您必须将Flutter图标文件替换为您自己的图像。这个网站将帮助你把你的png转换成各种大小的启动器图标:

https://romannurik.github.io/AndroidAssetStudio/icons-launcher.html

最好的方法是分别改变iOS和Android的启动器图标。

分别修改iOS和Android模块的图标。 该插件从相同的图标产生不同大小的图标，这些图标是扭曲的。

点击这个链接: https://flutter.dev/docs/deployment/android

遵循简单的步骤:

1. 添加flutter_launcher_icons Plugin到pubspec.yaml

e.g.

dev_dependencies: 
  flutter_test:
    sdk: flutter

  flutter_launcher_icons: "^0.9.0"

flutter_icons:
  image_path: "icon/icon.png" 
  android: true
  ios: true
  # optionally, as transparency is not allowed on app store
  # remove_alpha_ios: true

2. 为指定的路径准备一个应用程序图标。 例如图标/程序

3.在终端执行命令创建应用图标:

$颤振酒吧得到

$ flutter pub运行flutter_launcher_icons:main

要检查所有可用的选项，并设置不同的图标安卓和iOS，请参考此

更新:

flutter_launcher_icons 0.8.0版本(2020年9月12日)增加了口味支持

flavor通常用于为不同的环境(如dev和prod)构建应用程序

社区写了一些文章和软件包，您可能会觉得有用。这两篇文章分别阐述了iOS和Android的游戏风格。

我建议你使用下面链接的这个网站

应用图标创造者

步骤1:上传图片

步骤2:做必要的修改，然后点击下载(不要更改文件名)

步骤3:解压下载的Zip文件在相应的文件夹

android/app/src/main/res

flutter_launcher_icons: ^ 0.11.0

将此添加到你的pubspec中。yaml文件

dev_dependencies:
  flutter_launcher_icons: "^0.11.0"

flutter_icons:
  android: "launcher_icon"
  ios: true
  image_path: "assets/icon/icon.png"
  min_sdk_android: 21 # android min sdk min:16, default 21
  # optionally, as transparency is not allowed on app store
  # remove_alpha_ios: true

添加后，运行以下命令

$颤振酒吧得到

$ flutter pub运行flutter_launcher_icons:main

遵循以下步骤:-

1. 在pubspec中添加flutter_luncher_icons的依赖项。yaml文件。你可以在这里找到这个插件。

2. 在资产文件夹和pubspec中添加所需的图像。Yaml文件如下。

pubspec.yaml

name: NewsApi.org
description: A new Flutter application.

# The following line prevents the package from being accidentally published to
# pub.dev using `pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev

https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
version: 1.0.0+1

environment:
  sdk: ">=2.7.0 <3.0.0"

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: ^1.0.1
  fluttertoast: ^7.1.6
  toast: ^0.1.5
  flutter_launcher_icons: ^0.8.0




dev_dependencies:
  flutter_test:
    sdk: flutter

flutter_icons:
  image_path: "assets/icon/newsicon.png"
  android: true
  ios: false

# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true
  assets:
    - assets/images/dropbox.png



  fonts:
    - family: LangerReguler
      fonts:
        - asset: assets/langer_reguler.ttf




  # fonts:
  #   - 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/custom-fonts/#from-packages

3.执行terminal flutter pub get命令，然后执行flutter_luncher_icon命令。这是成功运行命令后得到的结果。并成功生成了午餐图标。

我的终端

[E:\AndroidStudioProjects\FlutterProject\NewsFlutter\news_flutter>flutter pub get
Running "flutter pub get" in news_flutter...                       881ms

E:\AndroidStudioProjects\FlutterProject\NewsFlutter\news_flutter>flutter pub run flutter_launcher_icons:main
  ════════════════════════════════════════════
     FLUTTER LAUNCHER ICONS (v0.8.0)
  ════════════════════════════════════════════

• Creating default icons Android
• Overwriting the default Android launcher icon with a new icon

✓ Successfully generated launcher icons