How do I add SingleChildScrollView to a column - dart

Question

I'm developing an app and was following a sample from this link and ran into a problem where it says bottom overflowed by xx pixels as shown below:
Now, I encountered this before and solved it by adding SingleChildScrollView as shown below:
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Academy',
theme: new ThemeData(
primaryColor: Color.fromRGBO(58, 66, 86, 1.0)
),
debugShowCheckedModeBanner: false,
home: Scaffold(
body: new Container(
child: SingleChildScrollView(
child: LoginScreen(),
)
),
),
);
}
How do I do it when I'm not using a container but a column instead ? As that is what I'm using in the image above (column at the bottom of code, where the author returns the scaffold):
class DetailPage extends StatelessWidget {
final Lesson lesson;
DetailPage({Key key, this.lesson}) : super(key: key);
#override
Widget build(BuildContext context) {
final levelIndicator = Container(
child: Container(
child: LinearProgressIndicator(
backgroundColor: Color.fromRGBO(209, 224, 224, 0.2),
value: lesson.indicatorValue,
valueColor: AlwaysStoppedAnimation(Colors.green)),
),
);
final coursePrice = Container(
padding: const EdgeInsets.all(7.0),
decoration: new BoxDecoration(
border: new Border.all(color: Colors.white),
borderRadius: BorderRadius.circular(5.0)),
child: new Text(
"\$" + lesson.price.toString(),
style: TextStyle(color: Colors.white),
),
);
final topContentText = Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: <Widget>[
SizedBox(height: 120.0),
Icon(
Icons.directions_car,
color: Colors.white,
size: 40.0,
),
Container(
width: 90.0,
child: new Divider(color: Colors.green),
),
SizedBox(height: 10.0),
Text(
lesson.title,
style: TextStyle(color: Colors.white, fontSize: 45.0),
),
SizedBox(height: 30.0),
Row(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
Expanded(flex: 1, child: levelIndicator),
Expanded(
flex: 6,
child: Padding(
padding: EdgeInsets.only(left: 10.0),
child: Text(
lesson.level,
style: TextStyle(color: Colors.white),
))),
Expanded(flex: 1, child: coursePrice)
],
),
],
);
final topContent = Stack(
children: <Widget>[
Container(
padding: EdgeInsets.only(left: 10.0),
height: MediaQuery.of(context).size.height * 0.5,
decoration: new BoxDecoration(
image: new DecorationImage(
image: new AssetImage("assets/images/drones1.jpg"),
fit: BoxFit.cover,
),
)),
Container(
height: MediaQuery.of(context).size.height * 0.5,
padding: EdgeInsets.all(40.0),
width: MediaQuery.of(context).size.width,
decoration: BoxDecoration(color: Color.fromRGBO(58, 66, 86, .9)),
child: Center(
child: topContentText,
),
),
Positioned(
left: 8.0,
top: 60.0,
child: InkWell(
onTap: () {
Navigator.pop(context);
},
child: Icon(Icons.arrow_back, color: Colors.white),
),
)
],
);
final bottomContentText = Text(
lesson.content,
style: TextStyle(fontSize: 18.0),
);
final readButton = Container(
padding: EdgeInsets.symmetric(vertical: 16.0),
width: MediaQuery.of(context).size.width,
child: RaisedButton(
onPressed: () => {},
color: Color.fromRGBO(58, 66, 86, 1.0),
child:
Text("TAKE THIS LESSON", style: TextStyle(color: Colors.white)),
));
final bottomContent = Container(
width: MediaQuery.of(context).size.width,
padding: EdgeInsets.all(40.0),
child: Center(
child: Column(
children: <Widget>[bottomContentText, readButton],
),
),
);
return Scaffold(
body: Column( //here is the column
children: <Widget>[topContent, bottomContent],
),
);
}
}
I tried these but it does not work, giving me the same result as before:
return Scaffold(
body: Container(child: SingleChildScrollView(child:Column(children: <Widget>[topContent, bottomContent],),),),
);
return Scaffold(
body: Column(
children: <Widget>[Expanded(child: Column(children: <Widget>[topContent, bottomContent],))],
),
);
return Scaffold(
body: SingleChildScrollView(child: Container(child:Column(children: <Widget>[topContent, bottomContent],),),),
);
My outcome when I tried this as suggested:
return Scaffold(
body: Column( //here is the column
children: <Widget>[Expanded(child: SingleChildScrollView(child: Text("Test"))), Text("Data")],
),
);

Answer 1

I solved it by adding the SingleChildScrollView to the following in topContent:
Container(
height: MediaQuery.of(context).size.height * 0.5,
padding: EdgeInsets.all(40.0),
width: MediaQuery.of(context).size.width,
decoration: BoxDecoration(color: Color.fromRGBO(58, 66, 86, .9)),
child: SingleChildScrollView(
child: Center(
child: topContentText,
),
),
),