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android – How can I convert a Long value to date time and convert current time to Long kotlin?

Posted by: admin June 15, 2020 Leave a comment

Questions:

The Code A can convert a long value to date value, just like 2018.01.10

  1. I hope to get Date + Time value , such as 2018.01.10 23:11, how can I do with Kotlin?

  2. I hope to convert current time to a long value , how can I do with Kotlin?

Thanks!

Code A

fun Long.toDateString(dateFormat: Int =  DateFormat.MEDIUM): String {
    val df = DateFormat.getDateInstance(dateFormat, Locale.getDefault())
    return df.format(this)
}
How to&Answers:

Try this, I use SimpleDataFormat.

fun convertLongToTime(time: Long): String {
    val date = Date(time)
    val format = SimpleDateFormat("yyyy.MM.dd HH:mm")
    return format.format(date)
}

fun currentTimeToLong(): Long {
    return System.currentTimeMillis()
}

fun convertDateToLong(date: String): Long {
    val df = SimpleDateFormat("yyyy.MM.dd HH:mm")
    return df.parse(date).time
}

And to convert java file to kotlin file with Android Studio, choosing Code->Convert java file to kotlin file.