– layout: post # 使用的布局（不需要改） title: BLE数据格式转化的工具类 # 标题 subtitle: #副标题 date: 2017-01-11 # 时间 author: PanMin # 作者 header-img: img/post-bg-2015.jpg #这篇文章标题背景图片 catalog: true # 是否归档 tags: #标签 - Android —
两个byte –>int
private int byteToInt(byte b, byte c) {//计算总包长，两个字节表示的
short s = 0;
int ret;
short s0 = (short) (c & 0xff);// 最低位
short s1 = (short) (b & 0xff);
s1 <<= 8;
s = (short) (s0 | s1);
ret = s;
return ret;
}
int –>两个byte
private byte[] int2byte(int res) {
byte[] targets = new byte[2];
targets[1] = (byte) (res & 0xff);// 最低位
targets[0] = (byte) ((res >> 8) & 0xff);// 次低位
return targets;
}
16进制字符串 –>byte[ ]
public static byte[] hexStringToByte(String hex) {
int len = (hex.length() / 2);
byte[] result = new byte[len];
char[] achar = hex.toCharArray();
for (int i = 0; i < len; i++) {
int pos = i * 2;
result[i] = (byte) (toByte(achar[pos]) << 4 | toByte(achar[pos + 1]));
}
return result;
}
private static byte toByte(char c) {
byte b = (byte) "0123456789ABCDEF".indexOf(c);
return b;
}
byte[ ] –>16进制字符串
public static String byte2hex(byte [] buffer){
String h = "";
for(int i = 0; i < buffer.length; i++){
String temp = Integer.toHexString(buffer[i] & 0xFF);
if(temp.length() == 1){
temp = "0" + temp;
}
h = h + temp;
}
return h;
}