = list.size

    override fun onBindViewHolder(holder: SampleAdapter.ViewHolder, position: Int) {
        holder.bind(list[position])
    }

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): SampleAdapter.ViewHolder {
        val view = LayoutInflater.from(parent.context).inflate(R.layout.recycler_view_item, parent, false)
        return SampleAdapter.ViewHolder(view)
    }

    fun setSamples(categories: List<Sample>) {
        list = Samples
        notifyDataSetChanged()
    }

    class ViewHolder(itemView: View): RecyclerView.ViewHolder(itemView) {
        var textview: TextView = itemView.findViewById(R.id.textview)
        
        fun bind(sample: Sample) {
            textview.text = Sample.sometext
        }
    }
}