Android的 - 如何加密字符串? [英] Android - how to encrypt a string?
问题描述
我工作的一个Android应用程序,并有一对夫妇的字符串,我想发送到数据库之前进行加密。我想要的东西是安全的,易于实施,每一个它通过了相同的数据时会产生同样的事情,preferably将导致在保持一个固定长度的字符串不管是大的字符串传递给它是。也许我在找一个哈希值。
I am working on an Android app and have a couple strings that I would like to encrypt before sending to a database. I'd like something that's secure, easy to implement, will generate the same thing every time it's passed the same data, and preferably will result in a string that stays a constant length no matter how large the string being passed to it is. Maybe I'm looking for a hash.
推荐答案
这个片段计算MD5任何给定的字符串
This snippet calculate md5 for any given string
public String md5(String s) {
try {
// Create MD5 Hash
MessageDigest digest = java.security.MessageDigest.getInstance("MD5");
digest.update(s.getBytes());
byte messageDigest[] = digest.digest();
// Create Hex String
StringBuffer hexString = new StringBuffer();
for (int i=0; i<messageDigest.length; i++)
hexString.append(Integer.toHexString(0xFF & messageDigest[i]));
return hexString.toString();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return "";
}
来源:<一href="http://www.androidsnippets.com/snippets/52/index.html">http://www.androidsnippets.com/snippets/52/index.html
希望这对您有用。
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