Jar files in libs folder are not used in Android G

问题:

i just started to play with the gradle build system for Android.

However i'm not able build one of my projects. It depends on a jar in the libs/ folder.

Doing gradle build fails in the compileDebug task because all of the classes from the jar file are missing.

It is a library project! Here is my build.gradle file:

buildscript {
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:0.2'
    }
}

apply plugin: 'android-library'

android {
    target='android-16'
    sourceSets {
        main {
            manifest {
                srcFile 'AndroidManifest.xml'
            }
            java {
                srcDir 'src'
            }
            res {
                srcDir 'res'
            }
            assets {
                srcDir 'assets'
            }
            resources {
                srcDir 'src'
            }
        }
    }
}

Am i missing something obvious?

Goddchen

回答1:

just found the answer myself:

Seems like the current version of the Android Gradle plugin doesn't look for jars in the libs/ folder. So you have to add them yourself:

dependencies {
    compile files('libs/mylib.jar')
}

or

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

Place this within the android namespace like this:

android {
    target = "android-15"

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

回答2:

Just in case none of the solutions worked for you, you may want to try to provide the path to the *.jar manually:

compile files('../<your-library-folder>/<your-library>.jar')

The '../' part means that Gradle will search for the library starting from the root projects folder (not app module).