Here are my Flutter notes just for quick view
flutter clean && flutter build appbundle --release
https://medium.com/@psyanite/how-to-sign-and-release-your-flutter-app-ed5e9531c2ac
https://stackoverflow.com/questions/50419286/install-android-app-bundle-on-device
https://stackoverflow.com/questions/25176594/android-sdk-location
https://stackoverflow.com/questions/3997748/how-can-i-create-a-keystore
https://developer.android.com/studio/command-line/bundletool#generate_apks
https://flutter.dev/docs/deployment/android
https://stackoverflow.com/questions/2169294/how-to-add-manifest-permission-to-an-application
https://pub.dev/packages/grouped_buttons
https://inducesmile.com/google-flutter/how-to-get-checkbox-value-in-flutter/ - checkboxes examples
https://stackoverflow.com/questions/54220058/how-to-save-checkbox-status-in-flutter
https://appicon.co/ create your custom icons
https://pub.dev/packages/mailer
https://github.com/JaysQubeXon/flutter_mailer/blob/master/example/README.md
https://resocoder.com/2019/04/13/flutter-video-player-chewie-tutorial/
https://medium.com/@nitishk72/form-validation-in-flutter-d762fbc9212c onsave
https://stackoverflow.com/questions/51765092/how-to-scroll-page-in-flutter
https://flutter.dev/docs/cookbook/forms/validation <-
https://youtu.be/XP-4BiWsuaQ -How to play video from local file system
https://stackoverflow.com/questions/51930754/flutter-wrapping-text
https://flutter.dev/docs/development/ui/widgets/cupertino
https://stackoverflow.com/questions/44053363/flutter-padding-for-all-widgets
https://www.dartlang.Org/guides/language/language-tour#constructors
https://docs.flutter.io/flutter/widgets/Container-class.html
https://flutter.dev/docs/development/ui/widgets/layout
https://docs.flutter.io/flutter/material/Scaffold-class.html
https://docs.flutter.io/flutter/material/AppBar-class.html
https://flutter.dev/docs/development/ui/widgets/layout
https://flutter.dev/docs/cookbook/navigation/navigation-basics
https://docs.flutter.io/flutter/widgets/Container-class.html
https://docs.flutter.io/flutter/widgets/Padding-class.html
https://docs.flutter.io/flutter/material/Card-class.html
https://docs.flutter.io/flutter/widgets/Expanded-class.html
https://www.dartlang.Org/faq#q-is-dart-a-statically-typed-language // dont use var
https:/flutter.dev/docs/development/ui/widgets/material#Buttons
https://api.dartlang.Org/stable/2.2.0/dart-math/dart-math-library.html
https://www.dartlang.Org/guides/libraries/library-tour#collections
https://flutter.dev/docs/cookbook/design/themes
https://www.colorzilla.com/firefox/welcome/new/
https://developer.android.com/studio/run/device
https://pub.dartlang.0rg/f lutter/packages?q=slider
https://flutter.dev/docs/cookbook/navigation/navigation-basics
https://flutter.dev/docs/cookbook/navigation/named-routes
https://flutter.dev/docs/development/ui/widgets/cupertino
https://developer.android.com/training/transitions/index.html
https://docs.flutter.io/flutter/widgets/StreamBuilder-class.html
https://api.flutter.dev/flutter/widgets/ListView-class.html
https://pub.dev:packages/provider#-installing-tab-
https://api.flutter.dev/flutter/material/FlatButton-class.html
https://flutter.dev/docs/testing/errors
https://flutter.dev/docs/cookbook/forms/retrieve-input
Testing in Flutter https://flutter.dev/docs/cookbook/testing/unit/introduction
https://flutter.dev/docs/cookbook/testing/unit/mocking
https://flutter.dev/docs/cookbook/testing/widget/introduction
https://flutter.dev/docs/cookbook/testing/widget/finders