If you want to extend PageView to both sides with builder? Use PageController’s initialPage property. Setting it to an absurdly big value. And then use this value as your “index 0”.
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class MyHomePage extends StatelessWidget { final PageController pageController = new PageController(initialPage: 4242); @override Widget build(BuildContext context) { return new Scaffold(body: new PageView.builder( controller: pageController, itemBuilder: (context, _index) { final index = _index - 4242; return new Container( margin: const EdgeInsets.all(9.0), color: Colors.red, child: new Center( child: new Text(index.toString()), ), ); }, )); } } |
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