Pager-like behavior in RecyclerView

Question

I am trying to implement a ViewPager-like behavior for a horizontal RecyclerView. The data from the adapter should inflate and bind as normal, but the navigation through the Recycler should be handled differently. When the user swipes (or attempts to scroll), I move the Recycler one item in that direction, sticking it to the left side.

I already have all the item transition logic. I am using a custom LayoutManager, which overrides onSmoothScrollToPosition() with a custom LinearSmoothScroller() which does the item to-the-left sticking.

The question is - how can I override the scrolling behavior of the RecyclerView to intercept the swipes and handle them myself? I tried disabling scrolling in the LayoutManager and then intercepting the gesture in an onTouchListener, but this does not seem to work. Does the RecyclerView framework have a clean way to handle this?

Answer 1

The native Android solution covered in this post was a super easy way to get the RecyclerView to behave like a ViewPager.

Relevant bits:

The 24.2.0 version of the support library introduced two new classes (SnapHelper and LinearSnapHelper) that should be used to handle snapping in a RecyclerView. .... The only code needed is:

SnapHelper snapHelper = new LinearSnapHelper(); snapHelper.attachToRecyclerView(recyclerView);

SnapHelper snapHelper = new GravitySnapHelper(Gravity.START); snapHelper.attachToRecyclerView(startRecyclerView);

Answer 2

there is a library layoutmanagers exactly for this.

the one that you need is ViewPagerLayoutManager. It is based on the same idea you already have but more extended and handles multiple cases. It basically scrolls until there is a change of page & state then takes over and adjust to the right page.

To use it you just need to set it as a normal Layout manager:

recyclerView.setLayoutManager(new ViewPagerLayoutManager(getActivity()));

for more info and examples check here