当用户滚动时，如何从“滑动显示” RecyclerView菜单项中隐藏底部布局？

Question

I am using this class (there is a lot of code, so I won't post it here) to implement Swipe-to-reveal action, and when user swipes from right to left on any CardView item in RecyclerView, bottom layout is shown with some buttons. When user swipes from left to right, bottom layout is hidden:

Everything works great, but I want to achieve effect which allow users to automatically hide bottom layout with extra buttons when they scroll. There are methods named open() and close() in the class above, and I am trying to call them in onDown() method:

 mDragHelper.smoothSlideViewTo(mMainView, mRectMainClose.left, mRectMainClose.top);

but I'm getting this error:

• Attempt to invoke virtual method 'int android.view.View.getLeft()' on a null object reference

Answer 1

Found this very awesome library named SwipeRevealLayout from chthai64.

Maybe someone will find this useful, I did!