Make a TextField use the minimum required width - forms

Question

For a TextField to work in Flutter, you need to give it a length. I've got a form working by wrapping the TextFields in Expandeds but I'd rather have the TextField resize based on the required width so that as the user types, the TextField expands. Here's my form code:
return Row(
children: <Widget>[
Expanded(
child: TextFormField(
keyboardType: TextInputType.number,
initialValue: snapshot.data[0].toString(),
textAlign: TextAlign.center,
decoration: InputDecoration(labelText: "Width", labelStyle: ),
),
),
Expanded(
child: TextFormField(
keyboardType: TextInputType.number,
initialValue: snapshot.data[1].toString(),
textAlign: TextAlign.center,
decoration: InputDecoration(labelText: "Height"),
),
),
],
);
And here is a picture of my form:

Answer 1

Simply add horizontal padding to the TextField like this
return Scaffold(
body: Center(
child: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: List.generate(2,
(index) => Expanded(
child: Padding(
padding: EdgeInsets.symmetric(horizontal: 16.0),
child: TextFormField(
keyboardType: TextInputType.number,
initialValue: index == 0 ? "3280" : "2464",
textAlign: TextAlign.center,
decoration: InputDecoration(
labelText: index == 0 ? "Width" : "Height"),
),
),
))),
),
);

Answer 2

You should set width for your text form field
for example:
#override
Widget build(BuildContext context) {
return Scaffold(
body: SafeArea(
child: Row(
mainAxisSize: MainAxisSize.min,
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Container(
width: 100,
child: TextFormField(
keyboardType: TextInputType.number,
initialValue: "11",
textAlign: TextAlign.center,
decoration: InputDecoration(labelText: "Width"),
),
),
Container(
width: 100,
child: TextFormField(
keyboardType: TextInputType.number,
initialValue: "22",
textAlign: TextAlign.center,
decoration: InputDecoration(labelText: "Height"),
),
),
],
),
),
);
}