MD5 and SHA1 encryption examples in Android development

First, let's share the functions of MD5 and SHA1 encryption.

public class MD5 {

private static String key = "a6u&1$ip[jr/sed]rfvn=o>mz+}lxn*%-glcgd|0";

MD5 Encryption Instance
public static string getMD5 (String str) throws NoSuchAlgorithmException {
MessageDigest MD5 = NULL;
try {
MD5 = messagedigest.getinstance ("MD5");
catch (Exception e) {
E.printstacktrace ();
Return "";
}
char[] Chararray = Str.tochararray ();
byte[] ByteArray = new Byte[chararray.length];
for (int i = 0; i < chararray.length; i++) {
Bytearray[i] = (byte) chararray[i];
}
byte[] md5bytes = Md5.digest (ByteArray);
StringBuffer hexvalue = new StringBuffer ();
for (int i = 0; i < md5bytes.length; i++) {
int val = ((int) md5bytes[i]) & 0xFF;
if (Val < 16) {
Hexvalue.append ("0");
}
Hexvalue.append (Integer.tohexstring (Val));
}
return hexvalue.tostring ();
}



public static String Byte2hex (byte[] b) {
String hs = "";
String stmp = "";
for (int n = 0; n < b.length; n++) {
Stmp = (java.lang.Integer.toHexString (b[n] & 0XFF));
if (stmp.length () = = 1) {
HS = HS + "0" + stmp;
} else {
HS = HS + stmp;
}
}
return HS;
}

SHA1 Encryption Instance
public static string Encrypttosha (string info) {
byte[] Digesta = null;
try {
Get a SHA-1 message digest
MessageDigest alga = messagedigest.getinstance ("SHA-1");
Add information to calculate a summary
Alga.update (Info.getbytes ());
Get the summary
Digesta = Alga.digest ();
catch (NoSuchAlgorithmException e) {
E.printstacktrace ();
}
Convert a summary to a string
String rs = Byte2hex (Digesta);
Return RS + key;
}
}