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javaandroidkotlindatezoneddatetime

ZonedDateTime localized format

I want to display ZonedDateTime in format like

11.10.2022 13:30 (GMT+2) / 11.10.2022 01:30 PM (GMT+2)

depending on device settings. So far I have done something similar using formatDateTime function from DateUtils class, but this function doesn't display

(GMT+2)

It takes time in milliseconds as a argument. How can I do this with ZonedDateTime?

Solution

  • Use DateTimeFormatter helper from java.time.format to format ZonedDateTime, for example:

    val time = ZonedDateTime.now()
val formatter = DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm (O)")
formatter.format(time) // will return time in format 11.10.2022 13:30 (GMT+2)

    See which symbols you can use to construct the pattern in the official docs.

    To implement your particular case, you can also use DateTimeFormatterBuilder:

    val time = ZonedDateTime.now()
val formatter = DateTimeFormatterBuilder()
    .appendPattern("dd.MM.yyyy ")
    .appendLocalized(null, FormatStyle.SHORT)
    .appendPattern(" (O)")
    .toFormatter()
formatter.format(time) // will return time depending on Locale

    The last line of the code will return time in the desired format:

    11.10.2022 13:30 (GMT+2) / 11.10.2022 01:30 PM (GMT+2)

    Depending on device Locale:

    Locale.FRANCE / Locale.US