Here is a working code with ```StatefulBuilder```:
```
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
int number = 0;
StateSetter _setModalState;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Material(
child: Center(
child: FlatButton(
color: Colors.green,
child: Padding(
padding: EdgeInsets.all(12),
child: Text('press me'),
),
onPressed: () {
showDialog(
context: context,
builder: (BuildContext context) {
return StatefulBuilder(builder:
(BuildContext context, StateSetter setModalState) {
this._setModalState = setModalState;
return AlertDialog(
content: Wrap(
children: [
Column(
children: [
Center(
child: Text(number.toString()),
),
SizedBox(
height: 100,
),
FlatButton(
color: Colors.red,
onPressed: () {
_setModalState(() {
number++;
});
},
child: (Text("++")),
)
],
),
],
),
);
});
},
barrierDismissible: false,
);
},
),
),
));
}
}
```
You can add `Container` and `ListView` in `Column`.
```dart
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatefulWidget {
@override
_MyAppState createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
@override
void initState() {
// TODO: implement initState
super.initState();
}
@override
Widget build(BuildContext context) {
return MaterialApp(
debugShowCheckedModeBanner: false,
home: Scaffold(
appBar: AppBar(
title: Text("Demo App1"),
),
body: Column(
children: <Widget>[
Container(
height: 40.0,
child: Row(
children: <Widget>[
Container(
padding: EdgeInsets.all(4.0),
width: 100.0,
child: Text(
"Name",
style: TextStyle(fontSize: 18),
)),
Container(
padding: EdgeInsets.all(4.0),
width: 100.0,
child: Text(
"Age",
style: TextStyle(fontSize: 18),
)),
],
),
),
Expanded(
child: ListView.builder(
itemCount: 100,
itemBuilder: (BuildContext context, int index) {
return Row(
children: <Widget>[
Container(
padding: EdgeInsets.all(4.0),
width: 100.0,
child: Text(
"Name $index",
style: TextStyle(fontSize: 18),
)),
Container(
padding: EdgeInsets.all(4.0),
width: 100.0,
child: Text(
"Age $index",
style: TextStyle(fontSize: 18),
),
)
],
);
},
),
),
],
),
),
);
}
}
```
