How to add a ListView in a Dialog in Flutter

In this Google flutter code example we are going to learn how to to add a ListView in a Dialog in Flutter.

The code is based on flutter version 1.0.0

Main.dart (App entry point)

import 'package:flutter/material.dart';
import 'week4/listview_in_alertdialog_task-2.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      //home: MyHomePage(title: 'Flutter Demo Home Page'),
      home: ListViewAlertDialog(),
    );
  }
}

listview_in_alertdialog_task-2.dart

import 'package:flutter/material.dart';

class ListViewAlertDialog extends StatelessWidget {
  List<String> _listViewData = [
    "A List View with many Text - Here's one!",
    "A List View with many Text - Here's another!",
    "A List View with many Text - Here's more!",
    "A List View with many Text - Here's more!",
    "A List View with many Text - Here's more!",
    "A List View with many Text - Here's more!",
    "A List View with many Text - Here's more!",
    "A List View with many Text - Here's more!",
    "A List View with many Text - Here's more!",
  ];

  _displayDialog(BuildContext context) async {
    return showDialog(
        context: context,
        builder: (context) {
          return AlertDialog(
            title: Text('ListView in Dialog'),
            content: Container(
              width: double.maxFinite,
              height: 300.0,
              child: ListView(
                padding: EdgeInsets.all(8.0),
                //map List of our data to the ListView
                children: _listViewData.map((data) => Text(data)).toList(),
              ),
            ),
            actions: <Widget>[
              new FlatButton(
                child: new Text('CANCEL'),
                onPressed: () {
                  Navigator.of(context).pop();
                },
              )
            ],
          );
        });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('ListView in AlertDialog'),
      ),
      body: Center(
        child: RaisedButton(
          child: Text('Show Alert Dialog'),
          color: Colors.red,
          onPressed: () => _displayDialog(context),
        ),
      ),
    );
  }
}

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