Method random

thunder/src/main/java/com/xunlei/downloadlib/android/XLUtil.java:24–29

(String base, int length)

    }

    private static String random(String base, int length) {
        SecureRandom random = new SecureRandom();
        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < length; i++) sb.append(base.charAt(random.nextInt(base.length())));
        return sb.toString();
    }

    public static String getGuid() {
        return getIMEI() + "_" + getMAC();