DaysBetween.kt

fun getDaysBetweenRoundUp(t1: Long, t2: Long): Int {
        val msDiff = t2 - t1
        val daysFraction = msDiff.toFloat() / android.text.format.DateUtils.DAY_IN_MILLIS
        return ceil(daysFraction.toDouble()).toInt()
    }

fun getDaysBetweenRoundUp(c1: Calendar, c2: Calendar): Int {
    return getDaysBetweenRoundUp(c1.timeInMillis, c2.timeInMillis)
}

fun getDaysBetween(t1: Long, t2: Long): Int {
    val msDiff = t2 - t1
    return TimeUnit.MILLISECONDS.toDays(msDiff).toInt()
}

fun getDaysBetween(c1: Calendar, c2: Calendar): Int {
    return getDaysBetween(c1.timeInMillis, c2.timeInMillis)
}