Wrangling Dates & Time in Android

Dec 15 2022 · Kotlin 1.6.21, Android 13, IntelliJ 2022.1

Part 1: Wrangling Dates & Time in Android

03. Use Duration, Period & ChronoUnit to Calculate Time

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Previous episode: 02. Work With Instant Next episode: 04. Store Dates & Times Using Date Classes

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When you write code to specify an amount of time, you should use the class or method that best meets your needs. In this lecture, you’ll see three different classes: Period, Duration, and ChronoUnit.

val betweenWithDuration = Duration.between(Instant.EPOCH, Instant.now())
val daysInBetweenWithDuration = betweenWithDuration.toDays()
val birthDay = LocalDate.of(1999, Month.DECEMBER, 29)
val today = LocalDate.now()
val ageWithPeriod = Period.between(birthDay, today)
    "You are ${ageWithPeriod.years} years, " +
      "${ageWithPeriod.months} moths " +
      "and ${ageWithPeriod.days} days old"
val ageWithChrono = ChronoUnit.DAYS.between(birthDay, today)
println("ageWithChrono: $ageWithChrono days")