Android 16進位制轉換工具類

/**
 * author：wiki on 2018/12/12
 * email：zhengweiqunemail@qq.com
 */
public class ConvertUtil {

/**
* 16進位制字串轉化為字母ASCALL碼
*
* @param hex 要轉化的16進位制數，用空格隔開
*如：53 68 61 64 6f 77
* @return ASCALL碼
*/
public static String convertHexToAsCall(String hex) {
StringBuilder sb = new StringBuilder();
String[] split = hex.split(" ");
for (String str : split) {
int i = Integer.parseInt(str, 16);
if (i < 0x20 || i == 0x7F) {//過濾特殊字元
continue;
}
sb.append((char) i);
}
return sb.toString();
}

/**
* 16進位制陣列轉String
*
* @param data byte陣列
* @return string
*/
public static String formatHex2String(byte[] data) {
final StringBuilder stringBuilder = new StringBuilder(data.length);
for (byte byteChar : data)
stringBuilder.append(String.format("%02X ", byteChar));
return stringBuilder.toString();
}

/**
* 16進位制字串轉換為Byte值
*
* @param src Byte字串，每個Byte之間沒有分隔符，eg:616C6B
* @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;
}

/**
* 字串轉換成十六進位制字串
*
* @param str 待轉換的ASCII字串
* @return String 每個Byte之間沒有分隔，如: [616C6B]
*/
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();
}

}