generateRandomString function
Function for retrieve a random hexadecimal string.
Implementation
String generateRandomString() {
Random random = Random();
const chars = '0123456789abcdef'; // 可以根据需要修改字符集合
String result = '';
for (int i = 0; i < 32; i++) {
result += chars[random.nextInt(chars.length)];
}
return result;
}