如何将外部库和嵌套的外部库添加到android项目？

我的项目结构（不允许更改）

• 应用/
  • App1 /
  • build.gradle
  • settings.gradle
  • 图书馆/
  • 图书馆1 /
    • 建立等级
    • settings.gradle
  • 图书馆2 /
    • 建立等级
    • settings.gradle
  • 图书馆3 /
    • 建立等级
    • settings.gradle
  • 图书馆4 /
    • 建立等级
    • settings.gradle

应用1

App1 / build.gradle

buildscript {
    ...
}

apply plugin: 'android'

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
    compile project(':..:libraries:library1')
    compile project(':..:libraries:library2')
    compile project(':..:libraries:library3')
    compile project(':..:libraries:library4')
}

android {
    ...
}

App1不直接依赖library3或library4，但是，如果我不在build.gradle文件和settings.gradle文件的依赖项中包括它们，它将抱怨。所以，我让他们加入只是为了阻止它抱怨。

App1 / settings.gradle

include ':'
include '..:libraries:library1'
include '..:libraries:library2'
include '..:libraries:library3'
include '..:libraries:library4'

图书馆1

library1 / build.gradle

buildscript {
    ...
}

apply plugin: 'android-library'

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
    compile project(':..:library3')
    compile project(':..:library4')
}

android {
    ...
}

library1 / settings.gradle

include ':'
include '..:library3'
include '..:library4'

图书馆2..4

library2..4 / build.gradle

buildscript {
    ...
}

apply plugin: 'android-library'

dependencies {
    compile fileTree(dir: 'libs', include: '*.jar')
}

android {
    ...
}

library2..4 / settings.gradle

include ':'

当试图gradlew clean build在App1我得到以下错误：

FAILURE: Build failed with an exception.

* Where:
Build file '/home/user/projects/branches/branch1/Apps/libraries/library1/build.gradle' line: 15

* What went wrong:
A problem occurred evaluating project ':..:library:library1'.
> Project with path ':..:library3' could not be found in project ':..:library:library1'.

线15 compile project(':..:library3')中library1/build.gradle的文件。

如何将外部库和嵌套的外部库添加到android项目？