Android: How do you format date with local mobile configuration AND WITH year on 2 digit?

Question

Currently, I format the date like that:

DateFormat timeFormat = android.text.format.DateFormat.getDateFormat(
            MyApplication.getInstance().getApplicationContext());
String dateFormatted = timeFormat.format(dateTime.toDate());

The result is for example: "23-07-2016" (for french mobile); or "16-07-23" (for canadian mobile), etc.

In all cases, I want year is formatted on 2 digits: "23-07-2016" will become "23-07-16" "16-07-23" will stay the same ...

Ps: for information I use Yoda Date Time library.

How to do that please?

is this of help? https://stackoverflow.com/questions/26102295/joda-time-datetime-formatting-based-on-locale — sschrass, Oct 01 '16 at 15:50
With Joda-Time get the locale-specific short date pattern from `DateTimeFormat.patternForStyle("S-", Locale.getDefault())`. Use a regexp to replace any run of letters `y` with exactly `yy` to ensure two-digit year. Construct a formatter from `DateTimeFormat.forPattern()`. Format your date-time with it. Unfortunately the answers posted below use `DateFormat` and `SimpleDateFormat`, which is the last thing you should wish to do. — Ole V.V., Feb 11 '23 at 07:25

Peri Hartman · Answer 1 · 2016-10-01T17:37:01.980

0

Try using SimpleDateFormat, for example:

long date = <your UTC time in milliseconds>;
SimpleDateFormat formatter = new SimpleDateFormat ("d-MM-yyyy");
String s = formatter.format (date);

See API spec for details.

If by "android mobile format" you mean the date format which the user selected in android settings, you can get this value with

android.text.format.DateFormat.getDateFormat(context)

as you show in your sample code. After that, you'll probably need to parse it and substitute 4 digit year patterns with 2 digit year patterns and finish by using SimpleDateFormat as I show above.

edited Oct 01 '16 at 17:37

answered Oct 01 '16 at 14:56

Peri Hartman

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No I want to keep the Android mobile format, AND just to have the year on 2 digits. – anthony Oct 01 '16 at 15:31
Added to my answer, above. – Peri Hartman Oct 01 '16 at 17:37

score 0 · Answer 2 · answered Oct 01 '16 at 18:47

OK I found a great solution. It's a workaround to modify directly the original pattern:

DateFormat timeFormat = DateFormat.getDateFormat(
            MyApplication.getInstance().getApplicationContext());

    if (timeFormat instanceof SimpleDateFormat) {
        String pattern = ((SimpleDateFormat) timeFormat).toPattern()
        // Change year format on 2 digits
        pattern = pattern.replaceAll("yyyy", "yy");            
        timeFormat = new SimpleDateFormat(pattern);
    }      

    return timeFormat.format(dateTime.toDate());

Thanks guys

score 0 · Answer 3 · answered Feb 10 '23 at 12:29

0

I made a few adjustments:

public static String formatDate2DigitYear(@Nullable Date date) {
    if (date == null)
        return "";

    DateFormat dateFormat = android.text.format.DateFormat.getDateFormat(App.get());

    if (dateFormat instanceof SimpleDateFormat) {
        String pattern = ((SimpleDateFormat) dateFormat).toPattern();

        if (pattern.matches("^[^y]*yyyy[^y]*$")) {
            pattern = pattern.replaceAll("yyyy", "yy");
        } else if (pattern.matches("^[^y]*y[^y]*$")) {
            pattern = pattern.replaceAll("y", "yy");
        }

        dateFormat = new SimpleDateFormat(pattern, Locale.getDefault());
    }

    return dateFormat.format(date);
}

answered Feb 10 '23 at 12:29

Pavel Poley

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The question informs us that the OP is using Joda-Time. So a answer using `SimpleDateFormat` and `Date` is a step backward. Those classes are poorly designed and long outdated. I recommend you don’t use them at all. – Ole V.V. Feb 11 '23 at 06:59
With Joda-Time get the locale-specific short date pattern from `DateTimeFormat.patternForStyle("S-", Locale.getDefault())`. Use a regexp to replace any run of letters `y` with exactly `yy` to ensure two-digit year the way you already do. Construct a formatter from `DateTimeFormat.forPattern()`. Format your date-time with it. – Ole V.V. Feb 11 '23 at 07:26

Android: How do you format date with local mobile configuration AND WITH year on 2 digit?

3 Answers3