android swipRefreshLayout 갱신 하기 + listview Scroll

listView = (ListView) findViewById(R.id.listView);
listView.setOnScrollListener(new AbsListView.OnScrollListener() {
    @Override
     public void onScrollStateChanged(AbsListView view, int scrollState) {

    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
        if (listView.getChildAt(0) != null) {
        swipeRefreshLayout.setEnabled(listView.getFirstVisiblePosition() == 0 && listView.getChildAt(0).getTop() == 0);
        }
    }
});