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Android Java - comparing date/time to create a popup.
Hi all,
I want to create a popup alert when the time equals the time stored in a string.
I have the date time in a string like this.
I then have a timer running which does the comparison.
However this doesn't work. Nothing happens.
Could it be something to do with timezones? Is there a better way?
I want to create a popup alert when the time equals the time stored in a string.
I have the date time in a string like this.
strAlertDate = "14-01-2014 00:45:39";
I then have a timer running which does the comparison.
private Runnable updateTimerThread = new Runnable() {
public void run() {
SimpleDateFormat sdf = new SimpleDateFormat("dd-MM-yyyy HH:mm:ss");
String currentDateandTime = sdf.format(new Date());
if(currentDateandTime.equals(strAlertDate)) {
alertMessge();
}
customHandler.postDelayed(this, 0);
}
};
However this doesn't work. Nothing happens.
Could it be something to do with timezones? Is there a better way?
AndroidJava
Last Comment
krakatoa
Although I don't do Android, it's extremely likely that your Timer resolution isn't right. Your code would certainly work. I ran it with a fixed rate schedule of 1000ms Period, and it was ok. I used a Timer handled by a separate class extending TimerTask.
ASKER
Is there a better way?
The time/date of the alert changes based on other factors. I need to have an alarm go off if the time ever reaches the alert time/date.
Rather then run a timer constantly comparing like above, can I set an alarm in the android system? I would need the ability to remove and recreate the alarm if the alarm time changes before the time is reached.
The time/date of the alert changes based on other factors. I need to have an alarm go off if the time ever reaches the alert time/date.
Rather then run a timer constantly comparing like above, can I set an alarm in the android system? I would need the ability to remove and recreate the alarm if the alarm time changes before the time is reached.
I don't know if there are alarms you can set in Android. Nearly all I know is that a separate thread timer does work - cf: your comment that "nothing happens".
A separate thread has quite low running costs, at least on desktop Java.
So your requirement actually seems to include a dynamic alarm deadline, which might be redefined before the current alarm deadline is reached - is that right? That anyway sounds like a job for a separate thread responsible for updating the alarm params.
(From where is the alarm deadline issued?)
A separate thread has quite low running costs, at least on desktop Java.
So your requirement actually seems to include a dynamic alarm deadline, which might be redefined before the current alarm deadline is reached - is that right? That anyway sounds like a job for a separate thread responsible for updating the alarm params.
(From where is the alarm deadline issued?)
ASKER
So your requirement actually seems to include a dynamic alarm deadline, which might be redefined before the current alarm deadline is reached - is that right?That is correct.
(From where is the alarm deadline issued?)The time and date comes from a webservice. The web service is automatically called every 10 minutes. Occasionally (every few hours) the alarm deadline changes.
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