android - Showing correct sunrise/sunset times using unix timestamp

Question

I'm getting a UNIX timestamp from DarkSkyApi for the sunrise & sunset times for the selected location and i want to convert it to a DateTime format and display it to the user. I want the time values to be local.

Example case : The user is in Italy and selects "Tokyo, JP" as the desired location to fetch weather info for. The sunrise & sunset time values should be formatted & shown as local times. So for Tokyo, sunrise should be something around 4:34 AM & 18:36 PM for sunset.

With what i have right now, i'm getting wrong values such as 12:17 for sunrise & 2:29 for sunset. Any ideas on what i'm doing wrong here?

P.S. The tmz var is the timezone of the selected location , so in this case it would be "Asia/Tokyo". Here's what i'm doing right now for the sunset time (same for the sunrise time):

private fun setViewHolderWeekDaySunsetTime(holder: ViewHolder, sunsetTime: Long, tmz: String) {
    val dt = Instant.ofEpochSecond(sunsetTime).atZone(
        ZoneId.of(tmz)
    )
    val formatted = dt.format(DateTimeFormatter.ofPattern("HH:mm"))
    holder.weekDaySunsetTime.text = formatted
}

Answer 1

it sounds like the api is returning different time zones depending on what city you request data

So taking that into consideration, when converting the timestamp to a datetime object, you need to do something like this:

import java.time.*

val dt = Instant.ofEpochSecond(/*put time value here*/)
                .atZone(/*put time zone here*/)
                .toLocalDateTime() //this will convert it to your system's date time