android解压zip

private static String aikitPathReal = "/obb/";
private static String aikitPathInData = "";

File sdDir = new File(mContext.getFilesDir(), aikitPathReal);///data/user_de/0/org.cocos2d.demo/files/obb/
aikitPathInData = sdDir.getAbsolutePath() + "/";
if (FileUtils.isDirectoryEmpty(aikitPathInData)) {
    FileUtils.createDirectory(aikitPathInData);

    try {
        FileUtils.copyFiles(mContext, "xtts", aikitPathInData);

        FileUtils.unZip(aikitPathInData+"/assets.obb");

        System.out.print("--------2--------");
    } catch (IOException e) {
        e.printStackTrace();
    }
} else {
    System.out.print("------1----------");
}

public static void unZip(String SourceDir) throws IOException {
    unZip(SourceDir, new File(SourceDir).getParent(), "");
}

public static void unZip(String SourceDir, String extDir) throws IOException {
    unZip(SourceDir, extDir, "");
}

public static void unZip(String SourceDir, String extDir, String fileExt) throws IOException {
    ZipFile zip = new ZipFile(SourceDir);
    Enumeration entries = zip.entries();
    while (entries.hasMoreElements()) {
        ZipEntry entry = entries.nextElement();
        String name = entry.getName();
        if (!name.startsWith(fileExt)) continue;
        String path = name;
        if (entry.isDirectory()) {
            File f = new File(extDir + File.separator + path);
            if (!f.exists()) f.mkdirs();
        } else {
            String fname = extDir + File.separator + path;
            File temp = new File(fname).getParentFile();
            if (!temp.exists()) {
                if (!temp.mkdirs()) {
                    throw new RuntimeException("create file " + fname + temp.getName() + " fail");
                }
            }
            try {
                path = path.replaceAll("[\r\n]", "");
                FileOutputStream out = new FileOutputStream(extDir + File.separator + path);
                InputStream in = zip.getInputStream(entry);
                byte[] buf = new byte[8 * 1000];
                int count = 0;
                while ((count = in.read(buf)) != -1) {
                    out.write(buf, 0, count);
                }
                out.close();
                in.close();
            } catch (Exception e) {
                e.printStackTrace();
            }

        }
    }
    zip.close();
    //AppActivity.downloadFileLanguageOver();
}