pubspec.yaml

name: lunarage
description: "Lunar Age"
# The following line prevents the package from being accidentally published to
# pub.dev using `flutter pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number is used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
# In Windows, build-name is used as the major, minor, and patch parts
# of the product and file versions while build-number is used as the build suffix.
version: 1.0.8+9

environment:
  sdk: ^3.6.0-198.0.dev

# Dependencies specify other packages that your package needs in order to work.
# To automatically upgrade your package dependencies to the latest versions
# consider running `flutter pub upgrade --major-versions`. Alternatively,
# dependencies can be manually updated by changing the version numbers below to
# the latest version available on pub.dev. To see which dependencies have newer
# versions available, run `flutter pub outdated`.
dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^1.0.8
  webview_flutter: ^4.10.0
  webview_flutter_android: any
  webview_flutter_wkwebview: any
  google_mobile_ads: ^6.0.0
  package_info_plus: ^9.0.0
  path_provider: ^2.0.11

dev_dependencies:
  flutter_test:
    sdk: flutter

  flutter_launcher_icons: ^0.14.3    #flutter pub run flutter_launcher_icons
  flutter_native_splash: ^2.4.4     #flutter pub run flutter_native_splash:create

  # The "flutter_lints" package below contains a set of recommended lints to
  # encourage good coding practices. The lint set provided by the package is
  # activated in the `analysis_options.yaml` file located at the root of your
  # package. See that file for information about deactivating specific lint
  # rules and activating additional ones.
  flutter_lints: ^6.0.0

flutter_launcher_icons:
  android: "launcher_icon"
  ios: true
  image_path: "assets/icon/icon.png"
  adaptive_icon_background: "assets/icon/icon_back.png"
  adaptive_icon_foreground: "assets/icon/icon_fore.png"

flutter_native_splash:
  color: '#000000'
  image: 'assets/image/splash.png'
  color_dark: '#000000'
  image_dark: 'assets/image/splash.png'
  fullscreen: true
  android_12:
    icon_background_color: '#000000'
    image: 'assets/image/splash.png'
    icon_background_color_dark: '#000000'
    image_dark: 'assets/image/splash.png'

# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec

# The following section is specific to Flutter packages.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  # To add assets to your application, add an assets section, like this:
  # assets:
  #   - images/a_dot_burr.jpeg
  #   - images/a_dot_ham.jpeg
  assets:
    - assets/icon/
    - assets/image/
    - assets/httpdocs/
    - assets/httpdocs/common/css/
    - assets/httpdocs/image/
    - assets/httpdocs/js/

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.dev/to/resolution-aware-images

  # For details regarding adding assets from package dependencies, see
  # https://flutter.dev/to/asset-from-package

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # fonts:
  #   - family: Schyler
  #     fonts:
  #       - asset: fonts/Schyler-Regular.ttf
  #       - asset: fonts/Schyler-Italic.ttf
  #         style: italic
  #   - family: Trajan Pro
  #     fonts:
  #       - asset: fonts/TrajanPro.ttf
  #       - asset: fonts/TrajanPro_Bold.ttf
  #         weight: 700
  #
  # For details regarding fonts from package dependencies,
  # see https://flutter.dev/to/font-from-package

lib/ad_banner_widget.dart

import 'package:flutter/cupertino.dart';
import 'package:google_mobile_ads/google_mobile_ads.dart';

import 'package:lunarage/ad_manager.dart';

class AdBannerWidget extends StatefulWidget {
  final AdManager adManager;
  const AdBannerWidget({super.key, required this.adManager});
  @override
  State<AdBannerWidget> createState() => _AdBannerWidgetState();
}

