The Flutter Plugin Project Files

Creating the plugin project

$ flutter create --org com.example --template=plugin --platforms=android,ios,linux,macos,windows hello_plugin 

Signing iOS app for device deployment using developer identity: "Apple
Development: Yaohong Huang (WS3UUERGF9)"
Creating project hello_plugin...
Resolving dependencies in hello_plugin... (3.3s)
Got dependencies in hello_plugin.
Resolving dependencies in hello_plugin/example... (1.1s)
Got dependencies in hello_plugin/example.
Wrote 161 files.

All done!

Your plugin code is in hello_plugin/lib/hello_plugin.dart.

Your example app code is in hello_plugin/example/lib/main.dart.


Host platform code is in the android, ios, linux, macos, windows directories
under hello_plugin.
To edit platform code in an IDE see
https://flutter.dev/developing-packages/#edit-plugin-package.


To add platforms, run `flutter create -t plugin --platforms <platforms> .` under
hello_plugin.
For more information, see https://flutter.dev/go/plugin-platforms.

hello_plugin
├── CHANGELOG.md
├── LICENSE
├── README.md
├── analysis_options.yaml
├── android
│   ├── build.gradle
│   ├── hello_plugin_android.iml
│   ├── local.properties
│   ├── settings.gradle
│   └── src
│       ├── main
│       └── test
├── example
│   ├── README.md
│   ├── analysis_options.yaml
│   ├── android
│   │   ├── app
│   │   ├── build.gradle
│   │   ├── gradle
│   │   ├── gradle.properties
│   │   ├── gradlew
│   │   ├── gradlew.bat
│   │   ├── hello_plugin_example_android.iml
│   │   ├── local.properties
│   │   └── settings.gradle
│   ├── build
│   │   ├── 52f352800ae67b257006addf8ca3668f
│   │   ├── e29aedf18e567df5728f6b7ce57d2e97.cache.dill.track.dill
│   │   ├── ios
│   │   └── last_build_run.json
│   ├── hello_plugin_example.iml
│   ├── integration_test
│   │   └── plugin_integration_test.dart
│   ├── ios
│   │   ├── Flutter
│   │   ├── Podfile
│   │   ├── Podfile.lock
│   │   ├── Pods
│   │   ├── Runner
│   │   ├── Runner.xcodeproj
│   │   ├── Runner.xcworkspace
│   │   └── RunnerTests
│   ├── lib
│   │   └── main.dart
│   ├── linux
│   │   ├── CMakeLists.txt
│   │   ├── flutter
│   │   ├── main.cc
│   │   ├── my_application.cc
│   │   └── my_application.h
│   ├── macos
│   │   ├── Flutter
│   │   ├── Podfile
│   │   ├── Runner
│   │   ├── Runner.xcodeproj
│   │   ├── Runner.xcworkspace
│   │   └── RunnerTests
│   ├── pubspec.lock
│   ├── pubspec.yaml
│   ├── test
│   │   └── widget_test.dart
│   └── windows
│       ├── CMakeLists.txt
│       ├── flutter
│       └── runner
├── hello_plugin.iml
├── ios
│   ├── Assets
│   ├── Classes
│   │   └── HelloPlugin.swift
│   └── hello_plugin.podspec
├── lib
│   ├── hello_plugin.dart
│   ├── hello_plugin_method_channel.dart
│   └── hello_plugin_platform_interface.dart
├── linux
│   ├── CMakeLists.txt
│   ├── hello_plugin.cc
│   ├── hello_plugin_private.h
│   ├── include
│   │   └── hello_plugin
│   └── test
│       └── hello_plugin_test.cc
├── macos
│   ├── Classes
│   │   └── HelloPlugin.swift
│   └── hello_plugin.podspec
├── pubspec.lock
├── pubspec.yaml
├── test
│   ├── hello_plugin_method_channel_test.dart
│   └── hello_plugin_test.dart
└── windows
    ├── CMakeLists.txt
    ├── hello_plugin.cpp
    ├── hello_plugin.h
    ├── hello_plugin_c_api.cpp
    ├── include
    │   └── hello_plugin
    └── test
        └── hello_plugin_test.cpp

name: hello_plugin
description: A new Flutter plugin project.
version: 0.0.1
homepage:

environment:
  sdk: '>=3.0.5 <4.0.0'
  flutter: ">=3.3.0"

dependencies:
  flutter:
    sdk: flutter
  plugin_platform_interface: ^2.0.2

dev_dependencies:
  flutter_test:
    sdk: flutter
  flutter_lints: ^2.0.0

# 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:
  # This section identifies this Flutter project as a plugin project.
  # The 'pluginClass' specifies the class (in Java, Kotlin, Swift, Objective-C, etc.)
  # which should be registered in the plugin registry. This is required for
  # using method channels.
  # The Android 'package' specifies package in which the registered class is.
  # This is required for using method channels on Android.
  # The 'ffiPlugin' specifies that native code should be built and bundled.
  # This is required for using `dart:ffi`.
  # All these are used by the tooling to maintain consistency when
  # adding or updating assets for this project.
  plugin:
    platforms:
      android:
        package: com.example.hello_plugin
        pluginClass: HelloPlugin
      ios:
        pluginClass: HelloPlugin
      linux:
        pluginClass: HelloPlugin
      macos:
        pluginClass: HelloPlugin
      windows:
        pluginClass: HelloPluginCApi

The method with the same name from the last mixin will override the previous ones in dart

TestMixin file:

class MyObject{
    init(){
        print("draw object");
    }
}

mixin Circle{
    
    init(){
        print("draw circle");
    }
}


mixin Square{
    init(){
        print("draw Square");
    }
}

class MyShape extends MyObject with Circle, Square{
    init() {
        super.init();
        print("draw MyShape");
    }
}


void main() {
    MyShape shape = MyShape();
    shape.init();
}

//Output:

draw Square
draw MyShape