layout is not expanding programmatically

[OoredooMobile]

I have a RecyclerView which have dynamic contents, and i have animation for showing the items.
i try to expand the last layout that i have by code, using expandedItems.expand(), expandedItems.toggle(), expandedItems.performClick(), expandedItems.setExpand(true).

but nothing is working, can you please help in this

it only works if i delay the expand until the animation is finished, is there a way to fix it without handling the animation listener?