ColumnからListViewに変更時のエラー

Question

前提・実現したいこと

Columnを使ったレイアウトをListViewに置き換え、スクロール可能にしたい。
Columnでは問題なく動いていた状態でした。
項目が増えた場合にスクロール可能にしたいと思い、ColumnウィジェットをListViewウィジェットに置き換えたらエラーが発生しました。

発生している問題・エラーメッセージ

════════ Exception caught by rendering library ═════════════════════════════════════════════════════
RenderBox was not laid out: _RenderScrollSemantics#1af73 relayoutBoundary=up3 NEEDS-PAINT NEEDS-COMPOSITING-BITS-UPDATE
'package:flutter/src/rendering/box.dart':
Failed assertion: line 1702 pos 12: 'hasSize'
The relevant error-causing widget was: 
  Column file:///Users/to/AndroidStudioProjects/test_app/lib/main.dart:71:16
════════════════════════════════════════════════════════════════════════════════════════════════════

════════ Exception caught by rendering library ═════════════════════════════════════════════════════
RenderBox was not laid out: RenderViewport#458c4 NEEDS-PAINT
'package:flutter/src/rendering/box.dart':
Failed assertion: line 1702 pos 12: 'hasSize'
The relevant error-causing widget was: 
  ListView file:///Users/to/AndroidStudioProjects/test_app/lib/main.dart:93:13
════════════════════════════════════════════════════════════════════════════════════════════════════

════════ Exception caught by scheduler library ═════════════════════════════════════════════════════
The getter 'visible' was called on null.
Receiver: null
Tried calling: visible
════════════════════════════════════════════════════════════════════════════════════════════════════

該当のソースコード

import 'package:flutter/material.dart';
import 'package:test_app/forth_screen.dart';
import 'second_screen.dart';
import 'third_screen.dart';
import 'forth_screen.dart';
import 'fifth_screen.dart';
import 'sixth_screen.dart';
import 'seventh_screen.dart';
import 'eighth_screen.dart';
import 'nineth_screen.dart';
import 'package:flutter/rendering.dart';

void main() {
  debugPaintSizeEnabled = false;
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: '1st Screen'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class MakeButton extends StatelessWidget {
  MakeButton(this.title);
  final String title;
  @override
  Widget build(BuildContext context) {
    return Container(
      height: 50,
      width: 120,
      alignment: Alignment.center,
      decoration: BoxDecoration(
        color: Colors.lightBlue,
        borderRadius: BorderRadius.all(Radius.circular(5.0)),
      ),
      child: Text(
        this.title,
        style: TextStyle(
          color: Colors.white,
          fontWeight: FontWeight.bold,
        ),
      ),
    );
  }
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          children: [
            Padding(
              padding: const EdgeInsets.only(top: 30),
              child: Hero(
                tag: 'tag',
                child: ClipRRect(
                  borderRadius: BorderRadius.all(Radius.circular(30)),
                  child: Container(
                    height: 250,
                    width: 250,
                    decoration: BoxDecoration(
                      gradient: LinearGradient(
                          colors: [Colors.lightBlue, Colors.indigo]),
                    ),
                  ),
                ),
              ),
            ),
            SizedBox(
              height: 30,
            ),
//下の行のWidgetをColumnからListViewへ変更時にエラー発生
            **ListView**(
              children: [
                Row(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    MaterialButton(
                      padding: EdgeInsets.all(0),
                      onPressed: () {
                        Navigator.push(
                          context,
                          MaterialPageRoute(
                              builder: (context) => SecondScreen()),
                        );
                      },
                      child: MakeButton('2nd Screen'),
                    ),
                    SizedBox(
                      width: 15,
                    ),
                    MaterialButton(
                      padding: EdgeInsets.all(0),
                      onPressed: () {
                        Navigator.push(
                          context,
                          MaterialPageRoute(
                              builder: (context) => ThirdScreen()),
                        );
                      },
                      child: MakeButton('3rd Screen'),
                    ),
                  ],
                ),
                SizedBox(
                  height: 15,
                ),
                Row(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    MaterialButton(
                      padding: EdgeInsets.all(0),
                      onPressed: () {
                        Navigator.push(
                          context,
                          MaterialPageRoute(
                              builder: (context) => ForthScreen()),
                        );
                      },
                      child: MakeButton('4th Screen'),
                    ),
                    SizedBox(
                      width: 15,
                    ),
                    MaterialButton(
                      padding: EdgeInsets.all(0),
                      onPressed: () {
                        Navigator.push(
                          context,
                          MaterialPageRoute(
                              builder: (context) => FifthScreen()),
                        );
                      },
                      child: MakeButton('5th Screen'),
                    ),
                  ],
                ),
                SizedBox(
                  height: 15,
                ),
                Row(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    MaterialButton(
                      padding: EdgeInsets.all(0),
                      onPressed: () {
                        Navigator.push(
                          context,
                          MaterialPageRoute(
                              builder: (context) => SixthScreen()),
                        );
                      },
                      child: MakeButton('6th Screen'),
                    ),
                    SizedBox(
                      width: 15,
                    ),
                    MaterialButton(
                      padding: EdgeInsets.all(0),
                      onPressed: () {
                        Navigator.push(
                          context,
                          MaterialPageRoute(
                              builder: (context) => SeventhScreen()),
                        );
                      },
                      child: MakeButton('7th Screen'),
                    ),
                  ],
                ),
                SizedBox(
                  height: 15,
                ),
                Row(
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    MaterialButton(
                      padding: EdgeInsets.all(0),
                      onPressed: () {
                        Navigator.push(
                          context,
                          MaterialPageRoute(
                              builder: (context) => EighthScreen()),
                        );
                      },
                      child: MakeButton('8th Screen'),
                    ),
                    SizedBox(
                      width: 15,
                    ),
                    MaterialButton(
                      padding: EdgeInsets.all(0),
                      onPressed: () {
                        Navigator.push(
                          context,
                          MaterialPageRoute(
                              builder: (context) => NinethScreen()),
                        );
                      },
                      child: MakeButton('9th Screen'),
                    ),
                  ],
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

補足情報（FW/ツールのバージョンなど）

省略。

Answer 1

shrinkWrapをtrueに設定することで、解決すると思います。

ListView(
  shrinkWrap: true,
  children: ...
),

もしくは、こんな感じでListView自体に高さを設定するという方法もあります。

Container(
  height: 300,
  child: ListView(
    children: ...
),

Comments

[Inete6Q]

どちらでもうまく動きました！ありがとうございます！