HexDump.java解析android 16进制转换

package com.android.internal.util;public class HexDump{    private final static char[] HEX_DIGITS = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };//十六进制的组成元素        public static String dumpHexString(byte[] array)    {        return dumpHexString(array, 0, array.length);    }        public static String dumpHexString(byte[] array, int offset, int length)    {        StringBuilder result = new StringBuilder();                byte[] line = new byte[16];        int lineIndex = 0;                result.append("\n0x");        result.append(toHexString(offset));                for (int i = offset ; i < offset + length ; i++)        {            if (lineIndex == 16)            {                result.append(" ");                                for (int j = 0 ; j < 16 ; j++)                {                    if (line[j] > ' ' && line[j] < '~')                    {                        result.append(new String(line, j, 1));                    }                    else                    {                        result.append(".");                    }                }                                result.append("\n0x");                result.append(toHexString(i));                lineIndex = 0;            }                        byte b = array[i];            result.append(" ");            result.append(HEX_DIGITS[(b >>> 4) & 0x0F]);            result.append(HEX_DIGITS[b & 0x0F]);                        line[lineIndex++] = b;        }                if (lineIndex != 16)        {            int count = (16 - lineIndex) * 3;            count++;            for (int i = 0 ; i < count ; i++)            {                result.append(" ");            }                        for (int i = 0 ; i < lineIndex ; i++)            {                if (line[i] > ' ' && line[i] < '~')                {                    result.append(new String(line, i, 1));                }                else                {                    result.append(".");                }            }        }                return result.toString();    }        public static String toHexString(byte b)    {        return toHexString(toByteArray(b));    }    public static String toHexString(byte[] array)    {        return toHexString(array, 0, array.length);    }        public static String toHexString(byte[] array, int offset, int length)    {        char[] buf = new char[length * 2];        int bufIndex = 0;        for (int i = offset ; i < offset + length; i++)         {            byte b = array[i];            buf[bufIndex++] = HEX_DIGITS[(b >>> 4) & 0x0F];            buf[bufIndex++] = HEX_DIGITS[b & 0x0F];        }        return new String(buf);            }        public static String toHexString(int i)    {        return toHexString(toByteArray(i));    }        public static byte[] toByteArray(byte b)    {        byte[] array = new byte[1];        array[0] = b;        return array;    }        public static byte[] toByteArray(int i)    {        byte[] array = new byte[4];                array[3] = (byte)(i & 0xFF);        array[2] = (byte)((i >> 8) & 0xFF);        array[1] = (byte)((i >> 16) & 0xFF);        array[0] = (byte)((i >> 24) & 0xFF);                return array;    }        private static int toByte(char c)    {        if (c >= '0' && c <= '9') return (c - '0');        if (c >= 'A' && c <= 'F') return (c - 'A' + 10);        if (c >= 'a' && c <= 'f') return (c - 'a' + 10);        throw new RuntimeException ("Invalid hex char '" + c + "'");    }        public static byte[] hexStringToByteArray(String hexString)    {        int length = hexString.length();        byte[] buffer = new byte[length / 2];        for (int i = 0 ; i < length ; i += 2)        {            buffer[i / 2] = (byte)((toByte(hexString.charAt(i)) << 4) | toByte(hexString.charAt(i+1)));        }                return buffer;    }    }