[안드로이드] 날짜 정렬 (Date sort)

 

날짜 형식을 가진 문자열을 정렬하는 방법을 정리합니다.

리스트 정렬 방법으로 sortWith 를 활용합니다.

 

 

 

1. sortWith 활용

val dateList = ArrayList<String>()
dateList.add("2022-04-01 01:10")
dateList.add("2022-04-03 03:11")
dateList.add("2022-04-03 02:10")
dateList.add("2022-04-02 01:10")
dateList.add("2022-04-03 03:10")
dateList.add("2022-04-03 03:12")
dateList.add("2022-02-01 01:10")
dateList.add("2022-04-03 01:10")

Log.d("[TEST]", "Before sorted")
for (date in dateList) {
    Log.d("[TEST]", date)
}

dateList.sortWith { o1, o2 ->
    o2.compareTo(o1) // Reverse : o1.compareTo(o2)
}

Log.d("[TEST]", "After sorted")
for (date in dateList) {
    Log.d("[TEST]", date)
}

 

 

2. 실행 결과

D/[TEST]: Before sorted
D/[TEST]: 2022-04-01 01:10
D/[TEST]: 2022-04-03 03:11
D/[TEST]: 2022-04-03 02:10
D/[TEST]: 2022-04-02 01:10
D/[TEST]: 2022-04-03 03:10
D/[TEST]: 2022-04-03 03:12
D/[TEST]: 2022-02-01 01:10
D/[TEST]: 2022-04-03 01:10
D/[TEST]: After sorted
D/[TEST]: 2022-04-03 03:12
D/[TEST]: 2022-04-03 03:11
D/[TEST]: 2022-04-03 03:10
D/[TEST]: 2022-04-03 02:10
D/[TEST]: 2022-04-03 01:10
D/[TEST]: 2022-04-02 01:10
D/[TEST]: 2022-04-01 01:10
D/[TEST]: 2022-02-01 01:10