@Override
public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
super.onLayoutChildren(recycler, state);
if (dataChangedListener != null) {
dataChangedListener.onDataChanged();
}
}
@Override
public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State state) {
super.onLayoutChildren(recycler, state);
cacheHeaderPositions();
positioner.reset(getOrientation(), findFirstVisibleItemPosition());
positioner.updateHeaderState(
findFirstVisibleItemPosition(), getVisibleHeaders(), viewRetriever.setRecycler(recycler));
}