问题描述

我想根据当前的 buildType 在 Android Gradle 项目中动态添加依赖项.我知道我可以在依赖项中指定 buildType:

I want to dynamically add a dependency in an Android Gradle project based on the current buildType. I know I can specify the buildType in the dependency:

compile project(path: ':lib1', configuration: 'debug')

但是如何使用当前的 buildType 来指定我要导入的库的哪个变体，以便调试或发布版本自动导入库的调试或发布变体?我想要的是这样的(其中 currentBuildType 是一个包含当前使用的 buildType 名称的变量):

But how can I use the current buildType to specify which variant of the library I want to import, so that a debug or release build automatically imports the debug or release variant of the library? What I want is something like this (where currentBuildType is a variable containing the name of the currently used buildType):

compile project(path: ':lib1', configuration: currentBuildType)

我要导入的库项目设置了publishNonDefault true，所以所有的buildTypes都被发布了.

The library project I want to import has set publishNonDefault true, so all buildTypes are published.

推荐答案

我在 Gradle 的配置阶段找不到一个干净的方法来获取当前的构建类型.相反，我像这样分别定义每种构建类型的依赖关系:

I could not find a clean way to get the current build type during the configuration phase of Gradle. Instead I define the dependency for each build type separately like that:

debugCompile project(path: ':lib1', configuration: 'debug')
releaseCompile project(path: ':lib1', configuration: 'release')

如果您有许多构建类型和许多项目依赖项，这可能会变得非常冗长，但可以添加一个函数以使依赖项成为单行.您需要将此添加到您的主要 Gradle 构建文件中:

If you have many build types and many project dependencies this can get very verbose, but it is possible to add a function to make the dependency a one-liner. You need to add this to your main Gradle build file:

subprojects {
    android {
        dependencies.metaClass.allCompile { dependency ->
            buildTypes.each { buildType ->
                "${buildType.name}Compile" project(path: ":${dependency.name}", configuration: buildType.name)
            }
        }
    }
}

然后您可以像这样在 Gradle 模块中添加项目依赖项:

Then you can add project dependencies in your Gradle modules like this:

allCompile project(':lib1')

如果您还使用构建风格，则必须调整解决方案.有关该功能的文档，请参阅此链接:http://tools.android.com/tech-docs/new-build-system/user-guide#TOC-Library-Publication

If you also use build flavors you would have to adapt the solution. See this link for a documentation of the feature: http://tools.android.com/tech-docs/new-build-system/user-guide#TOC-Library-Publication

请注意，Android 团队正在努力改进此行为:https://code.google.com/p/android/issues/detail?id=52962

Please note that the Android team is working on an improvement for this behaviour: https://code.google.com/p/android/issues/detail?id=52962

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