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ListView.dart
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ListView.dart
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import 'package:english_words/english_words.dart';
import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Hello Flutter',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
debugShowCheckedModeBanner: false,
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
static const loadingTag = "@@@END@@@";
var _words = <String>[loadingTag];
var _divider = Divider(color: Colors.amber, thickness: 5,);
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text("ListView"),
leading: Icon(FontAwesomeIcons.dragon),
),
body: ListView.separated(
itemBuilder: (context, index) {
if (_words[index] == loadingTag) {
_retrieveData();
return Container(
alignment: Alignment.center,
child: CircularProgressIndicator());
} else {
return ListTile(
title: Text(_words[index]),
);
}
},
separatorBuilder: (context, index) => _divider,
itemCount: _words.length));
}
void _retrieveData() {
Future.delayed(Duration(seconds: 2)).then((e) {
setState(() {
_words.insertAll(
_words.length - 1,
generateWordPairs().take(20).map((e) => e.asPascalCase).toList());
});
});
}
}