关于处理进制的工具方法

1：将short类型的十六进制转化为16位的二进制

public static byte toByte(short value, boolean first) {
    if (first)
        return (byte) (0xff & (value >> 8));
    return (byte) (0xff & value);
}



2：将一个十进制数转化为32位的二进制数

public static byte toByte(int value, int pos) {
    switch(pos){
    case 0:
       return (byte) (0xff & (value >> 24));
    case 1:
       return (byte) (0xff & (value >> 16));
    case 2:
       return (byte) (0xff & (value >> 8));
    case 3:
       return (byte) (0xff & value);
       default:
          return 0;
    }
}

3：测试版日志的打印

public static void logPrint(String tag,String msg){
   //Constant.ISDEBUG作为一个开关
 if(Constant.ISDEBUG){
  Log.d(tag,msg);
 }
}


4将mac地址的十六进制转化为十进制

public static byte ascTobyte(byte asc) {
   byte byteVal = 0;
   if (asc >= '0' && asc <= '9')
      byteVal = (byte) (asc - '0');
   else if (asc >= 'a' && asc <= 'z')
      byteVal = (byte) (asc - 'a' + 10);
   else if (asc >= 'A' && asc <= 'Z')
      byteVal = (byte) (asc - 'A' + 10);
   return byteVal;
}