How do i arrange the widget Icon into right side always - flutter

Question

Hello I am new on flutter and I am currently working on a design which I saw but the problem is that I am having issue on putting the Icon on the right side and the Row is not same size as others. I hope you can help me so it will broaden my knowledge on this flutter. I just started Flutter this week.
Design intended :
Current work :
Code :
#override
Widget build(BuildContext context) {
// TODO: implement build
Widget titleText = Container(
padding: const EdgeInsets.all(32),
child: Center(
child: Text('Select Screen Lock',style: TextStyle(fontSize: 32.0,fontWeight: FontWeight.bold),),
)
);
Widget subTitleText = Container(
padding: const EdgeInsets.all(32),
child: Center(
child: Text('Secure your phone with a screen lock style,',style: TextStyle(fontSize: 16,fontWeight: FontWeight.normal),),
),
);
Widget selectionContainer = Container(
width: 200,
child: IntrinsicWidth(
child: Column(
children: <Widget>[
_selectMenu('Password'),
_selectMenu('Pin Code'),
_selectMenu('Finger Print')
],
),
)
);
return MaterialApp(
home: Scaffold(
body: ListView(
children: <Widget>[
titleText,
subTitleText,
Center(
child:
selectionContainer,
)
],
),
),
);
}
Column _selectMenu(String title){
return Column(
children: <Widget>[
Row(
children: <Widget>[
Text(title), Icon(
Icons.arrow_forward_ios,
color: Colors.grey,
size: 16,
)
],
)
],
);
}

Answer 1

Problem here:
Column _selectMenu(String title){
return Column(
children: <Widget>[
Row(
children: <Widget>[
Text(title), Icon(
Icons.arrow_forward_ios,
color: Colors.grey,
size: 16,
)
],
)
],
);
First of all, remove Column(why we need it here?), and add space between items(please check mainAxisAlignment and crossAxisAlignment), then we get
Widget _selectMenu(String title){
return Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: <Widget>[
Text(title), Icon(
Icons.arrow_forward_ios,
color: Colors.grey,
size: 16,
)
]);