class _AdBannerWidgetState extends State<AdBannerWidget> {
  int _lastBannerWidthDp = 0;
  bool _isAdLoaded = false;
  bool _isLoading = false;
  @override
  Widget build(BuildContext context) {
    return SafeArea(
      child: LayoutBuilder(
        builder: (context, constraints) {
          final int width = constraints.maxWidth.isFinite
              ? constraints.maxWidth.truncate()
              : MediaQuery.of(context).size.width.truncate();
          final bannerAd = widget.adManager.bannerAd;
          if (width > 0) {
            WidgetsBinding.instance.addPostFrameCallback((_) {
              if (mounted) {
                final bannerAd = widget.adManager.bannerAd;
                final bool widthChanged = _lastBannerWidthDp != width;
                final bool sizeMismatch =
                    bannerAd == null || bannerAd.size.width != width;
                if ((widthChanged || !_isAdLoaded || sizeMismatch) &&
                    !_isLoading) {
                  _lastBannerWidthDp = width;
                  setState(() {
                    _isAdLoaded = false;
                    _isLoading = true;
                  });
                  widget.adManager.loadAdaptiveBannerAd(width, () {
                    if (mounted) {
                      setState(() {
                        _isAdLoaded = true;
                        _isLoading = false;
                      });
                    }
                  });
                }
              }
            });
          }
          if (_isAdLoaded && bannerAd != null) {
            return Column(
              mainAxisSize: MainAxisSize.min,
              children: [
                SizedBox(height: 10),
                Row(
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: [
                    SizedBox(
                      width: bannerAd.size.width.toDouble(),
                      height: bannerAd.size.height.toDouble(),
                      child: AdWidget(ad: bannerAd),
                    ),
                  ],
                )
              ]
            );
          } else {
            return const SizedBox.shrink();
          }
        },
      ),
    );
  }
}

lib/ad_manager.dart

import 'dart:async';
import 'dart:io' show Platform;
import 'dart:ui';
import 'package:google_mobile_ads/google_mobile_ads.dart';

class AdManager {
  // Test IDs
  // static const String _androidAdUnitId = "ca-app-pub-3940256099942544/6300978111";
  // static const String _iosAdUnitId     = "ca-app-pub-3940256099942544/2934735716";

  // Production IDs
  static const String _androidAdUnitId = "ca-app-pub-0/0";
  static const String _iosAdUnitId     = "ca-app-pub-0/0";

  static String get _adUnitId =>
      Platform.isIOS ? _iosAdUnitId : _androidAdUnitId;

  BannerAd? _bannerAd;
  int _lastWidthPx = 0;
  VoidCallback? _onLoadedCb;
  Timer? _retryTimer;
  int _retryAttempt = 0;

  BannerAd? get bannerAd => _bannerAd;

  Future<void> loadAdaptiveBannerAd(
    int widthPx,
    VoidCallback onAdLoaded,
  ) async {
    _onLoadedCb = onAdLoaded;
    _lastWidthPx = widthPx;
    _retryAttempt = 0;
    _retryTimer?.cancel();
    _startLoad(widthPx);
  }

  Future<void> _startLoad(int widthPx) async {
    _bannerAd?.dispose();

    AnchoredAdaptiveBannerAdSize? adaptiveSize;
    try {
      adaptiveSize =
          await AdSize.getCurrentOrientationAnchoredAdaptiveBannerAdSize(
            widthPx,
          );
    } catch (_) {
      adaptiveSize = null;
    }
    final AdSize size = adaptiveSize ?? AdSize.fullBanner;

    _bannerAd = BannerAd(
      adUnitId: _adUnitId,
      request: const AdRequest(),
      size: size,
      listener: BannerAdListener(
        onAdLoaded: (ad) {
          _retryTimer?.cancel();
          _retryAttempt = 0;
          final cb = _onLoadedCb;
          if (cb != null) {
            cb();
          }
        },
        onAdFailedToLoad: (ad, err) {
          ad.dispose();
          _scheduleRetry();
        },
      ),
    )..load();
  }

  void _scheduleRetry() {
    _retryTimer?.cancel();
    // Exponential backoff: 3s, 6s, 12s, max 30s
    _retryAttempt = (_retryAttempt + 1).clamp(1, 5);
    final seconds = _retryAttempt >= 4 ? 30 : (3 << (_retryAttempt - 1));
    _retryTimer = Timer(Duration(seconds: seconds), () {
      _startLoad(_lastWidthPx > 0 ? _lastWidthPx : 320);
    });
  }

  void dispose() {
    _bannerAd?.dispose();
    _retryTimer?.cancel();
  }
}

lib/const_value.dart

///
/// @author akira ohmachi
/// @copyright ao-system, Inc.
/// @date 2023-10-15
///
library;

import 'package:flutter/material.dart';

class ConstValue {
  //color
  static const Color colorHeader = Color.fromRGBO(0,0,0,0.1);
  static const Color colorText = Color.fromRGBO(255,255,255,1);
  static const Color colorBack = Color.fromRGBO(0,0,0,1);
  static const Color colorSettingHeader = Color.fromRGBO(69, 99, 202, 1.0);
  static const Color colorUiActiveColor = Color.fromRGBO(69, 99, 202, 1.0);
  static const Color colorUiInactiveColor = Colors.black26;

