Ripple effect over a RecyclerView item containing ImageView

Question

I have a RecyclerView that expands the following grid item :

Answer 1

add below code to your parent layout

android:clickable="true"
android:focusable="true"
android:background="?attr/selectableItemBackground" 

if you want custom ripple effect add this ripple_custom.xml in your drawable-v21

to support older version add ripple_custom.xml in drawable