onDetachedFromWindow
Called when this LayoutManager is detached from its parent RecyclerView or when its parent RecyclerView is detached from its window.
LayoutManager should clear all of its View references as another LayoutManager might be assigned to the RecyclerView.
If the RecyclerView is re-attached with the same LayoutManager and Adapter, it may not call onLayoutChildren if nothing has changed and a layout was not requested on the RecyclerView while it was detached.
If your LayoutManager has View references that it cleans in on-detach, it should also call requestLayout to ensure that it is re-laid out when RecyclerView is re-attached.
Subclass implementations should always call through to the superclass implementation.
Parameters
The RecyclerView this LayoutManager is bound to
The recycler to use if you prefer to recycle your children instead of keeping them around.
See also
Deprecated
override onDetachedFromWindow