android MD5加密

/**
 * 将给定的字符串MD5加密
 *
 * @param string 给定的字符串
 * @return MD5加密后生成的字符串
 */
public static String MD5(String string) {
    String result = null;
    try {
        char[] charArray = string.toCharArray();
        byte[] byteArray = new byte[charArray.length];
        for (int i = 0; i < charArray.length; i++) {
            byteArray[i] = (byte) charArray[i];
        }
        StringBuffer hexValue = new StringBuffer();
        byte[] md5Bytes = MessageDigest.getInstance("MD5")
                .digest(byteArray);
        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));
        }
        result = hexValue.toString();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return result;
}