void main() =>
    runApp(MyApp(
      list: new List<String>.generate(100, (i) => "list $i"),
    ));
class MyApp extends StatelessWidget {
  final List<String> list;
  MyApp({@required this.list}) :super()
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        title: 'Flutter',
        theme: ThemeData(
          primarySwatch: Colors.blue,
        ),
        home: Scaffold(
            appBar: AppBar(
              title: Text("Hell Word"),
            ),
            body: new ListView.builder(
              itemCount: list.length,
              itemBuilder: (context, position) {
                return new ListTile(
                  title: Text("list  ${list[position]}"),
                );
              },
            )));
  }
}