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

上面许多答案中推荐的flutter_launcher_icons包现在已经有一段时间没有更新了，并且正在抛出一个未捕获的异常。

你也可以使用icons_launcher包。

更新pubspec.yaml

dev_dependencies:
  icons_launcher: ^1.1.7

flutter_icons:
  image_path: 'assets/ic_logo_border.png'
  ios: true
  android: true

运行包

flutter pub get
flutter pub run icons_launcher:main

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

在Flutter中设置应用程序图标的最佳推荐方法。

我找到了一个插件来设置应用程序图标在flutter名为flutter_launcher_icons。我们可以使用这个插件在flutter中设置应用程序图标。

在pubspec中添加此插件。项目根目录下的Yaml文件。请检查以下代码，

dependencies:    
 flutter:    
  sdk: flutter    
 cupertino_icons: ^0.1.2    
 flutter_launcher_icons: ^0.7.2+1**    

保存文件并在终端上运行flutter pub get。

在项目的根文件夹资产中创建一个文件夹资产，同时创建一个文件夹图标，并将应用程序图标放在这个文件夹中。我将推荐给用户1024x1024的应用程序图标大小。我已经把应用程序图标放在图标文件夹内，现在我有应用程序图标路径为assets/icon/icon.png 现在，在pubspec中。Yaml添加下面的代码，

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

保存文件并在终端上运行flutter pub get。运行命令后，运行第二条命令，如下所示

flutter pub run flutter_launcher_icons:main -f pubspec.yaml 

然后运行App

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

我使用很少的方法来更换颤振应用程序lancher图标，但只有手动方法是有点容易和好。因为你会知道它是如何运作的。

更改flutter ios图标。首先得到你的图标1024×1024像素的副本，并生成一组图标的android和ios使用appicon。有限公司发电机。 当你得到压缩文件，它工作创建两个文件夹ios和android打开ios文件夹和复制文件夹，并替换一个在你的ios/runner目录。

对于android，复制android文件夹中的所有文件夹，并替换在android/app/src/main/res/drawable中的文件夹。

在ios和android上替换文件夹后，停止应用程序并重新运行，您的图标将被更改。