如何在不公开源代码的情况下使用 gradle 创建 Android Library Jar? [英] How to create an Android Library Jar with gradle without publicly revealing source code?

问题描述

我想用一个 Android 库项目创建一个 Jar.它的设置方式如下:

I would like to create a Jar out of an Android library project. It is set up the following way:

ProjectName
    \- lib
    |   \- lib
    |       \- armeabi
    |           \- libNativeFirst.so
    |           \- libNativeSecond.so
    \- src
        \- main
            \- java
                \- com.package.sdk
                    \- PackageSDK.java

我希望所有这些都打包在一个 Jar 中，但不透露 PackageSDK.java 中的源代码.

I would like for all of this to be packaged in a Jar, but without revealing the source code present in PackageSDK.java.

我像这样设置我的 build.gradle 文件:

I set up my build.gradle file like so:

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.5.+'
    }
}

apply plugin: 'android-library'

repositories {
    mavenCentral()
}

android {
    compileSdkVersion 18
    buildToolsVersion "18.0.1"

    defaultConfig {
        minSdkVersion 10
        targetSdkVersion 18
    }

    sourceSets {
        main {
            java {
                srcDir 'src/main/java'
            }
            resources {
                srcDir 'src/../lib'
            }
        }
    }
}

task jar(type: Jar) {
    from android.sourceSets.main.allSource
}

当我在项目目录中运行 gradlew clean jar 时，会在 ProjectName\build\libs 中创建一个名为 ProjectName.jar 的 Jar 文件.其结构如下:

When I run gradlew clean jar in the project's directory, a Jar file is created in ProjectName\build\libs called ProjectName.jar. It's structure is as follows:

ProjectName.jar
    \- lib
    |   \- armeabi
    |       \- libNativeFirst.so
    |       \- libNativeSecond.so
    \- com
        \- package
            \- sdk
                \- PackageSDK.java

我希望在执行 jar 任务时包含已编译的 PackageSDK.class 而不是 PackageSDK.java 文件.我可以改变什么来实现这一目标?

I would like for the compiled PackageSDK.class to be included instead of the PackageSDK.java file when executing the jar task. What can I change to achieve this?

根据 Ben Manes 的建议，我将 sourceSets 的配置更改为以下内容:

Per Ben Manes's suggestion, I changed the configuration of the sourceSets to the following:

sourceSets {
    main {
        java {
            srcDir 'src/main/java'
        }
        resources {
            srcDir 'src/../lib'
        }
        output {
            classesDir 'build/classes'
            resourcesDir 'build/javaResources'
        }
    }
}

和jar任务如下:

task jar(type: Jar) {
    from android.sourceSets.main.output
}

Gradle 现在给我这个输出:

Gradle is now giving me this output:

在源集 main 上找不到参数 [build_25r1m0a3etn5cudtt5odlegprd$_run_closure2_closure9_closure10_closure13@138532dc] 的方法 output().

推荐答案

注意: 答案已被编辑.请参阅下面的 07/28/2014 更新.

Note: The answer has been edited. Please see the 07/28/2014 update below.

这是我最终想出的解决方案.可能有更好的方法，但我还没有找到.

Here is a solution I ended up coming up with. There may be a better way available, but I have not found it yet.

android {
    compileSdkVersion 18
    buildToolsVersion "18.0.1"

    defaultConfig {
        minSdkVersion 10
        targetSdkVersion 18
    }

    sourceSets {
        main {
            java {
                srcDir 'src/main/java'
            }
            resources {
                srcDir 'src/../lib'
            }
        }
    }
}

task clearJar(type: Delete) {
    delete 'build/libs/ProjectName.jar'
}

task makeJar(type: Copy) {
    from('build/bundles/release/')
    into('build/libs/')
    include('classes.jar')
    rename ('classes.jar', 'ProjectName.jar')
}

makeJar.dependsOn(clearJar, build)

运行 gradlew makeJar 在 build/libs 目录中创建一个 ProjectName.jar.这个jar的结构如下:

Running gradlew makeJar creates a ProjectName.jar in the build/libs directory. The structure of this jar is as follows:

ProjectName.jar
    \- lib
    |   \- armeabi
    |       \- libNativeFirst.so
    |       \- libNativeSecond.so
    \- com
        \- package
            \- sdk
                \- PackageSDK.class

这正是我需要的结果.我现在可以在其他项目中成功使用 ProjectName.jar.

This is the exact result I needed. I am now able to use ProjectName.jar successfully in other projects.

虽然我能够在 Android Studio 中的项目中使用生成的 jar，但我无法在 ADT 中创建的项目中这样做，因为关于 jar 文件中存在本机代码的警告.据说有一个标志可以关闭此检查设置，但它无法正常工作.因此，如果要创建使用本机代码的库，使用 ADT 的人必须手动将 armeabi 目录复制到 libs/中.

While I am able to use the resulting jar in projects within Android Studio, I cannot do so in projects created in ADT due to a warning about native code being present inside a jar file. Supposedly there is a flag to turn off this check in settings, but it does not function correctly. Thus, if you want to create a library that uses native code, those using ADT will have to manually copy the armeabi directory into libs/.

从 Android Studio 0.8.0 开始，Gradle 输出目录已更改，上述配置将不起作用.我已将配置更改为以下内容:

As of Android Studio 0.8.0, Gradle output directories have been changed and the configuration outlined above will not work. I have changed my configuration to the following:

task clearJar(type: Delete) {
    delete 'build/outputs/ProjectName.jar'
}

task makeJar(type: Copy) {
    from('build/intermediates/bundles/release/')
    into('build/outputs/')
    include('classes.jar')
    rename ('classes.jar', 'ProjectName.jar')
}

重要提示:请注意，ProjectName.jar 现在将被放入 build/outputs/ 而不是 build/libs/.

IMPORTANT: Please note that ProjectName.jar will now be placed into build/outputs/ and NOT into build/libs/.

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