Android Utililty Methods Hex String to Byte Array Convert

List of utility methods to do Hex String to Byte Array Convert

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Description

The list of methods to do Hex String to Byte Array Convert are organized into topic(s).

Method

StringfromHex(String hex)
from Hex 
return new String(toByte(hex));
byte[]fromHex(String hexData)
Converts a Hex-encoded data string to the original byte data. 
byte[] result = new byte[(hexData.length() + 1) / 2];
String hexNumber = null;
int stringOffset = 0;
int byteOffset = 0;
while (stringOffset < hexData.length()) {
    hexNumber = hexData.substring(stringOffset, stringOffset + 2);
    stringOffset += 2;
    result[byteOffset++] = (byte) Integer.parseInt(hexNumber, 16);
...
byte[]hexStringToByteArray(String s)
hex String To Byte Array 
int len = s.length();
byte[] data = new byte[len / 2];
for (int i = 0; i < len; i += 2) {
    data[i / 2] = (byte) ((Character.digit(s.charAt(i), 16) << 4) + Character
            .digit(s.charAt(i + 1), 16));
return data;
byte[]hexStringToBytes(String hex)
hex String To Bytes 
int len = (hex.length() / 2);
byte[] res = new byte[len];
char[] c = hex.toCharArray();
for (int i = 0; i < len; i++) {
    int pos = i * 2;
    res[i] = (byte) (toByte(c[pos]) << 4 | toByte(c[pos + 1]));
return res;
...
byte[]hexStringToBytes(String hex)
hex String To Bytes 
if (0 != hex.length() % 2)
    throw new IllegalArgumentException(hex
            + " not be a valid HEX String!");
byte[] result = new byte[hex.length() >> 1];
int high_nibble;
int low_nibble;
for (int i = 0, j = 0; i < result.length; i++, j += 2) {
    high_nibble = Character.digit(hex.charAt(j), 16) << 4;
...
byte[]hexStringToBytes(String hexString)
hex String To Bytes 
if (hexString == null || hexString.equals("")) {
    return null;
hexString = hexString.toUpperCase();
int length = hexString.length() / 2;
char[] hexChars = hexString.toCharArray();
byte[] d = new byte[length];
for (int i = 0; i < length; i++) {
...
byte[]hexStringToBytes(String hexString)
hex String To Bytes 
if (hexString == null || hexString.equals("")) {
    return null;
hexString = hexString.toUpperCase();
int length = hexString.length() / 2;
char[] hexChars = hexString.toCharArray();
byte[] d = new byte[length];
for (int i = 0; i < length; i++) {
...
byte[]toByte(String hexString)
to Byte 
int len = hexString.length() / 2;
byte[] result = new byte[len];
for (int i = 0; i < len; i++)
    result[i] = Integer.valueOf(
            hexString.substring(2 * i, 2 * i + 2)).byteValue();
return result;
byte[]toByte(String hexString)
Retrieve the bytes data 
int len = hexString.length() / 2;
byte[] result = new byte[len];
for (int i = 0; i < len; i++)
    result[i] = Integer.valueOf(
            hexString.substring(2 * i, 2 * i + 2), 16).byteValue();
return result;
byte[]hex2byte(String inputString)
hexbyte 
if (inputString == null || inputString.length() < 2) {
    return new byte[0];
inputString = inputString.toLowerCase();
int l = inputString.length() / 2;
byte[] result = new byte[l];
for (int i = 0; i < l; ++i) {
    String tmp = inputString.substring(2 * i, 2 * i + 2);
...