!!!Flutter
[Dart]

{{amazon B07LBPRHQD}}
*https://flutter.dev/

!SDK
*https://api.flutter.dev/index.html

!Widget
*https://flutter.dev/docs/development/ui/widgets
!拡張パッケージ
*https://pub.dev/flutter/packages
!Flutter Studio
*https://flutterstudio.app/

!!!Install
!!Mac
*https://flutter.dev/docs/get-started/install/macos
!インストール
+sdkダウンロード
+unzipで解凍
+.bash_profile にPATH登録
+flutter doctor コマンドで必要な作業のチェックとヘルプ
!実行
+xcodeのダウンロード
+command line tools の有効化
++sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer/
+cocoapods のインストール 
++sudo gem install cocoapods
++pod setup
+シミュレーターの起動
++open - a Simulator
+プロジェクトの作成
++flutter create my_app
+プロジェクトディレクトリで、
++flutter run
!Firebase
+プロジェクトフォルダで以下を実行しXcodeで
++open ios/Runner.xcworkspace
{{ref_image ios_bundle_id.png}}
++Firebase にバンドルIDを登録
++cd ios
++pod setup
+https://developers.google.com/identity/sign-in/ios/start-integrating
!!!環境構築
*http://typea.info/blg/glob/2019/10/xamarin-flutter.html

!!!Firebase
::Flutterfire
*https://github.com/FirebaseExtended/flutterfire

!!Firebase Auth
*https://pub.dev/packages/firebase_auth
::example
*https://github.com/FirebaseExtended/flutterfire/tree/master/packages/firebase_auth/example

!!Google Sign in
*https://pub.dev/packages/google_sign_in
::example
*https://github.com/flutter/plugins/blob/master/packages/google_sign_in/example/lib/main.dart

!!!Tips
!!AndroidX対応
*[AndriodX対応|http://typea.info/blg/glob/2019/10/flutter-androidx.html]
!!メニュー
!ドロワーメニュー
*https://flutter.dev/docs/cookbook/design/drawer
 return Scaffold(
   appBar: AppBar(),
   drawer: Drawer(),
   body: Center(),
 );
!!画面遷移
*[画面遷移|http://typea.info/blg/glob/2019/10/flutter.html]
!呼び出し元
 RaisedButton(
   onPressed: (){
     Navigator.push(
       context,
       MaterialPageRoute(builder: (context) => SecondRoute()),
     );
   },
   child: const Text('Open Second Screen'),
!呼び出し先
 import 'package:flutter/material.dart';
  
 class SecondRoute extends StatefulWidget {
   @override
   State<StatefulWidget> createState() {
     return _SecondRouted();
   }
 }
  
 class _SecondRouted extends State<SecondRoute> {
   @override
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(),
       body: Center(),
     );
   }
 }
!!Dialog
*[Dialog|http://typea.info/blg/glob/2019/10/flutter-dialog.html]
!!画像選択
*[画像選択|http://typea.info/blg/glob/2019/10/flutter-1.html]
!!画像切り抜き
*[画像切り抜き|http://typea.info/blg/glob/2019/10/flutter-2.html]
!!DB
!Sqlite
*https://flutter.ctrnost.com/logic/sqlite/
*[sqfliteパッケージの利用|http://typea.info/blg/glob/2019/12/flutter-sqlite.html]