@Override
    protected void onScrollChanged(int l, int t, int oldl, int oldt) {
        super.onScrollChanged(l, t, oldl, oldt);

        if (mOnScrollChangeListener != null) {
            mOnScrollChangeListener.onScrollChange(this, l, t, oldl, oldt);
        }
    }
Set whether arrow scrolling will animate its transition.
@param smoothScrollingEnabled whether arrow scrolling will animate its transition
app/src/main/java/home/smart/fly/animations/widget/NestedScrollView.java