模块依赖 - Android Studio

问题描述

我在我的项目M1，M2下有2个模块

 项目
  -  M1 
  - M2 
  

之前，我有M1作为我的主要应用程序。但是，需要新的应用程序M2，它与M1共享很多常见的东西。所以，我创建了一个具有M1依赖性的新模块M2。

为了达到这个目的，我修改了M1和M2的build.gradle，如下所示：

$ b M2：

  compile project（'：M1 '）
  

M1：（更改为库）

  apply plugin：'com.android.library'
  

然而，这不起作用并抛出错误：

 找不到属性'applicationVariants 'on com.android.build.gradle.LibraryExtension_Decorated@6de81701。 
  

任何想法，关于如何解决这个问题？

$ b

为了为了解决这个问题，android对象有两个属性：
$ b $ applicationVariants（仅用于应用程序插件）

libraryVariants （仅适用于库插件）
$ b $ testVariants（对于两个插件）

这三个函数都返回ApplicationVariant的DomainObjectCollection ，LibraryVariant和TestVariant对象。

所以看起来你的build.gradle在M1中使用不适用于库项目的属性 applicationVariants 。因为我不知道你在做什么，我只能猜测你需要（1）用 libraryVariants 替换它，或者（2）将它移动到构建版本。 M2的gradle。

I've 2 modules under my project M1, M2

Project
  - M1
  - M2

Earlier, I had M1 as my primary application. However, there was a need for new application M2 that shared lot of common stuff with M1. So, I created a new module M2 with M1 as dependency.

To achieve this, I've modified build.gradle of M1 and M2 as follows:

M2:

compile project(':M1')

M1: (Changed to library)

apply plugin: 'com.android.library'

However, this doesn't work and throws up error:

Could not find property 'applicationVariants' on com.android.build.gradle.LibraryExtension_Decorated@6de81701.

Any idea, on how to solve this issue ?

解决方案

From the docs:

In order to fix this, the android object has two properties:

applicationVariants (only for the app plugin)

libraryVariants (only for the library plugin)

testVariants (for both plugins)

All three return a DomainObjectCollection of ApplicationVariant, LibraryVariant, and TestVariant objects respectively.

http://tools.android.com/tech-docs/new-build-system/user-guide

So it seems that your build.gradle in M1 uses the property applicationVariants which is not applicable to library projects. Since I don't know what you are doing exactly I can just guess that you either need to (1) replace that with libraryVariants or (2) move it to the build.gradle of M2.

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