Timer timer = new Timer();
TimerTask task = new TimerTask() {
public void run() {
form.append(new Date().toString());
destroyApp(true);
TimeClient.this.notifyDestroyed();
}
};
timer.schedule(task, 60000); // 60 seconds from now
byte[] ping = {(byte) 50}; // any byte will do
DatagramConnection connection = null;
try {
connection = (DatagramConnection) Connector.open(server);
Datagram dgram = connection.newDatagram(ping, ping.length);
Datagram response = connection.newDatagram(4);
connection.send(dgram);
connection.receive(response);
byte[] result = response.getData();
if (result.length != 4) {
form.append("Unrecognized response format");
return;
}
long differenceBetweenEpochs = 2208988800L;
long secondsSince1900 = 0;
for (int i = 0; i < 4; i++) {
secondsSince1900 = (secondsSince1900 << 8) | (result[i] & 0x000000FF);
}
long secondsSince1970
= secondsSince1900 - differenceBetweenEpochs;
long msSince1970 = secondsSince1970 * 1000;
Date time = new Date(msSince1970);
form.append(time.toString() + "\n");
}
catch (IOException ex) {
Alert alert = new Alert("UDP Error");
alert.setTimeout(Alert.FOREVER);
alert.setString(ex.getMessage());
Display.getDisplay(this).setCurrent(alert, form);
}
finally {
timer.cancel();
try {
if (connection != null) connection.close();
}
catch (IOException ex) {
}
}
