How to compare current time with next day time in Android?

Question

I'm creating a prayer app. In my app, I calculate upcoming prayer remaining time(by comparing current time) and my countdown timer starts. But, when last prayer(Isha) countdown timer ends then, I've to calculate countdown timer for tomorrow first(Fajr) prayer with current time.

I don't know how to calculate remaining time for tomorrow first prayer?

I've tomorrow first prayer(fajr) time. Please help.

Why are you using timer? You can use alarm manager to trigger on specific time like on prayer time. — Karn Shah, Jul 30 '15 at 12:23
i just want to calculate time difference between current time with tomorrow specific time. — Mansoor Ahmad, Jul 30 '15 at 12:24
convert your tomorrow time in milliseconds and you can get current time in milliseconds from System.currentTimeMillis(). — Karn Shah, Jul 30 '15 at 12:26
@KarnShah can you tell me how i convert tomorrow time in milliseconds — Mansoor Ahmad, Jul 30 '15 at 12:28

Viktor Yakunin · Accepted Answer · 2015-07-30T13:02:42.497

If you need to use standard java classes then Calendar class is the best choice here. http://developer.android.com/reference/java/util/Calendar.html

Simple code:

        Calendar nextDayCal = Calendar.getInstance();
        nextDayCal.add(Calendar.DAY_OF_YEAR, 1);
        nextDayCal.set(Calendar.MILLISECOND, 0);
        nextDayCal.set(Calendar.SECOND, 0);
        nextDayCal.set(Calendar.MINUTE, 0);
        nextDayCal.set(Calendar.HOUR_OF_DAY, 0);

        Calendar nowCal = Calendar.getInstance();

        int hourDif = nextDayCal.get(Calendar.HOUR_OF_DAY) - nowCal.get(Calendar.HOUR_OF_DAY);

How to compare current time with next day time in Android?

1 Answers1