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;
}
}