build.gradle

// Top-level build file where you can add configuration options common to all sub-projects/modules.
buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:1.2.3'
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

apply plugin: 'java'

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

sourceSets {
    main {
        java {
            srcDir 'src'
        }
    }
}

[compileJava, compileTestJava]*.options*.encoding = 'UTF-8'

jar {
    manifest {
        attributes 'Main-Class': new File('MANIFEST.MF').getText('UTF-8').split('\n')[1].split(": ")[1]
    }
}
archivesBaseName = 'resourcesproguard'

// 把jar包复制到目标目录
task buildJar(type: Copy, dependsOn: [build, jar]) {
    from('build/libs') { // 复制jar包
        include '*.jar'
    }
    into ('work')
}