showOkAdaptiveDialog

main.dart

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Dialog Demo',
      theme: ThemeData(
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: const OKAdaptiveDialogCatalogScreen(),
    );
  }
}

class OKAdaptiveDialogCatalogScreen extends StatelessWidget {
  const OKAdaptiveDialogCatalogScreen({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('Dialog Demo'),
      ),
      body: ListView(
        padding: const EdgeInsets.all(8),
        children: <Widget>[
          ElevatedButton(
            onPressed: () async {
              await showOkAdaptiveDialog(
                context: context,
                title: 'ダイアログっていうのは',
                content: 'こういう部品だよ',
              );
            },
            child: const Text('シンプルなエラーメッセージ'),
          ),
        ],
      ),
    );
  }
}

Future<void> showOkAdaptiveDialog({
  required BuildContext context,
  String? title,
  String? content,
  String okLabel = 'OK',
  bool barrierDismissible = true,
}) async {
  await showAdaptiveDialog<void>(
    context: context,
    barrierDismissible: barrierDismissible,
    builder: (BuildContext context) => AlertDialog.adaptive(
      title: title != null ? Text(title) : null,
      content: content != null ? Text(content) : null,
      actions: <Widget>[
        TextButton(
          onPressed: () => Navigator.pop(context),
          child: Text(okLabel),
        ),
      ],
    ),
  );
}