//回滚到顶部
    public void scrollToTop() {
        if (null != adapter && adapter.getCount() > 0 && null != listView) {
            //强制停止ListView滚动
            listView.dispatchTouchEvent(MotionEvent.obtain(SystemClock.uptimeMillis(), SystemClock.uptimeMillis(), MotionEvent.ACTION_CANCEL, 0, 0, 0));

            //如果item过多，则先停在某一项上
            if (listView.getFirstVisiblePosition() > 8)
                listView.setSelection(8);

            //延迟一段时间后回滚
            new Handler().postDelayed(() -> {
                        int h = -(listView.getFirstVisiblePosition() + 1) * Constants.screenHeight;
                        listView.smoothScrollBy(h, 1500);

                    },100);

            //延迟显示topbar
            new Handler().postDelayed(() -> {
                if (!isTopbarShow) {
                    animTopbar(true);
                    isTopbarShow = true;
                }
            }, 300);
        }
    }