获取手机唯一标识

由于android版本升级升的问题，导致好多手机无法获取唯一标识，一下是获取手机标识的方法

private String getuuid(){
        String uuid = "";
        String serial = null;

        String m_szDevIDShort = "35" +
                Build.BOARD.length() % 10 + Build.BRAND.length() % 10 +

                Build.CPU_ABI.length() % 10 + Build.DEVICE.length() % 10 +

                Build.DISPLAY.length() % 10 + Build.HOST.length() % 10 +

                Build.ID.length() % 10 + Build.MANUFACTURER.length() % 10 +

                Build.MODEL.length() % 10 + Build.PRODUCT.length() % 10 +

                Build.TAGS.length() % 10 + Build.TYPE.length() % 10 +

                Build.USER.length() % 10; //13 位

        try {
            serial = android.os.Build.class.getField("SERIAL").get(null).toString();
            //API>=9 使用serial号
            uuid = new UUID(m_szDevIDShort.hashCode(), serial.hashCode()).toString();
        } catch (Exception exception) {
            //serial需要一个初始化
            serial = "serial"; // 随便一个初始化
            //使用硬件信息拼凑出来的15位号码
            uuid = new UUID(m_szDevIDShort.hashCode(), serial.hashCode()).toString();
        }
        return  md5(uuid).substring(8, 24).toString().toUpperCase();
    }

    private static String md5(String string) {
        if (TextUtils.isEmpty(string)) {
            return "";
        }
        MessageDigest md5 = null;
        try {
            md5 = MessageDigest.getInstance("MD5");
            byte[] bytes = md5.digest(string.getBytes());
            StringBuilder result = new StringBuilder();
            for (byte b : bytes) {
                String temp = Integer.toHexString(b & 0xff);
                if (temp.length() == 1) {
                    temp = "0" + temp;
                }
                result.append(temp);
            }
            return result.toString();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }
        return "";
    }

通过获取手机相应的硬件信息，用md5加密后返回唯一标识。