根据官方的flutter文档，您只需要在app/build中更改ApplicationId。gradle目录。然后你只需要构建你的apk, manifest文件的包名将根据你在build.gradle中更改的ApplicationId进行更改。由于在构建apk和谷歌播放时的颤扑，都考虑从build.gradle中的ApplicationId。这个解决方案对我很有效。

来源:官方文件

我有两个manifest.xml文件在我的应用程序部分，所以我需要改变包的名称

在Vs Code，我所做的是搜索和替换它，它工作!就像一个符咒。

com.example.appName

重新启动vs代码。

首先，在终端中运行这个程序 Dart pub全局激活重命名 在Flutter项目根目录中运行此命令 bundleId .company.appname——目标android

这就是所有的东西，现在你改变了你的包名:)

即使我的答案不会被接受为正确答案，我只是觉得所有这些答案导致我有更多的问题，这里是我如何解决它

Get Sublime Text (crazy, right? No, just follow my steps) Click on file and select open folder, then choose the folder of the project you are working on Now click on Find from the Tabs, and select find in files or just do Ctrl + Shift + F (for Windows users, for mac users you already know the drill) Now copy and paste exactly the name of the package you want to change in the Find section and paste in the replace section what you would like to replace the package name with. Click on FIND (do not click on REPLACE just yet). Now clicking on Find lists all available package name in your project which matches your search criteria, if you are satisfied with this then repeat from no. 3 but this time click on REPLACE. Rebuild your project and have fun

结论:一个简单的查找和替换程序就可以解决这个问题，我强烈推荐Sublime Text 3。

尽可能简单地使用这个change_app_package_name包首先添加依赖

 dev_dependencies: 
  change_app_package_name: lates version

然后执行这个命令

flutter pub run change_app_package_name:main com.new.package.name