Calculating time difference with start time and elapsed time

Question

public static final long TIMEOUT = 60000;
public static final long SYSTEM_TIME = System.currentTimeMillis();

I have the TIMEOUT Value for my application set as 60000 and i have my system time. Now how would i know that 50 seconds has been elapsed and i need to show a message to the end-user.

if (TIMEOUT  - SYSTEM_TIME <= 10000) {
    Toast.makeText(getApplicationContext(), "10 Seconds Left", Toast.LENGTH_LONG).show();
    disconnectHandler.postDelayed(disconnectCallback, DISCONNECT_TIMEOUT);
}

use [Timer](http://developer.android.com/intl/ru/reference/java/util/Timer.html) — jimpanzer, Apr 12 '13 at 09:53
why not use nanoTime() for duration measurement? http://stackoverflow.com/questions/510462/is-system-nanotime-completely-useless — Hector, Apr 12 '13 at 09:59

score 1 · Accepted Answer · edited Apr 12 '13 at 10:17

1

If you don't need to do other stuff in that thread you can use a sleep(50000).

edited Apr 12 '13 at 10:17

Cyril Gandon

16,830
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answered Apr 12 '13 at 09:57

jamp

2,159
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score 1 · Answer 2 · answered Apr 12 '13 at 10:00

This is how to run a specific task one-shot:

new Timer().schedule(new TimerTask() {              
            @Override
            public void run() {
                // TODO
                ...
            }
        }, TIMEOUT);

The doc is here (as reported by jimpanzer)

score 1 · Answer 3 · answered Apr 12 '13 at 10:02

1

Maybe that you can use something like this :

long startTime = SystemClock.elapsedRealtime();
// do what you want
long endTime = SystemClock.elapsedRealtime();
long ellapsedTime = endTime - startTime;
if (ellapsedTime>TIME_OUT) {
    // do stuff
}

answered Apr 12 '13 at 10:02

Fred

38
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score 1 · Answer 4 · answered Apr 12 '13 at 10:05

Maybe I am wrong or just not had enough coffee yet, but Timeout is 60000, your System value is much more - all millis starting at the year 1970 (if I am not mistaken here as well). This means your result from TIMEOUT - SYSTEM_TIME is negative and therefor a negative number and therefor smaller than 10000. So your if-statement always runs.

Calculating time difference with start time and elapsed time

4 Answers4