AndroidStudio3.6.1打包jar及AndroidStudio4.0打包jar的一系列问题及用法

//Copy类型，请在Terminal中运行gradlew makeJar
task makeJar(type: Copy) {
  //删除存在的
  delete 'build/libs/' + jarName + ".jar"
  //设置拷贝的文件
  from("build/intermediates/aar_main_jar/release")
  //打进jar包后的文件目录,将classes.jar放入build/libs/目录下
  into('build/libs/')
  //要打包的jar文件
  include('classes.jar')
  //重命名
  rename('classes.jar', jarName + ".jar")
}
makeJar.dependsOn(build)

def jarName = "utils1.0"

//Copy类型，请在Terminal中运行gradlew makeJar
task makeJar(type: Copy) {
  //删除存在的
  delete 'build/libs/' + jarName + ".jar"
  //设置拷贝的文件
  from("build/intermediates/aar_main_jar/release")
  //打进jar包后的文件目录,将classes.jar放入build/libs/目录下
  into('build/libs/')
  //要打包的jar文件
  include('classes.jar')
  //重命名
  rename('classes.jar', jarName + ".jar")
}
makeJar.dependsOn(build)

//-encoding UTF-8 -charset UTF-8
tasks.withType(JavaCompile) {
  options.encoding = "UTF-8"
}

// 生成jar包的sourcesJar，不需要修改。
task sourcesJar(type: Jar) {
  from android.sourceSets.main.java.srcDirs
  classifier = 'sources'
  archiveName = jarName + '-sources.jar'
}

//生成jarDoc的task，不需要修改。
task javadoc(type: Javadoc) {
  failOnError false
  source = android.sourceSets.main.java.srcDirs
  options.encoding = "UTF-8"
  classpath += project.files(android.getBootClasspath().join(File.pathSeparator))
  classpath += configurations.compile
}

// 生成javaDoc的jar，不需要修改。
task javadocJar(type: Jar, dependsOn: javadoc) {
  group = 'jar'
  classifier = 'javadoc'
  from javadoc.destinationDir
  archiveName = jarName + '-javadoc.jar'
}

task generateJavadoc(type: Javadoc) {
  source = android.sourceSets.main.java.srcDirs
  ext.cp = android.libraryVariants.collect { variant - 
    variant.javaCompile.classpath.files
  }
  classpath = files(ext.cp)
}
artifacts {
  archives sourcesJar
  archives javadocJar
}