How to set text in one line for flutter - dart

Question

I have next flutter/dart code for make in one line 4 text field:
Container(
margin: EdgeInsets.all(8.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
Container(
width: 100.0,
child: TextField(
maxLength: 2,
onChanged: (value) {
card.expMonth = int.parse(value);
},
keyboardType: TextInputType.number,
textAlign: TextAlign.center,
decoration: InputDecoration(
border: InputBorder.none, hintText: 'month'),
)),
Text("/",
style: TextStyle(fontSize: 36),
textAlign: TextAlign.center),
Container(
width: 100.0,
child: TextField(
maxLength: 2,
onChanged: (value) {
card.expYear = int.parse(value);
},
keyboardType: TextInputType.number,
textAlign: TextAlign.center,
decoration: InputDecoration(
border: InputBorder.none, hintText: 'year'),
)),
Container(
padding: EdgeInsets.only(left: 80.0),
width: 180.0,
child: TextField(
maxLength: 3,
onChanged: (value) {
card.cvc = int.parse(value);
},
keyboardType: TextInputType.number,
textAlign: TextAlign.center,
decoration: InputDecoration(
border: InputBorder.none, hintText: 'cvc'),
)),
],
),
)
and he see this:
How make all text fields in one line. In android app i simple use guideline or other simple paths. And here i smash with flutter reality where different textfields have different visibility with the same, at first glance, the parameters
UPD.: I make crutch solution:
Padding(
padding: EdgeInsets.only(bottom: 20),
child: Text("/",
style: TextStyle(fontSize: 36),
textAlign: TextAlign.center),
),
but it's stupid how i think

Answer 1

This is how I would do it:
Row(children: <Widget>[
Expanded(
child: TextField(
inputFormatters: [LengthLimitingTextInputFormatter(2)],
keyboardType: TextInputType.number,
textAlign: TextAlign.center,
decoration: InputDecoration(
border: InputBorder.none, hintText: 'month'),
)),
Expanded(
child: Text("/",
style: TextStyle(fontSize: 36),
textAlign: TextAlign.center)),
Expanded(
child: TextField(
inputFormatters: [LengthLimitingTextInputFormatter(2)],
keyboardType: TextInputType.number,
textAlign: TextAlign.center,
decoration: InputDecoration(
border: InputBorder.none, hintText: 'year'),
)),
Expanded(
child: TextField(
inputFormatters: [LengthLimitingTextInputFormatter(3)],
keyboardType: TextInputType.number,
textAlign: TextAlign.center,
decoration: InputDecoration(
border: InputBorder.none, hintText: 'cvc'),
)),
])
Which produces this:
I used inputFormatters: [LengthLimitingTextInputFormatter(2)] instead of maxLength so that the user is still only able to enter in a limited length but you don't get the counter below the TextField as it looks neater.