Example of Clean RecyclerViewAdapter with DiffUtil

CleanRecyclerViewAdapter.kt

class YourAdapter : ListAdapter<YourData, YourAdapter.ViewHolder>(YourDataDiffCallback()) {

    override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
        return ViewHolder.from(parent)
    }

    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
        val item = getItem(position)
        holder.bind(item)
    }


    class ViewHolder private constructor(itemView: View) : RecyclerView.ViewHolder(itemView) {
        val tv1: TextView = itemView.findViewById(R.id.tv_1)
        val tv2: TextView = itemView.findViewById(R.id.tv_2)
        val img1: ImageView = itemView.findViewById(R.id.img_1)

        fun bind(item: YourData) {
            val res = itemView.context.resources
            tv1.text = "value1"
            tv2.text = "value2"
            img1.setImageResource(R.drawable.icon1) 
        }

        companion object {
            fun from(parent: ViewGroup): ViewHolder {
                val layoutInflater = LayoutInflater.from(parent.context)
                val view = layoutInflater.inflate(R.layout.list_item_, parent, false)

                return ViewHolder(view)
            }
        }
    }

    class YourDataDiffCallback : DiffUtil.ItemCallback<YourData>() {
        override fun areItemsTheSame(oldItem: YourData, newItem: YourData): Boolean {
            return oldItem.uniqueId == newItem.uniqueId
        }

        override fun areContentsTheSame(oldItem: YourData, newItem: YourData): Boolean {
            return oldItem == newItem
        }

    }


}