How can I prevent notifyItemChanged() from killing the ripple effect when selecting an item in a RecyclerView?

Question

I have a RecyclerView and I would like to allow users to select views using a long press. This works fine except that the ripple effect is terminated as soon as I call either notifyItemChanged() or notifyDataSetChanged in order to indicate the selection. How can I prevent this from happening?

Note, this question has been asked before (Example 1, Example 2). The answer to those questions has been to use notifyItemChanged instead of notifyDataSetChanged. I have tried both of these and it does not change the behavior for me.

I am using drawable as background so you dont need to notify any change just checkout my question : [RecyclerView](http://stackoverflow.com/questions/38862718/binary-xml-file-line-error-inflating-class-unknown) Find state.xml and try to do something like that — Yasin Kaçmaz, Sep 14 '16 at 21:40
That would be a good option if just a background color was acceptable but I really want to make more active changes to the view. — Donatella Tarrio, Sep 14 '16 at 22:08
I have a custom view inside that handles changing a border size and displays a different image. — Donatella Tarrio, Sep 14 '16 at 22:22
Override onSelected in custom View. If selected, change bordersize etc and invalidate. — Fletcher Johns, Sep 14 '16 at 23:25

score 1 · Answer 1 · answered Sep 13 '18 at 09:18

There are two versions of notifyItemChanged() method. One takes only position and the other one takes position and a payload.

And in my case the first one broke the ripple effect, while the second one worked. At least when I passed the object that just has been changed as the payload.

score 0 · Answer 2 · answered Aug 11 '21 at 12:19

0

a) add DiffUtilCallback to your adapter

b) make sure what your areItemsTheSame method compare items by id and not by content. Because if it compare by content, it thinks what you remove previous cell and insert new, and kill ripple effect.

answered Aug 11 '21 at 12:19

John

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How can I prevent notifyItemChanged() from killing the ripple effect when selecting an item in a RecyclerView?

2 Answers2