Gradle:如何从 JScience jar 依赖项中排除 javax.realtime 包(多个 dex 定义)

问题描述

我在我的 Android 应用程序中使用 Gradle，我想使用 JScience 库依赖项.我以这种方式添加了库:

I'm using Gradle in my Android application an I would like to use the JScience library dependency. I have added the library this way:

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

    compile 'org.jscience:jscience:4.3.1'

    testCompile group: 'junit', name: 'junit', version: '4.11'
}

但在编译时出现错误:

UNEXPECTED TOP-LEVEL EXCEPTION:
com.android.dex.DexException: Multiple dex files define Ljavax/realtime/MemoryArea;
    at com.android.dx.merge.DexMerger.readSortableTypes(DexMerger.java:594)
    at com.android.dx.merge.DexMerger.getSortedTypes(DexMerger.java:552)
    at com.android.dx.merge.DexMerger.mergeClassDefs(DexMerger.java:533)
    at com.android.dx.merge.DexMerger.mergeDexes(DexMerger.java:170)
    at com.android.dx.merge.DexMerger.merge(DexMerger.java:188)
    at com.android.dx.command.dexer.Main.mergeLibraryDexBuffers(Main.java:439)
    at com.android.dx.command.dexer.Main.runMonoDex(Main.java:287)
    at com.android.dx.command.dexer.Main.run(Main.java:230)
    at com.android.dx.command.dexer.Main.main(Main.java:199)
    at com.android.dx.command.Main.main(Main.java:103)

这是因为在项目中复制了javax.realtime包，一个是JDK的一部分，一个是Jscience库的一部分.我试图在 Gradle 中以这种方式从 Jscience 库中删除这个包:

This is caused because of duplicating javax.realtime packages in project, one is a part of JDK, and the second one is in the Jscience library. I have tried to remove this package from Jscience library this way in Gradle:

sourceSets {
    main {
        java {
            exclude 'javax/realtime/**'
        }
    }
}

configurations {
    all*.exclude group: 'javax.realtime'
}

但这并没有帮助.因此，该包仍然存在于依赖项中.

But that didn't help. So, that package is still exists in dependencies.

有什么方法可以在编译时从 jar 中排除一个包?

Is there any way how I can exclude a package from jar on compile time?

推荐答案

如果有人需要，问题出在 JScience 库的 Javolution 依赖项中.他们都有一个 javax.runtime 包.排除 Javolution 为我解决了这个问题.

In case anybody needed, the problem was in Javolution dependency from JScience library. They both do hava a javax.runtime package. Excluding the Javolution has fixed the issue for me.

compile ('org.jscience:jscience:4.3.1') {
    exclude group: 'org.javolution', module: 'javolution'
}

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