SingleChildScrollView

sample.packages.flutter.lib.src.widgets.single_child_scroll_view.89.

In this example, the children are spaced out equally, unless there's no more room, in which case they stack vertically and scroll.

When using this technique, [Expanded] and [Flexible] are not useful, because in both cases the "available space" is infinite (since this is in a viewport). The next section describes a technique for providing a maximum height constraint.

  
import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  static const String _title = 'Flutter Code Sample';

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      title: _title,
      home: MyStatelessWidget(),
    );
  }
}

class MyStatelessWidget extends StatelessWidget {
  const MyStatelessWidget({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return DefaultTextStyle(
      style: Theme.of(context).textTheme.bodyText2!,
      child: LayoutBuilder(
        builder: (BuildContext context, BoxConstraints viewportConstraints) {
          return SingleChildScrollView(
            child: ConstrainedBox(
              constraints: BoxConstraints(
                minHeight: viewportConstraints.maxHeight,
              ),
              child: Column(
                mainAxisSize: MainAxisSize.min,
                mainAxisAlignment: MainAxisAlignment.spaceAround,
                children: [
                  Container(
                    // A fixed-height child.
                    color: const Color(0xffeeee00), // Yellow
                    height: 120.0,
                    alignment: Alignment.center,
                    child: const Text('Fixed Height Content'),
                  ),
                  Container(
                    // Another fixed-height child.
                    color: const Color(0xff008000), // Green
                    height: 120.0,
                    alignment: Alignment.center,
                    child: const Text('Fixed Height Content'),
                  ),
                ],
              ),
            ),
          );
        },
      ),
    );
  }
}