Flutter - Checkbox animation doesn't show - flutter

Question

The value is effectively changing when clicking but the animation doesn't show :
Here's my code :
var editGender = Padding(
padding: const EdgeInsets.only(top: 12.0),
child: Column(
children: <Widget>[
CheckboxListTile(
value: _male,
onChanged: _maleChanged,
title: Text("Male"),
activeColor: Theme.of(context).primaryColor,
),
CheckboxListTile(
value: _female,
onChanged: _femaleChanged,
title: Text("Female"),
activeColor: Theme.of(context).primaryColor,
)
],
),
);
When tapping the edit button :
FlatButton(
onPressed: (){
buildShowRoundedModalBottomSheet(context, title, editGender, option);
},
child: Text('Edit'),
it shows the bottom sheet :
Future buildShowRoundedModalBottomSheet(BuildContext context, String title, Widget content,[String date]) {
return showRoundedModalBottomSheet(
context: context,
radius: 20.0,
builder: (context){
return Padding(
padding: const EdgeInsets.only(top: 20.0, bottom: 20.0, left: 20.0, right: 20.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Text(
title,
style: TextStyle(
fontFamily: 'SamsungSans',
fontSize: 20.0,
),
),
content,
...
I am passing the same context to the widget :/

Answer 1

setState would change the value but it wouldn't rebuild your bottom sheet as it is being called on a onPressed of a FlatButton. You are certainly not invoking that onPressed again but you wouldn't want to do it either.
As I mentioned in the comments a StatefulBuilder would do the job.
A working example
import 'package:flutter/material.dart';
import 'package:rounded_modal/rounded_modal.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
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 _counter = 0;
bool value = false;
void _incrementCounter() {
showRoundedModalBottomSheet(
context: context,
builder: (context) {
return StatefulBuilder(builder: (context, setState) {
return Container(
height: 200.0,
child: Checkbox(value: value, onChanged: (val) {
setState(() {
value = val;
});
}),
);
});
});
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
Text(
'$_counter',
style: Theme.of(context).textTheme.display1,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
}
}

Answer 2

As commented by #10101010, you'll have to use a Stateful widget. And In _femaleChanged and _maleChanged, you'll have to use setState(). Example :
void _femaleChanged(bool value) => setState(() => _female = value);