Android(安卓)操作蓝牙Ble时数据转换的常用方法

1.在操作蓝牙模块时候，Android 根据协议写数据，写入的是16进制数据，蓝牙返回来的数据也是16进制。在这里我们就要对数据转化。

2.下面是工作中常用的方法，写成了一个工具类，可以直接拿去用。都是经过测试有效

public class CommonUtil {    /*     * 将时间转换为时间戳     */    public static String dateToStamp(String s) throws ParseException {        String res;        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm");        Date date = simpleDateFormat.parse(s);        long ts = date.getTime();        res = String.valueOf(ts);        return res;    }    /**     * 合并byte数组     */    public static byte[] unitByteArray(byte[] byte1,byte[] byte2){        byte[] unitByte = new byte[byte1.length + byte2.length];        System.arraycopy(byte1, 0, unitByte, 0, byte1.length);        System.arraycopy(byte2, 0, unitByte, byte1.length, byte2.length);        return unitByte;    }    /*      * 16进制字符串转字节数组      */    public static byte[] hexString2Bytes(String hex) {        if ((hex == null) || (hex.equals(""))){            return null;        }        else if (hex.length()%2 != 0){            return null;        }        else{            hex = hex.toUpperCase();            int len = hex.length()/2;            byte[] b = new byte[len];            char[] hc = hex.toCharArray();            for (int i=0; i     *     * @param dt     * @return 当前日期是星期几     */    public static String getWeekOfDate(Date dt) {        String[] weekDays = {"07", "01", "02", "03", "04", "05", "06"};        Calendar cal = Calendar.getInstance();        cal.setTime(dt);        int w = cal.get(Calendar.DAY_OF_WEEK) - 1;        if (w < 0)            w = 0;        return weekDays[w];    }    /**     * 字符串转换成十六进制值     * @param bin String 我们看到的要转换成十六进制的字符串     * @return     */    public static String bin2hex(String bin) {        char[] digital = "0123456789ABCDEF".toCharArray();        StringBuffer sb = new StringBuffer("");        byte[] bs = bin.getBytes();        int bit;        for (int i = 0; i < bs.length; i++) {            bit = (bs[i] & 0x0f0) >> 4;            sb.append(digital[bit]);            bit = bs[i] & 0x0f;            sb.append(digital[bit]);        }        return sb.toString();    }    /**     * 把16进制字符串转化为byte数组     * @param hexString     * @return     */    public static byte[] toByteArray(String hexString) {        if (TextUtils.isEmpty(hexString))            throw new IllegalArgumentException("this hexString must not be empty");           hexString = hexString.toLowerCase();        final byte[] byteArray = new byte[hexString.length() / 2];        int k = 0;        for (int i = 0; i < byteArray.length; i++) {//因为是16进制，最多只会占用4位，转换成字节需要两个16进制的字符，高位在先            byte high = (byte) (Character.digit(hexString.charAt(k), 16) & 0xff);            byte low = (byte) (Character.digit(hexString.charAt(k + 1), 16) & 0xff);            byteArray[i] = (byte) (high << 4 | low);            k += 2;        }        return byteArray;    }    /**     * 将byte数组转为16进制字符串 此方法主要目的为方便Log的显示     */    public String bytesToHexString(byte[] src) {        StringBuilder stringBuilder = new StringBuilder("");        if (src == null || src.length <= 0) {            return null;        }        for (byte aSrc : src) {            int v = aSrc & 0xFF;            String hv = Integer.toHexString(v);            if (hv.length() < 2) {                stringBuilder.append(0);            }            stringBuilder.append(hv.toUpperCase()).append(" ");        }        return stringBuilder.toString();    }}

3.以上就是基本常用的方法，直接调用就好了

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