for zip

    private void zip(ZipOutputStream out, File file, String base) {
        try {
            if (file.isDirectory()) {
                File[] subFiles = file.listFiles();
                if (subFiles.length == 0) {
                    out.putNextEntry(new ZipEntry(base + "/"));
                }

                for (int i = 0; i < subFiles.length; i++) {
                    zip(out, subFiles[i], base + "/" + subFiles[i].getName());
                }
            } else {
                out.putNextEntry(new ZipEntry(base));
                FileInputStream in = new FileInputStream(file);
                BufferedInputStream bi = new BufferedInputStream(in);
                int size;
                while ((size = bi.read()) != -1) {
                    out.write(size);
                }
                out.closeEntry();
                in.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        final String module = "VtsVndkDependencyTest";
        VTS vts = new VTS(module);
        String result = vts.runVTS();
        System.out.println("test result:" + result);
        System.out.println("LOG:" + module + COMPRESS_POSTFIX_NAME);
    }