How to get yesterday instance from Calendar?

Question

I have an android app who manipulates dates via java.util.Calendar

When I want to use today's date, I use :

 Date today = Calendar.getInstance().getTime();

I want to know how to manipulate yesterday's date, I've tried multiple syntax but nothing worked, I was thinking about something like

yesterday = today - 24(UNITS.HOURS)

but that's not correct !

So you just took a wild guess of what you could do instead of doing research? http://idownvotedbecau.se/noresearch/ — f1sh, Mar 28 '19 at 09:51
As an aside consider throwing away the long outmoded and poorly designed `Calendar` and `Date`, and adding [ThreeTenABP](https://github.com/JakeWharton/ThreeTenABP) to your Android project in order to use `java.time`, the modern Java date and time API. It is so much nicer to work with. `LocalDate.now(yourTimeZone).minusDays(1)`. — Ole V.V., Mar 28 '19 at 10:00
There’s [a good answer here](https://stackoverflow.com/a/33893147/5772882) (it does a little more than you asked for, just take the part that you need). — Ole V.V., Mar 28 '19 at 10:06

score 1 · Accepted Answer · answered Mar 28 '19 at 09:54

1

Try this :

using this code you will get yesterday date always.

DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
Calendar cal = Calendar.getInstance();
cal.add(Calendar.DATE, -1);
dateFormat.format(cal.getTime());

answered Mar 28 '19 at 09:54

Abhinav Gupta

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score 0 · Answer 2 · answered Mar 28 '19 at 09:54

0

You can try like this:

Calendar cal = Calendar.getInstance();
cal.set(Calendar.DAY_OF_MONTH, (cal.get(Calendar.DAY_OF_MONTH) - 1));
Date yesterDayDate = cal.getTime();

answered Mar 28 '19 at 09:54

Rumit Patel

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Instead of "(cal.get(Calendar.DAY_OF_MONTH) - 1)", only -1 can be written because getInstance method already has returned current date. – Serkan Yıldırım Mar 28 '19 at 09:57
3

@SerkanYıldırım nope. first try it and then tell. – Rumit Patel Mar 28 '19 at 09:59
@SerkanYıldırım it will return only the day of month, while the whole date is required. – Vladyslav Matviienko Mar 28 '19 at 10:01

How to get yesterday instance from Calendar?

2 Answers2