How to convert a base64 string into hex in android?

Question

I am getting a base64 string. How do I convert it to hex. I tried the followind but it isn't working

String guid = "YxRfXk827kPgkmMUX15PNg==";
byte[] decoded = Base64.decodeBase64(guid);
String hexString = Hex.encodeHexString(decoded);
System.out.println(hexString);

How do you know it isn't working ? Do you have a reference ? What's the output ? — N.K, May 02 '18 at 12:36
What exactly "isn't working"? Wrong results? Missing imports? — f1sh, May 02 '18 at 12:39
Look at this topic https://stackoverflow.com/questions/41611248/java-convert-base64-to-hex-string — Siya, May 02 '18 at 12:39
@user2433953 "deprecated" doesn't mean it's not working, that's a compiler warning. Whats the output of your code? — f1sh, May 02 '18 at 12:40
look here https://stackoverflow.com/questions/9655181/how-to-convert-a-byte-array-to-a-hex-string-in-java — E.Abdel, May 02 '18 at 12:40

score 1 · Answer 1 · answered May 02 '18 at 12:43

String guid = "YxRfXk827kPgkmMUX15PNg==";
byte[] decoded = Base64.decodeBase64(guid);
String result = HexUtil.toHex(decoded);

the hexUtil class :

public class HexUtil{ 
    private static final char[] DIGITS = {
                '0', '1', '2', '3', '4', '5', '6', '7',
                '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
    };

    public static final String toHex(byte[] data) {
        final StringBuilder sb = new StringBuilder();
        for (byte d : data) {
            sb.append(DIGITS[(d >>> 4) & 0x0F]);
            sb.append(DIGITS[d & 0x0F]);
        }
        return sb.toString();
    }
}

How to convert a base64 string into hex in android?

1 Answers1