How can the RecyclerView adapter talk back to parent layout?

Issue

I got a parent layout, activity_main.xml, with multiple views inside it, one of which is the RecyclerView view.

Within the recycler view, there are buttons that, once the user deals with them, I would like things to happen in the parent layout that is activity_main.xml.

For example, if I press a button on a ViewHolder item inside the child RecyclerView, in some cases, I would like changes to happen in the parent activity_main.xml layout.

However, my problem is that I don't know how to allow for this communication to happen.

What might be the best practices for such cases?

Solution

You need to create an interface callback or use a higher-order function.

This Stack Overflow answer is an example of an interface callback: How to access component of MainActivity in recycler view to make onclick listener?.

Kotlin Lambda Functions For RecyclerView Adapter Callbacks in Android is for higher-order functions.

Answered By - Ashutosh Ojha