16进制转字符串转成byte[]数组

public static byte[] stringTobytes(String hexString) {
    String stringProcessed = hexString.trim().replaceAll("0x", "");    stringProcessed = stringProcessed.replaceAll("\\s+", "");    byte[] data = new byte[stringProcessed.length() / 2];    int i = 0;
    for(int j = 0; i <= stringProcessed.length() - 1; i += 2) {
        byte character = (byte)Integer.parseInt(stringProcessed.substring(i, i + 2), 16);        data[j] = character;        ++j;    }

    return data;}

//byte转换16进制字符串

public static final String bytesToHexString(byte[] bArray) {
    StringBuffer sb = new StringBuffer(bArray.length);    String sTemp;    for (int i = 0; i < bArray.length; i++) {
        sTemp = Integer.toHexString(0xFF & bArray[i]);        if (sTemp.length() < 2)
            sb.append(0);        sb.append(sTemp.toUpperCase());    }
    return sb.toString();}

CountDownTimer（计时器）

try {
    if (cdt != null)
        cdt.cancel();} catch (Exception e) {
}
cdt = null;completedProbar.setProgress(0);
cdt = new CountDownTimer(30000, 1000) {
    int cc = 1;
    @Override    public void onTick(long millisUntilFinished) {
        
        cc++;    }

    @Override    public void onFinish() {
           }
}.start();

30秒每1秒进来一次onTick，完成后调用onFinish