Ripple effect over a RecyclerView item containing ImageView

Question

I have a RecyclerView that expands the following grid item :

Answer 1

If you have a CardView + ImageView
just insert in CardView

android:focusable="true"
android:foreground="?android:attr/selectableItemBackground"

And for RelativeLayout + ImageView
Insert in RelativeLayout

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

Or

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

This codes worked for me