摇篮：我怎么包括一个依赖Java项目在Android构建一个本地罐子？ [英] Gradle: how do I include a local jar from a dependent java project in an Android build?

问题描述

在我的Andr​​oid应用程序，我得到一个 java.lang.NoClassDefFoundError的执行code，引用code在相关的.jar时。我的项目包括机器人模块，以及一个纯Java的库模块，这是那里的罐子依赖性。我使用的摇篮1.10来构建项目。这里是我的项目布局：

In my Android app, I'm getting a java.lang.NoClassDefFoundError when the code that references code in a dependent .jar is executed. My project includes an Android module as well as a java-only library module, which is where the jar dependency is. I'm using gradle 1.10 to build the project. Here is my project layout:

myProject
- app (Android)
  - src
  - build.gradle

- lib (java)
  - src     
  - libs
    - local-dependency.jar
  - build.gradle

- build.gradle
- settings.gradle

主要项目 build.gradle 是空白，而主体工程 settings.gradle 是这样的：

The main project build.gradle is blank while the main project settings.gradle looks like:

include ':app', ':lib'

Android应用 build.gradle 是这样的：

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.8.+'
    }
}

apply plugin: 'android'

repositories {
    mavenCentral()
}

android {
    compileSdkVersion 18
    buildToolsVersion "19.0.2"

    defaultConfig {
        minSdkVersion 18
        targetSdkVersion 18
        versionCode 1
        versionName "1.0"
    }
}

dependencies {
    compile project(':lib')
}

库 build.gradle 是：

apply plugin: 'java'

repositories {
    mavenCentral()
}

dependencies {
    compile <some-dependency-in-maven>
    compile files('libs/local-dependency.jar') 
}

一切都编译并没有错误的包，我没有看到在IDE中的任何错误（的IntelliJ 13）。出于某种原因，我的本地dependency.jar 是没有得到Android的编译过程中加入地塞米松，荷兰国际集团的过程。在 LIB 项目指定的任何Maven依赖被添加到Android的apk文件就好了;这只是我的本地JAR依赖。是否有什么我失踪？

Everything compiles and packages with no errors and I'm not seeing any errors in the IDE (IntelliJ 13). For some reason, my local-dependency.jar is not getting added to the dex-ing process during the Android compile. Any maven dependencies specified in the lib project get added to the Android .apk just fine; it's just my local jar dependency. Is there something I'm missing?

谢谢！

推荐答案

这是不能直接为当地的罐子不声明为在摇篮传递依赖。

This is not directly possible as local jars are not declared as transitive dependencies in Gradle.

您有两种选择：

• 合并两个罐子在Java库，以便输出包含本地罐子。
• 创建一个不同的项目，没有源代码，只是罐子，使项目依赖于它。

第二个选项让你有直接多个项目取决于当地瓶的能力（在它的上面成为一个传递依赖）。要做到这一点，创建一个新的摇篮的项目，只是把它 build.gradle 如下：

The second option gives you the ability to have more than one project depend directly on the local jar (on top of it becoming a transitive dependency). To do it, create a new gradle project and just put in its build.gradle the following:

configurations.create("default")
artifacts.add("default", file('somelib.jar'))

这只是注册的水瓶中的项目发布的默认神器，这将在其它项目得到消耗。

This simply register your jar as the default artifact published by the project and this will get consumed by the other projects.

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