Flutter:如何以编程方式和周期性(从流)滚动？

import 'package:flutter/material.dart';

class MyListView extends StatefulWidget {
  @override
  _MyListViewState createState() => _MyListViewState();
}

class _MyListViewState extends State<MyListView> {
  ScrollController _controller = ScrollController();

  @override
  void initState() {
    super.initState();
    // 在初始化时滚动到指定位置
    _controller.animateTo(
      200.0,
      duration: Duration(seconds: 1),
      curve: Curves.ease,
    );
  }

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      controller: _controller,
      itemCount: 100,
      itemBuilder: (context, index) {
        return ListTile(
          title: Text('Item $index'),
        );
      },
    );
  }
}

import 'package:flutter/material.dart';

class MyListView extends StatefulWidget {
  @override
  _MyListViewState createState() => _MyListViewState();
}

class _MyListViewState extends State<MyListView> {
  ScrollController _controller = ScrollController();
  Timer _timer;
  double _scrollOffset = 0.0;

  @override
  void initState() {
    super.initState();
    // 每隔1秒滚动一次
    _timer = Timer.periodic(Duration(seconds: 1), (timer) {
      _scrollOffset += 100.0;
      _controller.animateTo(
        _scrollOffset,
        duration: Duration(seconds: 1),
        curve: Curves.ease,
      );
    });
  }

  @override
  void dispose() {
    _timer.cancel();
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
      controller: _controller,
      itemCount: 100,
      itemBuilder: (context, index) {
        return ListTile(
          title: Text('Item $index'),
        );
      },
    );
  }
}