I created a recycler view and feed data to it from MyAdapter class, I wanted to get name in recyler view item when it's clicked, On a youtube video I learnt how to get index of item (when clicked). I created an araryList of containing all the names in MyAdapter class, so I can access them it in MainAcitivty class by making a function to return needed arrayList value using index

public fun getName(pos: Int) : String {
        return nameList[pos]
    }

Now when I tried to call this function on MainActivity class and it shows an error (Unresolved reference: getName)

var name = MyAdapter.getName(position)

I did some searching and couldn't find a solution for this, Can someone help me with properly calling a function in another class (in Kotlin) or a better way to do the same thing and sorry I'm new to Kotlin, Thank you!

CodePudding user response：

in your code getName function is not static So you must get the name like this :

var name = (recyclerView.adapter as MyAdapter).getName(position)

But another way and correct way is to use the callback :

class MyAdapter(val onItemClick: (item: ItemModel?) -> Unit): 
    RecyclerView.Adapter<YourViewHolder>{
        override fun onBindViewHolder(holder: YourViewHolder, position: Int) {
            holder.binding.btn.setOnClickListener {
                onItemClick.invoke(yourList[position])
            }
         }
     }

Then in your activity or fragment listen to the callback

MyAdapter(){ item ->
}