My app have a viewpager and 4 tabs, each tab have many fragment. But I just want my Toolbar scroll up/down while scrolling recyclerview in 2 specific tabs. But I don't know how to block Toolbar scroll for other tabs. I tried to import toolbar for each fragment but it seems I can't do it.
Anyone have idea to solve this problem?
I'd strongly recommend against changing the scrolling flags based on what tab is selected - having the Toolbar automatically return (and the content move down) when scrolling to a non-recyclerview tab can be very jarring and probably not an interaction pattern you want (exasperated if your two
RecyclerView tabs are next to one another).
However, if you want to see it in person, you can use setScrollFlags() to set the scroll flags programmatically:
Toolbar toolbar = ... // your toolbar within an AppBarLayout AppBarLayout.LayoutParams params = (AppBarLayout.LayoutParams) toolbar.getLayoutParams(); params.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_ENTER_ALWAYS);