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home: SampleAppPage(),
);
}
}
class SampleAppPage extends StatefulWidget {
const SampleAppPage({super.key});
@override
State<SampleAppPage> createState() => _SampleAppPageState();
}
class _SampleAppPageState extends State<SampleAppPage> {
List<Widget> widgets = <widget>[];
@override
void initState() {
super.initState();
for (int i = 0; i < 100; i++) {
widgets.add(getRow(i));
}
}
widget getRow(int i) {
return GestureDetector(
onTap: () {
setState(() {
widgets = list.from(widgets);
widgets.add(getRow(widgets.length));
developer.log('row $i');
});
},
child: padding(
padding: const EdgeInsets.all(10),
child: Text('Row $i'),
),
);
}
@override
widget build(BuildContext context) {
return scaffold(
appBar: AppBar(
title: const Text('Sample app'),
),
body: ListView(children: widgets),
);
}
}
<code_end>
the recommended, efficient,
and effective way to build a list uses a ListView.Builder.
this method is great when you have a dynamic
list or a list with very large amounts of data.
<code_start>
import 'dart:developer' as developer;
import 'package:flutter/material.dart';
void main() {
runApp(const SampleApp());
}
class SampleApp extends StatelessWidget {
const SampleApp({super.key});
// this widget is the root of your application.
@override
widget build(BuildContext context) {
return const MaterialApp(
title: 'sample app',
home: SampleAppPage(),
);
}
}
class SampleAppPage extends StatefulWidget {
const SampleAppPage({super.key});
@override
State<SampleAppPage> createState() => _SampleAppPageState();
}
class _SampleAppPageState extends State<SampleAppPage> {
List<Widget> widgets = [];
@override
void initState() {
super.initState();
for (int i = 0; i < 100; i++) {
widgets.add(getRow(i));
}
}
widget getRow(int i) {
return GestureDetector(
onTap: () {
setState(() {
widgets.add(getRow(widgets.length));
developer.log('row $i');
});
},
child: padding(
padding: const EdgeInsets.all(10),
child: Text('Row $i'),
),
);
}
@override
widget build(BuildContext context) {
return scaffold(
appBar: AppBar(
title: const Text('Sample app'),
),
body: ListView.builder(