Scrolling Issue

[SatvirGsBitlabs]

Hi
I am developing app in which I am having a view similar to Instagram
(https://user-images.githubusercontent.com/35765225/35329279-4444b0ee-00f7-11e8-8408-95c6d0bfb04d.jpeg)
I want a scrolling effect similar to instagram.
When it is scrolled up its working perfectly fine,the above view is auto-collapsing.
But when i am clicking on any item in recyclerview I want the above auto collapsed view should expand that i achieved from
appbar.setExpanded(true)
But when it is expanding it is scrolling the recyclerview also.I don't want the recyclerview to scroll with it.The clicked item should be on top like instagram.
Please Help.