如何在build.gradle中生成apk后运行额外的任务

Question

下面是在build.gradle中添加的，apk仍然不存在，也不起作用。

assembleRelease.doLast {
    android.applicationVariants.all { variant ->
        if (variant.buildType.name == 'release') {
            def releaseBuildTask = tasks.create(name: "debug") {
                project.javaexec {
                    main = "-jar";
                        args = [
                                ""
                        ]
                }
            }
            releaseBuildTask.mustRunAfter variant.assemble
        }
    }
}