Android Utililty Methods String to Hex Byte Array Convert

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

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Description

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

Method

byte[]fromHexString(String s)
from Hex String 
char[] rawChars = s.toUpperCase().toCharArray();
int hexChars = 0;
for (char rawChar1 : rawChars) {
    if ((rawChar1 >= '0' && rawChar1 <= '9')
            || (rawChar1 >= 'A' && rawChar1 <= 'F')) {
        hexChars++;
byte[] byteString = new byte[(hexChars + 1) >> 1];
int pos = hexChars & 1;
for (char rawChar : rawChars) {
    if (rawChar >= '0' && rawChar <= '9') {
        byteString[pos >> 1] <<= 4;
        byteString[pos >> 1] |= rawChar - '0';
    } else if (rawChar >= 'A' && rawChar <= 'F') {
        byteString[pos >> 1] <<= 4;
        byteString[pos >> 1] |= rawChar - 'A' + 10;
    } else {
        continue;
    pos++;
return byteString;
byte[]hexDecode(String data)
hex Decode 
byte[] r = new byte[data.length() / 2];
char[] a = data.toCharArray();
for (int i = 0; i < a.length; i += 2) {
    char c1 = a[i], c2 = a[i + 1];
    int v1 = valueOf(c1);
    int v2 = valueOf(c2);
    r[i >> 1] = (byte) ((((v1 & 0xf) << 4) | (v2 & 0xf)) & 0xff);
return r;