android String byte[] 进制之间的互相转换

/**
* 字符串转换成十六进制字符串
* @param String str 待转换的ASCII字符串
* @return String 每个Byte之间空格分隔，如: [61 6C 6B]
*/
public static String str2HexStr(String str)
{

char[] chars = "0123456789ABCDEF".toCharArray();
StringBuilder sb = new StringBuilder("");
byte[] bs = str.getBytes();
int bit;

for (int i = 0; i < bs.length; i++)
{
bit = (bs[i] & 0x0f0) >> 4;
sb.append(chars[bit]);
bit = bs[i] & 0x0f;
sb.append(chars[bit]);
sb.append(' ');
}
return sb.toString().trim();
}

/**
* 十六进制转换字符串
* @param String str Byte字符串(Byte之间无分隔符 如:[616C6B])
* @return String 对应的字符串
*/
public static String hexStr2Str(String hexStr)
{
String str = "0123456789ABCDEF";
char[] hexs = hexStr.toCharArray();
byte[] bytes = new byte[hexStr.length() / 2];
int n;

for (int i = 0; i < bytes.length; i++)
{
n = str.indexOf(hexs[2 * i]) * 16;
n += str.indexOf(hexs[2 * i + 1]);
bytes[i] = (byte) (n & 0xff);
}
return new String(bytes);
}

/**
* bytes转换成十六进制字符串
* @param byte[] b byte数组
* @return String 每个Byte值之间空格分隔
*/
public static String byte2HexStr(byte[] b)
{
String stmp="";
StringBuilder sb = new StringBuilder("");
for (int n=0;n<b.length;n++)
{
stmp = Integer.toHexString(b
& 0xFF);
sb.append((stmp.length()==1)? "0"+stmp : stmp);
sb.append(" ");
}
return sb.toString().toUpperCase().trim();
}

/**
* bytes字符串转换为Byte值
* @param String src Byte字符串，每个Byte之间没有分隔符
* @return byte[]
*/
public static byte[] hexStr2Bytes(String src)
{
int m=0,n=0;
int l=src.length()/2;
System.out.println(l);
byte[] ret = new byte[l];
for (int i = 0; i < l; i++)
{
m=i*2+1;
n=m+1;
ret[i] = Byte.decode("0x" + src.substring(i*2, m) + src.substring(m,n));
}
return ret;
}

/**
* String的字符串转换成unicode的String
* @param String strText 全角字符串
* @return String 每个unicode之间无分隔符
* @throws Exception
*/
public static String strToUnicode(String strText)
throws Exception
{
char c;
StringBuilder str = new StringBuilder();
int intAsc;
String strHex;
for (int i = 0; i < strText.length(); i++)
{
c = strText.charAt(i);
intAsc = (int) c;
strHex = Integer.toHexString(intAsc);
if (intAsc > 128)
str.append("\\u" + strHex);
else // 低位在前面补00
str.append("\\u00" + strHex);
}
return str.toString();
}

/**
* unicode的String转换成String的字符串
* @param String hex 16进制值字符串 （一个unicode为2byte）
* @return String 全角字符串
*/
public static String unicodeToString(String hex)
{
int t = hex.length() / 6;
StringBuilder str = new StringBuilder();
for (int i = 0; i < t; i++)
{
String s = hex.substring(i * 6, (i + 1) * 6);
// 高位需要补上00再转
String s1 = s.substring(2, 4) + "00";
// 低位直接转
String s2 = s.substring(4);
// 将16进制的string转为int
int n = Integer.valueOf(s1, 16) + Integer.valueOf(s2, 16);
// 将int转换为字符
char[] chars = Character.toChars(n);
str.append(new String(chars));
}
return str.toString();
}

//-------------------------------------------------------
// 判断奇数或偶数，位运算，最后一位是1则为奇数，为0是偶数
static public int isOdd(int num)
{
return num & 0x1;
}
//-------------------------------------------------------
static public int HexToInt(String inHex)//Hex字符串转int
{
return Integer.parseInt(inHex, 16);
}
//-------------------------------------------------------
static public byte HexToByte(String inHex)//Hex字符串转byte
{
return (byte)Integer.parseInt(inHex,16);
}
//-------------------------------------------------------
static public String Byte2Hex(Byte inByte)//1字节转2个Hex字符
{
return String.format("%02x", inByte).toUpperCase();
}
//-------------------------------------------------------
static public String ByteArrToHex(byte[] inBytArr)//字节数组转转hex字符串
{
StringBuilder strBuilder=new StringBuilder();
int j=inBytArr.length;
for (int i = 0; i < j; i++)
{
strBuilder.append(Byte2Hex(inBytArr[i]));
strBuilder.append(" ");
}
return strBuilder.toString();
}
//-------------------------------------------------------
static public String ByteArrToHex(byte[] inBytArr,int offset,int byteCount)//字节数组转转hex字符串，可选长度
{
StringBuilder strBuilder=new StringBuilder();
int j=byteCount;
for (int i = offset; i < j; i++)
{
strBuilder.append(Byte2Hex(inBytArr[i]));
}
return strBuilder.toString();
}
//-------------------------------------------------------
//转hex字符串转字节数组
static public byte[] HexToByteArr(String inHex)//hex字符串转字节数组
{
int hexlen = inHex.length();
byte[] result;
if (isOdd(hexlen)==1)
{//奇数
hexlen++;
result = new byte[(hexlen/2)];
inHex="0"+inHex;
}else {//偶数
result = new byte[(hexlen/2)];
}
int j=0;
for (int i = 0; i < hexlen; i+=2)
{
result[j]=HexToByte(inHex.substring(i,i+2));
j++;
}
return result;
}