[移动开发]android：字节数组转16进制

public class HexUtil {

    public static String bytesToHex(byte[] bytes) {
        char[] hexChars = new char[bytes.length * 2];
        char[] hexArray = "0123456789ABCDEF".toCharArray();
        for (int j = 0; j < bytes.length; j++) {
            int v = bytes[j] & 0xFF;
            hexChars[j * 2] = hexArray[v >>> 4];
            hexChars[j * 2 + 1] = hexArray[v & 0x0F];
        }
        return new String(hexChars);
    }

    public static byte[] hexToByteArray(String hexString) {
        int hexlen = hexString.length();
        byte[] result;
        if (hexlen % 2 == 1){
            //奇数
            hexlen++;
            result = new byte[(hexlen/2)];
            hexString="0"+hexString;
        }else {
            //偶数
            result = new byte[(hexlen/2)];
        }
        int j=0;
        for (int i = 0; i < hexlen; i+=2){
            result[j]= (byte) Integer.parseInt(hexString.substring(i,i+2),16);
            j++;
        }
        return result;

    }