CODEWITHSUNDEEP
androidtimestamp
WonGyeong
WonGyeong

Reputation: 139

Can I convert only time into timestamp?

I'm trying to measure time while a user plays a game and I have to store that playing time to database. (I will use it later to make a rank.)

I've heard that I'd better use timestamp if the data I want to store is about time.

But after I searched, I could only see the examples that converting 'date'&time to timestamp. I only need to store playing time without date, so I'm wondering if it's possible.

If it is, please give me some examples too. Thank you.

Upvotes: 0

Views: 116

Answers (1)

Jake Lee
Jake Lee

Reputation: 7989

As a commenter said, I strongly recommend using date & time. However, if you really want / need to just use time:

    Calendar cal = Calendar.getInstance();
    cal.set(Calendar.HOUR_OF_DAY, 0);
    cal.set(Calendar.MINUTE, 0);
    cal.set(Calendar.SECOND, 0);
    cal.set(Calendar.MILLISECOND, 0);
    long timestamp = cal.getTimeInMillis() - System.currentTimeMillis();

This creates a calendar, sets it to last midnight, and get the number of milliseconds since then.

Upvotes: 1

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