public static ZipResourceFile getObbFile() {
    if (null == sOBBFile) {

        int versionCode = 1;
        try {
            versionCode = Cocos2dxActivity.getContext().getPackageManager().getPackageInfo(Cocos2dxHelper.getCocos2dxPackageName(), 0).versionCode;
        } catch (NameNotFoundException e) {
            e.printStackTrace();
        }

        try {
            String pathToOBB = sActivity.getObbDir().toString();

            String[] fileNames = new File(pathToOBB).list(new FilenameFilter() {
                public boolean accept(File dir, String name) {
                    return name.startsWith("main.") && name.endsWith(".obb");
                }
            });

            if (fileNames.length > 0) {
                versionCode = Integer.parseInt(fileNames[0].split("\\.")[1]);
            }

            sOBBFile = APKExpansionSupport.getAPKExpansionZipFile(Cocos2dxActivity.getContext(), versionCode, 0);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    return sOBBFile;
}