}

lib/local_server.dart

///
/// @author akira ohmachi
/// @copyright ao-system, Inc.
/// @date 2025-02-20
///
library;

import 'dart:async';
import 'dart:io';
import 'package:flutter/services.dart';

class LocalServer {
  late HttpServer _server;
  String _serverUrl = '';
  final Map<String, Uint8List> _cache = {};
  final Map<String, ContentType> _contentTypeCache = {};

  LocalServer() { //constructor
  }

  Future<void> start() async {
    final Completer<void> completer = Completer<void>();
    _server = await HttpServer.bind(InternetAddress.loopbackIPv4, 8080);
    _serverUrl = 'http://${_server.address.host}:${_server.port}/';
    _server.listen((HttpRequest request) async {
      final pathSegments = request.uri.pathSegments;
      final String rawPath = pathSegments.join('/');
      final String pathWithoutQuery = rawPath.split('?')[0];
      final String path = pathWithoutQuery.isEmpty ? 'assets/httpdocs/index.html' : 'assets/httpdocs/$pathWithoutQuery';

      try {
        // Check cache first
        if (_cache.containsKey(path)) {
          request.response.headers.contentType = _contentTypeCache[path];
          request.response.headers.set(HttpHeaders.cacheControlHeader, 'public, max-age=31536000'); // Cache for 1 year
          request.response.add(_cache[path]!);
          await request.response.close();
          return;
        }

        ContentType contentType;
        if (path.endsWith('.html')) {
          contentType = ContentType.html;
        } else if (path.endsWith('.css')) {
          contentType = ContentType('text', 'css');
        } else if (path.endsWith('.js')) {
          contentType = ContentType('application', 'javascript');
        } else if (path.endsWith('.webp')) {
          contentType = ContentType('image', 'webp');
        } else if (path.endsWith('.ico')) {
          contentType = ContentType('image', 'icon');
        } else {
          contentType = ContentType('application', 'octet-stream');
        }

        final ByteData data = await rootBundle.load(path);
        final Uint8List bytes = data.buffer.asUint8List();

        // Store in cache
        _cache[path] = bytes;
        _contentTypeCache[path] = contentType;

        request.response.headers.contentType = contentType;
        request.response.headers.set(HttpHeaders.cacheControlHeader, 'public, max-age=31536000'); // Cache for 1 year
        request.response.add(bytes);
        await request.response.close();
      } catch (e) {
        request.response.statusCode = HttpStatus.notFound;
        request.response.write('404 Not Found');
        await request.response.close();
      }
    });
    completer.complete();
    return completer.future;
  }

  void close() {
    _server.close();
  }

  String url() {
    return _serverUrl;
  }
}

lib/main.dart

///
/// @author akira ohmachi
/// @copyright ao-system, Inc.
/// @date 2025-02-17
///
library;

import 'package:flutter/material.dart';
import 'package:package_info_plus/package_info_plus.dart';
import 'package:webview_flutter/webview_flutter.dart';

import 'package:lunarage/const_value.dart';
import 'package:lunarage/version_state.dart';
import 'package:lunarage/setting.dart';
import 'package:lunarage/ad_manager.dart';
import 'package:lunarage/ad_banner_widget.dart';
import 'package:lunarage/my_web_view_controller.dart';
import 'package:lunarage/local_server.dart';

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

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

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        useMaterial3: true,
      ),
      home: const MainHomePage(),
    );
  }
}

class MainHomePage extends StatefulWidget {
  const MainHomePage({super.key});
  @override
  State<MainHomePage> createState() => _MainHomePageState();
}

class _MainHomePageState extends State<MainHomePage> {
  late AdManager _adManager;
  final MyWebViewController _myWebViewController = MyWebViewController(); //WebViewController
  final LocalServer _localServer = LocalServer(); //ローカルサーバー
  late final WebViewController _webViewController;
  late final List<int> _yearList;
  late final List<DropdownMenuItem<int>> _yearDropdownItems;
  final List<int> _monthList = List<int>.generate(12, (index) => index + 1);
  late final List<DropdownMenuItem<int>> _monthDropdownItems;
  int _selectedYear = DateTime.now().year;
  int _selectedMonth = DateTime.now().month;

  //アプリのバージョン取得
  void _getVersion() async {
    PackageInfo packageInfo = await PackageInfo.fromPlatform();
    setState(() {
      VersionState.versionSave(packageInfo.version);
    });
  }

  void _updateWebView() async {
    String serverUrl = _localServer.url();
    await _webViewController.loadRequest(Uri.parse('${serverUrl}index.html?year=$_selectedYear&month=$_selectedMonth'));
  }

