Flutter：打包apk，安卓版本更新（二）

在Flutter：打包apk，详细图文介绍（一）基础上，实现安卓端的版本更新功能。

1、把自己的demo文件复制到空项目中
2、生成APP图标：dart run icons_launcher:create
3、生成启动图：dart run flutter_native_splash:create
只是查看怎么在安卓端更新apk可忽略1-3步骤，

这些是安装更新需要用到的依赖
# apk安装插件
app_installer: ^1.3.1
# 获取安装包路径
path_provider: ^2.1.5
# 接口请求
dio: ^5.7.0

pubspec.yaml

name: demo
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.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: 1.0.0+1

environment:
  sdk: ^3.5.4

# 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# versions available, run `flutter pub outdated`.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

  # 多语言开启
  flutter_localizations:
    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
  # 状态管理
  get: ^4.6.6
  # apk安装插件
  app_installer: ^1.3.1
  # 获取安装包路径
  path_provider: ^2.1.5
  # 包信息
  package_info_plus: ^8.1.1
  # 离线存储
  shared_preferences: ^2.3.3
  # 接口请求
  dio: ^5.7.0
  # 猫哥封装基础组件，已包含配模适配ScreenUtil插件，可直接设置宽高.w,字体大小.sp
  ducafe_ui_core: ^1.0.4
  # 图片缓存
  cached_network_image: ^3.4.1
  # svg
  flutter_svg: ^2.0.16
  #轮播
  carousel_slider: ^5.0.0
  # ui
  tdesign_flutter: ^0.1.7
  # 下拉刷新
  pull_to_refresh_flutter3: ^2.0.2
  # 加载动画
  flutter_easyloading: ^3.0.5
  # 城市选择
  city_pickers: ^1.3.0
  # 徽章
  badges: ^3.1.2
  # 主题切换
  adaptive_theme: ^3.6.0
  # 图片、视频选取
  extended_image: ^8.3.1
  #  wechat_assets_picker: ^9.3.2
  #  wechat_camera_picker: ^4.3.2
  # 图片预览
  photo_view: ^0.15.0
  # 网页
  #  webview_flutter: ^4.10.0
  # 二维码
  qr_flutter: ^4.1.0
  # 二维码扫描
  mobile_scanner: