Android与单片机通信常用数据转换方法
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;
}
public static byte uniteBytes(byte src0, byte src1) {
byte _b0 = Byte.decode("0x" + new String(new byte[] { src0 }))
.byteValue();
_b0 = (byte) (_b0 << 4);
byte _b1 = Byte.decode("0x" + new String(new byte[] { src1 }))
.byteValue();
byte ret = (byte) (_b0 ^ _b1);
return ret;
}
以上就是对Android 与单片机通信的资料整理，后续继续补充相关资料谢谢大家对本站的支持！