  List<int> _generateYearList() {
    int currentYear = DateTime.now().year;
    return List<int>.generate(161, (index) => currentYear - 80 + index);
  }
  void _incrementYear() {
    setState(() {
      if (_selectedYear < _yearList.last) {
        _selectedYear += 1;
      }
      _updateWebView();
    });
  }
  void _decrementYear() {
    setState(() {
      if (_selectedYear > _yearList.first) {
        _selectedYear -= 1;
      }
      _updateWebView();
    });
  }
  void _incrementMonth() {
    setState(() {
      if (_selectedMonth < 12) {
        _selectedMonth += 1;
      } else {
        if (_selectedYear < _yearList.last) {
          _selectedMonth = 1;
          _selectedYear += 1;
        }
      }
      _updateWebView();
    });
  }
  void _decrementMonth() {
    setState(() {
      if (_selectedMonth > 1) {
        _selectedMonth -= 1;
      } else {
        if (_selectedYear > _yearList.first) {
          _selectedMonth = 12;
          _selectedYear -= 1;
        }
      }
      _updateWebView();
    });
  }

  //ページ起動開始時に一度だけ呼ばれる
  @override
  void initState() {
    super.initState();
    _adManager = AdManager();
    _yearList = _generateYearList();
    _yearDropdownItems = _yearList.map<DropdownMenuItem<int>>((int year) {
      return DropdownMenuItem<int>(
        value: year,
        child: Text(year.toString(),
            style: const TextStyle(
              color: ConstValue.colorText,
            )
        ),
      );
    }).toList();
    _monthDropdownItems = _monthList.map<DropdownMenuItem<int>>((int month) {
      return DropdownMenuItem<int>(
        value: month,
        child: Text(
          month.toString(),
          style: const TextStyle(color: Colors.white), // テキストの色を設定
        ),
      );
    }).toList();
    _webViewController = _myWebViewController.controller();
    _initApp();
  }

  // アプリの非同期初期化処理
  Future<void> _initApp() async {
    _getVersion();
    // ローカルサーバーが起動してからWebViewをロードする
    await _localServer.start();
    _updateWebView();
  }
  //ページ終了時に一度だけ呼ばれる
  @override
  void dispose() {
    _adManager.dispose();
    _localServer.close();
    super.dispose();
  }
  //画面全体
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.transparent,
      appBar: AppBar(
        backgroundColor: ConstValue.colorHeader,
        //タイトル表示
        title: const Text('Lunar age',
          style: TextStyle(
            color: Colors.white,
            fontSize: 15.0,
          )
        ),
        //設定ボタン
        actions: <Widget>[
          TextButton(
            onPressed: () async {
              bool? ret = await Navigator.of(context).push(
                MaterialPageRoute<bool>(builder:(context) => const SettingPage()),
              );
              //awaitで呼び出しているので、settingから戻ったら以下が実行される。
              if (ret!) { //設定で適用だった場合
                setState(() {});
              }
            },
            child: Text('Information',
              style: const TextStyle(
                color: Colors.white,
              )
            )
          )
        ]
      ),
      body: SafeArea(
        child: Column(children:[
          Row(children:[
            Expanded(child: _selectYear()),
            Expanded(child: _selectMonth()),
          ]),
          Expanded(
            child: Padding(
              padding: const EdgeInsets.only(top: 10, left: 10, right: 10, bottom: 0),
              child: Center(
                child: WebViewWidget(controller: _webViewController),
              ),
            )
          ),
        ])
      ),
      bottomNavigationBar: AdBannerWidget(adManager: _adManager),
    );
  }

  Widget _selectYear() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        IconButton(
          icon: Icon(Icons.chevron_left),
          color: Colors.white,
          onPressed: _decrementYear,
        ),
        DropdownButton<int>(
          value: _selectedYear,
          onChanged: (int? newValue) {
            setState(() {
              _selectedYear = newValue!;
              _updateWebView();
            });
          },
          dropdownColor: Colors.grey[850],
          items: _yearDropdownItems,
        ),
        IconButton(
          icon: Icon(Icons.chevron_right),
          color: Colors.white,
          onPressed: _incrementYear,
        ),
      ],
    );
  }

