MD5 Encryption for string - Android java.security

Android examples for java.security:MD5

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Description

MD5 Encryption for string

Demo Code

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class Main{

    /**//w ww  . ja v  a 2  s . c o m
     * MD5 Encryption
     * 
     * @param str
     * @return
     */
    public static String getMD5Str(String str) {
        MessageDigest messageDigest = null;
        try {
            messageDigest = MessageDigest.getInstance("MD5");
            messageDigest.reset();
            messageDigest.update(str.getBytes("UTF-8"));
        } catch (NoSuchAlgorithmException e) {
            return null;
        } catch (UnsupportedEncodingException e) {
            return null;
        }

        final byte[] byteArray = messageDigest.digest();

        final StringBuffer md5StrBuff = new StringBuffer();

        for (int i = 0; i < byteArray.length; i++) {
            if (Integer.toHexString(0xFF & byteArray[i]).length() == 1) {
                md5StrBuff.append("0").append(
                        Integer.toHexString(0xFF & byteArray[i]));
            } else {
                md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i]));
            }
        }
        // 6-bit encryption, 9 to 25
        return md5StrBuff.substring(8, 24).toString().toUpperCase();
    }

}

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