public void setAssociatedListView(AbsListView listView) {
        listView.setOnScrollListener(associatedListViewListener);
        updateListViewScrollState(listView);
    }
Set associated list view, then this layout will only be able to drag down when the list
view is scrolled to top.

@param listView
scrolllayout/src/main/java/com/yinglan/scrolllayout/ScrollLayout.java