[Support Request] for loop let crash the app

[harryberlin]

Hi,

i'm trying to send data from for loop, but during the loop the app crashes. by using Thread i get the same result.

i did lot of variants with Thread or Runnable, but evertime bad result. have no idea to solve this.

If i don't use Thread, i think the Serial Buffer overflows.

void btnClick() {        
  new Thread(new Runnable() {
    public void run() {
        for (int i = 0; i < 60; i++) {
            sendHex((byte) 0xFB, (byte) 0xFA,
                new byte[]{
                0x08,  //command
                (byte) i //adress
            });
            Thread.sleep(100);
        }
    }
  }).start();
}

private void sendHex(byte src, byte dst, byte[] data) {
        String sData = "";
        int sDataColor = R.color.colorSendText;

        byte[] ibus_msg = new byte[(data.length+4)];
        ibus_msg[0] = src; //SRC
        ibus_msg[1] = (byte) (data.length+2); //LEN
        ibus_msg[2] = dst; //DST

        for (int i = 0; i < data.length; i++) {
            ibus_msg[i+3] = data[i]; //DATA
        }

        ibus_msg[ibus_msg.length-1] = ibus_msg[0]; //CK
        for (int i = 1; i < ibus_msg.length-1; i++) {
            ibus_msg[ibus_msg.length-1] ^= ibus_msg[i];
        }

        try {
            if(connected != Connected.True) {
                Toast.makeText(getActivity(), "not connected", Toast.LENGTH_SHORT).show();
                throw new Exception("not connected");
            }
            service.write(ibus_msg);
        } catch (Exception e) {
            onSerialIoError(e);
            sDataColor = R.color.colorErrorText;
        }

        for (int i=0; i < ibus_msg.length; i++) {
            if (i!=0) sData += " ";
            sData += String.format("%02X", ibus_msg[i]);
        }
        _addText(sData, sDataColor);
}

public void _addText(String text, int colorId) {
        SpannableStringBuilder spn = new SpannableStringBuilder(text + "\n");
        spn.setSpan(new ForegroundColorSpan(getResources().getColor(colorId)), 0, spn.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
        receiveText.append(spn);

}

[harryberlin]

got solved the issue. needed to use a handler.