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Flutter开发初识目录结构

news 2025/8/3 7:41:54

初识目录结构

在这里插入图片描述
.dart_tool:记录dart工具库所在位置及信息的json文件和一些dart编译文件。
.idea：存放IDE生成的一些临时文件
android：存放flutter与android原生交互的一些代码
build：存放运行时生成的编译文件
ios：存放flutter与ios原生交互的一些代码
lib：存放的dart语言编写的代码
test：存放项目测试代码文件
pubspec.yaml：用于管理第三方依赖库及资源的配置文件

主要文件介绍

main.dart 入口文件

import 'package:flutter/material.dart'; //导入包void main() {//入口函数runApp(const MyApp());
}class MyApp extends StatelessWidget { //无状态的const MyApp({super.key});// This widget is the root of your application.@overrideWidget build(BuildContext context) {return MaterialApp(title: 'Flutter Demo', //任务管理窗口中显示的应用程序标题theme: ThemeData(//主题colorScheme: ColorScheme.fromSeed(seedColor: Colors.red),),home: const MyHomePage(title: 'Flutter Demo Home Page222'), //应用程序默认显示的控件);}
}

pubspec.yaml

name: first_flutter
description: "A new Flutter project."
# 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.devversion: 1.0.0+1 #应用程序版本号environment:sdk: ^3.8.1   #适配的版本号
#依赖管理，第三方插件
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  #ios样式的图标库#dependency_overrides:
#  path_provider:
#    hosted:
#      url: "https://mirrors.tuna.tsinghua.edu.cn/dart-pub/"#开发时需要的依赖包，不会包含在发布的包中
dev_dependencies:flutter_test:sdk: flutter# 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: ^5.0.0# 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:uses-material-design: true  #是否使用material design# To add assets to your application, add an assets section, like this:
#项目使用的资源文件（图片、字体、JSON等）
#   assets:   #资源文件
#     - images/a_dot_burr.jpeg
#     - images/a_dot_ham.jpeg# fonts:  #字体#   - 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