Convert from Long to date format

java.time and ThreeTenABP

I am providing the modern answer. I suggest using java.time, the modern Java date and time API, for your date work. This will work on your Android version:

    // Take Catalan locale as an example for the demonstration
    DateTimeFormatter dateFormatter
            = DateTimeFormatter.ofLocalizedDate(FormatStyle.MEDIUM)
                    .withLocale(Locale.forLanguageTag("ca"));

    long millisecondsSinceEpoch = 1_343_805_819_061L;
    ZonedDateTime dateTime = Instant.ofEpochMilli(millisecondsSinceEpoch)
            .atZone(ZoneId.systemDefault());
    String dateString = dateTime.format(dateFormatter);
    System.out.println("As formatted date: " + dateString);

Output is:

As formatted date: 01/08/2012

I recommend that you use a built-in localized date format for presentation to your user. I took Catalan date format just as an example. Formats for many languages, countries and dialects are built-in.

The SimpleDateFormat class used in most of the old answers is a notorious troublemaker of a class. The Date class also used is poorly designed too. Fortunately they are both long outdated. It’s no longer recommended to use any of those. And I just find java.time so much nicer to work with.

Question: Doesn’t java.time require Android API level 26?

java.time works nicely on both older and newer Android devices. It just requires at least Java 6.

• In Java 8 and later and on newer Android devices (from API level 26) the modern API comes built-in.
• In non-Android Java 6 and 7 get the ThreeTen Backport, the backport of the modern classes (ThreeTen for JSR 310; see the links at the bottom).
• On (older) Android use the Android edition of ThreeTen Backport. It’s called ThreeTenABP. And make sure you import the date and time classes from org.threeten.bp with subpackages.

Links

• Oracle tutorial: Date Time explaining how to use java.time.
• Java Specification Request (JSR) 310, where java.time was first described.
• ThreeTen Backport project, the backport of java.time to Java 6 and 7 (ThreeTen for JSR-310).
• ThreeTenABP, Android edition of ThreeTen Backport
• Question: How to use ThreeTenABP in Android Project, with a very thorough explanation.

if thre is 10 digits in long then try this

long DateInLong= 1584212400;

Date date = new Date(DateInLong*1000L);

SimpleDateFormat simpledateformate= new SimpleDateFormat("yyyy-MM-dd");

String DATE = simpledateformate.format(date);

    public String getDuration(long msec) {
        if (msec == 0)
            return "00:00";
        long sec = msec / 1000;
        long min = sec / 60;
        sec = sec % 60;
        String minstr = min + "";
        String secstr = sec + "";
        if (min < 10)
            minstr = "0" + min;
        if (sec < 10)
            secstr = "0" + sec;
        return minstr + ":" + secstr;
    }