move singlechildscroll view back to top position after refresh in flutter - flutter

Question

whenever I tap on any of the options of the given 4 buttons, my new data loads in the text and in the 4 option fields.
but the scroll view doesn't come back to its normal position, instead, it remains down, at what position I had left it, previously.
so how to get singlechildscrollview back to its original form after every refresh?
Expanded(
child: Container(
width: MediaQuery.of(context).size.width,
margin:EdgeInsets.only(top: 50.0,bottom: 50) ,
decoration: BoxDecoration(
color: Color(0xFFf2f2f2),
borderRadius: BorderRadius.only(topRight: Radius.circular(40),topLeft:Radius.circular(40) ),
),
child: SingleChildScrollView(
scrollDirection: Axis.vertical,
child: Container(
height: 800,
child: (
Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: [
Padding(
padding: const EdgeInsets.only(top: 50,left: 20,right: 20),
child: Text(question.replaceAll("\\n", "\n"),style: TextStyle(fontWeight: FontWeight.bold,fontSize: 18),),
),
SizedBox(height: 20),
optionButton(text: option1),
SizedBox(height: 30),
optionButton(text: option2),
SizedBox(height: 30),
optionButton(text: option1),
SizedBox(height: 30),
optionButton(text: option2),
SizedBox(height: 30),
Spacer(),
Column(
children: [
Text("TOTAL"),
Container(
width: MediaQuery. of(context). size. width,
color: Colors.blue,
child:
Center(child: Text(score.toString(),)),),
SizedBox(height: 20)
],),
],
)
),
),
),
),
),

Answer 1

Since I'm not sure what optionButton looks like, you'll probably need this first above your build method:
ScrollController scrollController = new ScrollController();
Then if your optionButton is within the same class, call this within your button function onTap(){} or onPressed(){} :
scrollController.jumpTo(0.0);
Make sure to add the controller to SingleChildScrollView
If optionButton is from a different class, then I'll have to change my answer.
Let me know if this helps!