Resetting Radio List in Flutter - flutter

Question

I am still a novice with flutter and I am working on a quiz app right now
In the radio button list whenever the app goes to next question the radio buttons are not getting reset and I will be grateful if someone can guide me on how I can reset radio button on calling next question function
Pseudocode
class _QuizPageState extends State<QuizPage> {
List<dynamic> myQuestion;
_QuizPageState(this.myQuestion);
int i = 0;
int count = 0;
int selectedRadioTile;
int marks = 0;
var selected;
Widget choiceButton(String k, int value) {
return Padding(
padding: EdgeInsets.symmetric(
vertical: 10,
),
child: RadioListTile(
value: value,
groupValue: selectedRadioTile,
title: Container(
child: Text(myQuestion[i][k] ?? "None"),
),
onChanged: (val) {
setSelectedRadioTile(val);
selected = val;
},
activeColor: Colors.green,
selected: true,
),
);
}
void initState() {
selectedRadioTile = 0;
super.initState();
}
setSelectedRadioTile(int val) {
setState(() {
selectedRadioTile = val;
});
}
void checkAnswer() {
var e = int.parse(myQuestion[i]["Answer"]);
if (e == selected) {
marks = marks + 1;
} else {
print("wrong");
}
nextquestion();
}
void nextquestion() {
setState(() {
if (count < 9) {
i = randomBetween(0, myQuestion.length);
} else {
Navigator.of(context).pushReplacement(MaterialPageRoute(
builder: (context) => resultpage(marks: marks),
));
}
});
}
#override
Widget build(BuildContext context) {
return WillPopScope(
onWillPop: () {
return showDialog(
context: context,
builder: (context) => AlertDialog(
title: Text(
"Alert",
),
content: Text("You Can't Go Back At This Stage."),
actions: <Widget>[
FlatButton(
onPressed: () {
Navigator.of(context).pop();
},
child: Text(
'Ok',
),
)
],
));
},
child: Scaffold(
appBar: AppBar(
elevation: 30.0,
title: Center(
child: Text(
'Quiz',
style: TextStyle(
color: Colors.white,
fontSize: 20.0,
fontFamily: "Quando",
fontWeight: FontWeight.bold,
),
),
),
backgroundColor: Colors.amber[800],
),
body: LayoutBuilder(
builder: (context, constraint) {
return SingleChildScrollView(
child: ConstrainedBox(
constraints: BoxConstraints(minHeight: constraint.maxHeight),
child: IntrinsicHeight(
child: Column(
children: <Widget>[
Expanded(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Center(
child: Container(
padding: EdgeInsets.only(top: 20, left: 10),
child: Text(
myQuestion[i]["Question"] ?? "None",
style: TextStyle(
fontSize: 15.0,
fontFamily: "Quando",
fontWeight: FontWeight.bold,
),
),
),
),
SizedBox(
height: 20,
),
Expanded(
child: AspectRatio(
aspectRatio: 16 / 11,
child: ClipRect(
child: SizedBox(
height: 50,
child: PhotoView(
imageProvider: AssetImage(
myQuestion[i]["Image"] ?? "None"),
minScale:
PhotoViewComputedScale.contained *
0.5,
maxScale:
PhotoViewComputedScale.covered * 2,
initialScale: 0.6,
backgroundDecoration: BoxDecoration(
color: Theme.of(context).canvasColor,
),
),
),
),
),
),
Text(
"To adjust the image double Tap",
style: TextStyle(
fontFamily: "Quando",
color: Colors.black26,
fontSize: 15.0,
fontWeight: FontWeight.bold,
),
),
],
),
),
SizedBox(
height: 10,
),
Expanded(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
mainAxisSize: MainAxisSize.min,
children: <Widget>[
choiceButton("option1", 1),
choiceButton("option2", 2),
choiceButton("option3", 3),
choiceButton("option4", 4),
],
),
),
Expanded(
flex: 0,
child: RaisedButton(
splashColor: Colors.blueAccent,
color: Colors.blueAccent,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(50.0),
),
onPressed: () {
checkAnswer();
count = count + 1;
showDialog(
context: context,
builder: (context) => AlertDialog(
title: Text(
"Explaination",
),
content: Text(
myQuestion[i]["Explanation"] ?? "None",
style: TextStyle(
fontSize: 15.0,
fontFamily: "Quando",
),
),
actions: <Widget>[
FlatButton(
onPressed: () {
Navigator.of(context).pop();
},
child: Text(
'Ok',
),
)
],
));
},
child: Text(
'Submit',
),
),
),
SizedBox(
height: 40,
)
],
),
),
),
);
},
),
),
);
}
}

Answer 1

You could just set selectedRadioTile to 0 in nextQuestion:
void nextquestion() {
setState(() {
selectedRadioTile = 0;
if (count < 9) {
i = randomBetween(0, myQuestion.length);
} else {
Navigator.of(context).pushReplacement(MaterialPageRoute(
builder: (context) => resultpage(marks: marks),
));
}
});
}