@kangwang1988
Thank you for this fix!
Are you going to update wiki?

Currently, hard coded resource copy can't handle the case when developers use a Application module with name other than 'app'.
This will fix: #26948
Besides,
wiki: https://github.com/flutter/flutter/wiki/Add-Flutter-to-existing-apps
should be updated when this fix is finally landed if possible.

include ':example'
setBinding(new Binding([gradle: this, mainModuleName: 'example']))// new
evaluate(new File(                                                      // new
        settingsDir.parentFile,                                               // new
        'my_flutter/.android/include_flutter.groovy'                          // new
))// new

If I have multiple modules under one project, this still can't meet my needs. Only the last sentence (setBinding) will take effect.

include ':aaa'
include ':bbb'
include ':ccc'

setBinding(new Binding([gradle: this, mainModuleName: 'aaa']))// new
setBinding(new Binding([gradle: this, mainModuleName: 'bbb']))// new
setBinding(new Binding([gradle: this, mainModuleName: 'ccc']))// new

evaluate(new File(                                                      // new
         settingsDir.parentFile,                                               // new
         'my_flutter/.android/include_flutter.groovy'                          // new
 ))// new

Only the last sentence( ccc) takes effect
How can I configure these three modules?

如果我一个工程里有多个APP共用一个flutter lib ,我只能在 settings.gradle 配置一个APP去依赖flutter,如何才能让三个APP都能成功依赖那一个flutter

It is changed back in the stable branch, very strange.

Project appProject = project.rootProject.findProject(':app') // Stable channel