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androidlocale

List of supported Locale Times

I need to get Locale Time of Nepal but could not get through it. How to get Locale Time for Nepal, which is GMT+5:45? How can I get through it? How to change the Locale, English according to our local time? Here date is in English Standard.

Date d = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss",Locale.ENGLISH).parse(date);
    Calendar cal = Calendar.getInstance();
    cal.setTime(d);
    String timeName = new SimpleDateFormat("hh:mm a").format(cal.getTime());
    return timeName;
Solution

  • The time zone ID to use for Nepal time is Asia/Kathmandu. Time zone IDs generally have the format region/city, where city is the largest populated area in the time zone (not necessarily a capital; for example the time used in Beijing is Asia/Shanghai, and in Delhi it is Asia/Kolkata).

    You get the set of supported time zone IDs from ZoneId.getAvailableZoneIds(). And "Asia/Kathmandu" is a member of the returned set.

    Locale and time zone are different and unrelated concepts (even though each is often associated with a geographical area, but not always). Locale has to do with language and culture, not with time.

    So to convert for example a time of 2018-10-08 20:42:53 in the United Kingdom (England, Northern Ireland, Wales and Scotland) to Nepal time:

        DateTimeFormatter fromFormatter = DateTimeFormatter.ofPattern("uuuu-MM-dd HH:mm:ss");
    ZoneId fromZone = ZoneId.of("Europe/London");
    DateTimeFormatter toTimeFormatter = DateTimeFormatter.ofLocalizedTime(FormatStyle.SHORT)
            .withLocale(Locale.US);
    ZoneId toZone = ZoneId.of("Asia/Kathmandu");

    String englishDateTime = "2018-10-08 20:42:53";
    ZonedDateTime dateTimeInEngland = LocalDateTime
            .parse(englishDateTime, fromFormatter)
            .atZone(fromZone);
    LocalTime timeInNepal = dateTimeInEngland.withZoneSameInstant(toZone)
            .toLocalTime();

    System.out.println(timeInNepal.format(toTimeFormatter));

    Output is:

    1:27 AM

    I am using java.time, the modern Java date and time API. I much prefer it over the outdated date and time classes Date, SimpleDateFormat and Calendar that you used in the question.

    Question: Can I use java.time on Android?

    Yes, java.time works nicely on Android devices. It just requires at least Java 6.

    • In Java 8 and later and on new Android devices (from API level 26, I’m told) the new API comes built-in.
    • In Java 6 and 7 get the ThreeTen Backport, the backport of the new classes (ThreeTen for JSR 310, where the modern API was first described).
    • On (older) Android, use the Android edition of ThreeTen Backport. It’s called ThreeTenABP. Make sure you import the date and time classes from package org.threeten.bp and subpackages.

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