参考html
Android secure encrypted SharedPreferences example Tutorial http://www.tutorialsface.com/2015/09/android-secure-encrypted-sharedpreferences-example-tutorial/ Android 加解密类Cipher http://blog.csdn.net/kyoky_xxj/article/details/9229013 Base64编码及其做用 http://blog.csdn.net/benbenxiongyuan/article/details/7756912 Cipher类 http://book.2cto.com/201312/37681.html MessageDigest简介 http://blog.csdn.net/hudashi/article/details/8394158 SecureRandom简介 http://swiftlet.net/archives/1352