Android - Find out what hour of day it is

Question

I want to use and alarmManager that sets a repeating alarm to go off on the hour, every hour. I know how to set a repeating alarm every hour but not how to actually set it from the top of the hour, I need to know this value for the 'whatTime' variable below.

AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
am.setRepeating(AlarmManager.ELAPSED_REALTIME, whatTime, 1*60*60*1000, operation);

Also I want to be able to set a flag that for e.g. - if the time happens to be between 4 and 8 in the daytime, perform some operations, otherwise don't bother.
So I really need to know how to find out the hour of the day, can anyone tell me how to do this? Many thanks

How did you manage to set a repeating alarm every hour? How to do that? — Akshay Raut, Jun 12 '20 at 06:29

score 57 · Accepted Answer · edited Feb 01 '12 at 13:23

57

Try:

int hour = Calendar.getInstance().get(Calendar.HOUR_OF_DAY);

Calendar.HOUR_OF_DAY gives you the 24-hour time.
Calendar.HOUR gives you the 12-hour time.

edited Feb 01 '12 at 13:23

Yahel

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answered Mar 07 '11 at 19:09

Matthew

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That sorts the second thing I want to use it for and pretty sure it should work for my alarmManager too if i get Calendar.MINUTE I can work out how long til the next top of hour and set repeating alarms from then, thanks a lot man! – bobby123 Mar 08 '11 at 11:57

Android - Find out what hour of day it is

1 Answers1