1、对文件夹批量重命名，达到加密解密的效果。
我们知道android手机如果修改图片后缀名，将不能预览，不能打开。但是如果对文件加密的话，速度很慢，加密原来遇到读取后加密再生产（基本上一个文件1秒），但我们手机里面图片可能有1000张呢！！所以通过重命名方式的话，100个文件，1000个文件，也就几秒钟的事。
注： android 4.0以上版本不能运行
| 熱門國家 | 系統支援 | 版本 | 費用 | APP評分 | 上架日期 | 更新日期 |
|---|---|---|---|---|---|---|
| 中國 China | Android Google Play | 2.0 App下載 | 免費 | 2013-01-29 | 2014-09-18 |
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