Quicker way to implement into a list? - list

Question

Im making a list of radio buttons. But cant figure a way to map them. The current method making one by one which is too much and with 10+ radio buttons this is taking up hundreds of lines of code.
enum SingingCharacter {char1, char2, char3, char4}
class _HomeScreenState extends State<HomeScreen> {
SingingCharacter _character = SingingCharacter.char1;
final List myList= ['One','Two','Thre' ];
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Home'),
),
body: Container(
child: Column(children: <Widget>[
RadioListTile<SingingCharacter>(
title: Text('${myList[0]}'),
value: SingingCharacter.char1,
groupValue: _character,
onChanged: (SingingCharacter value) {
setState(() {
_character = value;
});
},
),
RadioListTile<SingingCharacter>(
title: Text('${myList[1]}'),
value: SingingCharacter.char2,
groupValue: _character,
onChanged: (SingingCharacter value) {
setState(() {
_character = value;
});
},
)
....
]),
));
}
}
Any method to loop through this and show in children?
Thanks

Answer 1

You could change your List to a Map and then use this to map your enum values to Widgets. Like this (disclaimer: Code not tested, but something like this should be possible):
enum SingingCharacter {char1, char2, char3}
class _HomeScreenState extends State<HomeScreen> {
SingingCharacter _character = SingingCharacter.char1;
final Map<SingingCharacter, String> radioMap = {SingingCharacter.char1: 'One', SingingCharacter.char2: 'Two', SingingCharacter.char3: 'Three'};
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Home'),
),
body: Container(
child: Column(
children: _generateRadioButtons()
),
)
);
}
List<Widget> _generateRadioButtons() {
return SingingCharacter.values.map((char) {
return RadioListTile<SingingCharacter>(
title: Text('${radioMap[char]}'),
value: char
groupValue: _character,
onChanged: (SingingCharacter value) {
setState(() {
_character = value;
});
},
);
}).toList();
}
}

Answer 2

You can take advantage of the spread operator and unwrap directly a for loop on your Column.
final List myList= ['One','Two','Thre' ];
return Column(children: [
for (int i = 0; i < myList.length; i++)
RadioListTile<SingingCharacter>(
title: Text(myList[i]),
value: SingingCharacter.values[i],
groupValue: _character,
onChanged: (SingingCharacter value) {
setState(() {
_character = value;
});
},
),
]);