Simple way to convert ISO8601 date/time to localised date/time

DateUtils.kt

import java.util.TimeZone
import android.text.format.Time
import java.text.SimpleDateFormat
import java.text.DateFormat

/**
 * Created by loop on 24/11/14.
 */

/**
 * This is a singleton.
 */
object DateUtil {
    val utcDateParser = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'").setUTCTimeZone()
    val dateShortFormatter = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.SHORT)

    private fun SimpleDateFormat.setUTCTimeZone(): SimpleDateFormat {
        this.setTimeZone(TimeZone.getTimeZone(Time.TIMEZONE_UTC))
        return this
    }
}

/**
 * Converts ISO 8601 date/time to localized formatted date/time
 */
fun String.pretty(): String {
    val parsed = DateUtil.utcDateParser.parse(this)
    val formatted = DateUtil.dateShortFormatter.format(parsed)
    return formatted
}

test.kt

SmallTest
public fun testStringToFormattedDate() {
    val testDate = "2014-11-03T15:03:11.000Z"
    val formattedDate = testDate.pretty()
    assertEquals("11/3/14 3:03 PM", formattedDate)
}