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[操作系统]Android与单片机通信常用数据转换方法(汇总)


下面直接贴代码

1.  将GB2312转化为中文,如BAFAC2DCB2B7→胡萝卜,两个字节合成一个文字

  public static String stringToGbk(String string) throws Exception {    byte[] bytes = new byte[string.length() / 2];    for (int j = 0; j < bytes.length; j++) {      byte high = Byte.parseByte(string.substring(j * 2, j * 2 + 1), 16);      byte low = Byte.parseByte(string.substring(j * 2 + 1, j * 2 + 2),          16);      bytes[j] = (byte) (high << 4 | low);    }    String result = new String(bytes, "GBK");    return result;  }

2.将中文转化为GB2312,并且结果以byte[]形式返回,如胡萝卜→new byte[]{BA  FA C2 DC B2 B7},一个字被分为两个字节

  public static byte[] gbkToString(String str) throws Exception {    return new String(str.getBytes("GBK"), "gb2312").getBytes("gb2312");  }

 3.将十六进制的byte[]原封不动的转化为string,如byte[]{0x7e,0x80,0x11,0x20}→7e801120,可用于log打印

  public static String bytesToHexString(byte[] src) {    StringBuilder stringBuilder = new StringBuilder("");    if (src == null || src.length <= 0) {      return null;    }    for (int i = 0; i < src.length; i++) {      int v = src[i] & 0xFF;      String hv = Integer.toHexString(v);      if (hv.length() < 2) {        stringBuilder.append(0);      }      stringBuilder.append(hv);    }    return stringBuilder.toString();  }

4.将十六进制的byte[]原封不动的转化为string,并且每个byte之间用空格分开,如byte[]{0x7e,0x80,0x11,0x20}→7e 80 11 20,,可用于log打印

  public static StringBuilder byte2HexStr(byte[] data) {    if (data != null && data.length > 0) {      StringBuilder stringBuilder = new StringBuilder(data.length);      for (byte byteChar : data) {        stringBuilder.append(String.format("%02X ", byteChar));      }      return stringBuilder;    }    return null;  }

5.将byte[]数组转化为8、10、16等各种进制,例如byte[0x11,0x20]→4384,约等于1120(16进制)→4384,radix代表进制

  public static String bytesToAllHex(byte[] bytes, int radix) {    return new BigInteger(1, bytes).toString(radix);// 这里的1代表正数  }

6.将String的十六进制原封不动转化为byte的十六进制,例如7e20→new byte[]{0x7e,x20}

public static byte[] HexString2Bytes(String src) {    byte[] ret = new byte[src.length() / 2];    byte[] tmp = src.getBytes();    for (int i = 0; i < tmp.length / 2; i++) {      ret[i] = uniteBytes(tmp[i * 2], tmp[i * 2 + 1]);    }    return ret;  }