如何在ListView中监听滚动？

ScrollController _scrollController = ScrollController();

ListView.builder(
  controller: _scrollController,
  itemCount: items.length,
  itemBuilder: (context, index) {
    return ListTile(title: Text(items[index]));
  },
)

_scrollController.addListener(() {
  if (_scrollController.position.atEdge &&
      _scrollController.position.pixels == 0) {
    // 滚动到顶部时执行的操作
  } else if (_scrollController.position.atEdge &&
      _scrollController.position.pixels ==
          _scrollController.position.maxScrollExtent) {
    // 滚动到底部时执行的操作
  }
});

@override
void dispose() {
  _scrollController.dispose();
  super.dispose();
}