flutter columns and rows code example
Example 1: flutter center row
mainAxisAlignment: MainAxisAlignment.center //Center Column contents vertically,
Example 2: next row column in flutter
var phoneNumber = new Row(
mainAxisSize: MainAxisSize.min,
children: <Widget>[
Expanded(
child: new Padding(
padding: const EdgeInsets.all(20.0),
child: countryCodePicker,
),
),
Expanded(
child: new Padding(
padding: const EdgeInsets.all(20.0),
child: mobileNumber,
),
),
],
);