class RadioDemo extends StatefulWidget {
@override
_RadioDemoState createState() => _RadioDemoState();
}
class _RadioDemoState extends State<RadioDemo> {
int _radioGroupA = 0;
void _handleRadioValueChanged(int value){
setState(() {
_radioGroupA = value;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('checkboxDemo'),
elevation: 0,
),
body: Container(
padding: EdgeInsets.all(16),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Radio(
value: 0,
groupValue: _radioGroupA,
onChanged: _handleRadioValueChanged,
activeColor: Colors.blueAccent,
),
Radio(
value: 1,
groupValue: _radioGroupA,
onChanged: _handleRadioValueChanged,
activeColor: Colors.blueAccent,
),
],
)
],
),
),
);
}
}

预览
class RadioDemo extends StatefulWidget {
@override
_RadioDemoState createState() => _RadioDemoState();
}
class _RadioDemoState extends State<RadioDemo> {
int _radioGroupA = 0;
void _handleRadioValueChanged(int value){
setState(() {
_radioGroupA = value;
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('checkboxDemo'),
elevation: 0,
),
body: Container(
padding: EdgeInsets.all(16),
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
RadioListTile(
value: 0,
groupValue: _radioGroupA,
onChanged: _handleRadioValueChanged,
title: Text('Option A'),
subtitle: Text('Description'),
secondary: Icon(Icons.filter_1),
selected: _radioGroupA == 0,
),
RadioListTile(
value: 1,
groupValue: _radioGroupA,
onChanged: _handleRadioValueChanged,
title: Text('Option B'),
subtitle: Text('Description'),
secondary: Icon(Icons.filter_2),
selected: _radioGroupA == 1,
),
],
),
),
);
}
}

预览
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