  Widget _selectMonth() {
    return Row(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        IconButton(
          icon: Icon(Icons.chevron_left),
          color: Colors.white,
          onPressed: _decrementMonth,
        ),
        DropdownButton<int>(
          value: _selectedMonth,
          onChanged: (int? newValue) {
            setState(() {
              _selectedMonth = newValue!;
              _updateWebView();
            });
          },
          dropdownColor: Colors.grey[850],  // ドロップダウンの背景色を設定
          items: _monthDropdownItems,
        ),
        IconButton(
          icon: Icon(Icons.chevron_right),
          color: Colors.white,
          onPressed: _incrementMonth,
        ),
      ],
    );
  }
}

lib/my_web_view_controller.dart

///
/// @author akira ohmachi
/// @copyright ao-system, Inc.
/// @date 2025-02-20
///
library;

import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';
import 'package:webview_flutter_android/webview_flutter_android.dart';
import 'package:webview_flutter_wkwebview/webview_flutter_wkwebview.dart';

class MyWebViewController {
  MyWebViewController() {
    //constructor
  }
  WebViewController controller() {
    late final PlatformWebViewControllerCreationParams params;
    if (WebViewPlatform.instance is WebKitWebViewPlatform) {
      params = WebKitWebViewControllerCreationParams(
        allowsInlineMediaPlayback: true,
        mediaTypesRequiringUserAction: const <PlaybackMediaTypes>{},
      );
    } else {
      params = const PlatformWebViewControllerCreationParams();
    }
    final WebViewController controller = WebViewController.fromPlatformCreationParams(params);
    controller
      ..setJavaScriptMode(JavaScriptMode.unrestricted)
      ..setNavigationDelegate(
        NavigationDelegate(
          onUrlChange: (UrlChange change) {
            //debugPrint('url change to ${change.url}');
          },
        ),
      );
    controller.setBackgroundColor(const Color(0x00000000));
    if (controller.platform is AndroidWebViewController) {
      AndroidWebViewController.enableDebugging(true);
      (controller.platform as AndroidWebViewController).setMediaPlaybackRequiresUserGesture(false);
    }
    return controller;
  }
}

lib/setting.dart

///
/// @author akira ohmachi
/// @copyright ao-system, Inc.
/// @date 2023-10-15
///
library;

import 'package:flutter/material.dart';

import 'package:lunarage/version_state.dart';
import 'package:lunarage/ad_manager.dart';
import 'package:lunarage/ad_banner_widget.dart';

class SettingPage extends StatefulWidget {
  const SettingPage({super.key});
  @override
  State<SettingPage> createState() => _SettingPageState();
}

class _SettingPageState extends State<SettingPage> {
  late AdManager _adManager;
  //ページ起動時に一度だけ実行される
  @override
  void initState() {
    super.initState();
    _adManager = AdManager();
  }
  //ページ終了時に一度だけ実行される
  @override
  void dispose() {
    _adManager.dispose();
    super.dispose();
  }
  //ページ描画
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Theme.of(context).colorScheme.surface,
      appBar: AppBar(
        centerTitle: true,
        elevation: 0,
        //設定キャンセルボタン
        leading: IconButton(
          icon: const Icon(Icons.close),
          onPressed: () {
            Navigator.of(context).pop(false); //falseを返す
          },
        ),
        title: Text(
          'Information',
          style: TextStyle(
            color: Theme.of(context).colorScheme.onSurface,
          ),
        ),
        foregroundColor: Theme.of(context).colorScheme.onSurface,
        actions: [
          //設定OKボタン
          IconButton(
            icon: const Icon(Icons.check),
            onPressed: () async {
              if (!mounted) {
                return;
              }
              Navigator.of(context).pop(true);  //trueを返す
            },
          ),
        ],
      ),
      body: SafeArea(
        child: Column(children:[
          Expanded(
            child: Padding(
              padding: const EdgeInsets.all(20),
              child: Column(children: [
                Padding(
                  padding: const EdgeInsets.only(top: 24, left: 0, right: 0, bottom: 36),
                  child: SizedBox(
                    child: Text('version  ${VersionState.versionLoad()}',
                      style: TextStyle(
                        fontSize: 10,
                        color: Theme.of(context).colorScheme.onSurface,
                      ),
                    ),
                  ),
                ),
              ]),
            ),
          ),
        ]),
      ),
      bottomNavigationBar: AdBannerWidget(adManager: _adManager),
    );
  }
}

lib/version_state.dart

///
/// @author akira ohmachi
/// @copyright ao-system, Inc.
/// @date 2023-01-27
///
library;

class VersionState {

  static String _version = '';

  //バージョンを記録
  static void versionSave(String str) {
    _version = str;
  }
  //バージョンを返す
  static String versionLoad() {
    return _version;
  }

}