Question

Im trying to get the time elapsed from a specific date (in millis)

In some devices I get the correct result
however, in other devices I get wrong result

here’s the code that i use:

public static void timeElapsedFromDate(long workingDate) 
{
    long diff = System.currentTimeMillis() - workingDate;

    long diffSeconds = diff / 1000;
    long diffMinutes = diffSeconds / 60;
    long diffHours = diffMinutes / 60;
    long diffDays = diffHours / 24;
    long diffWeeks = diffDays / 7;
    long diffMonth = diffDays / 30;
}

Isn’t it the way to measure time?

thanks!

Answer 1

First of all, diffMonth formula asks to be improved: from Feb 1st to Mar 1st it is usually 28 days, but one month. From Sep 1st to Sep 31st it is 30 days, but less than 1 month.

More subtle question regarding diffDays: isn’t it 1 day between 10 PM and 10 AM next morning?

Finally, how different devices can give different results: System.currenTTimeMillis() returns the difference, measured in milliseconds, between the current time and midnight, January 1, 1970 UTC. Even if the clock on all devices is correct, they may have different Time Zone settings.