Code Explanation - MemesAdapter

Replace the below paramaters with your model class

class OnClickListener(val clickListener: (meme: Meme) -> Unit) {
    fun onClick(meme: Meme) = clickListener(meme)
}

We have created a class called OnClickListener that takes in a lambda with one Meme item as a parameter in its Constructor. This class contains a matching function called onClick that will set to the lambda parameter. All this creates a sort of a named lambda

class MemesAdapter(private val onClickListener: OnClickListener) :
    ListAdapter<Meme, MemesAdapter.MyViewHolder>(MyDiffUtil) 

Then we have added an onClickListener property on the Constructor of the MemesAdapter

holder.itemView.setOnClickListener {
            onClickListener.onClick(meme)
}

We finish our work in MemesAdapter by calling our onClickListener inside the itemView's onClickListener in onBindViewHolder with a Meme from the ViewHolder

Code Explanation - MainActivity

adapter = MemesAdapter(MemesAdapter.OnClickListener { photo ->
           Toast.makeText(applicationContext, "${photo.name}", Toast.LENGTH_SHORT).show()
 })

In the MemesAdapter instance, we'll add MemesAdapter OnClickListener object to the MemesAdapter Constructor which returns a passed in Meme from the Adapter. For now we can try and Toast the name of the clicked Meme. On other scenarios one may need to navigate to other activities or fragments and display details of the clicked item.

Demo