How to use Chronometer Control in android

This article mainly introduces how to use the Chronometer control in android, which is very detailed and has certain reference value. Friends who are interested must finish reading it!

1. Preface

Chronometer is officially provided by android timer, can achieve forward / countdown, fixed format: 00:00:00

2. Use

As shown in the picture, xml

The simplified writing of xml is as follows:

3. Start the countdown tvEndTime.run {/ / format-> from the end 00:00:00 format = "% s" / / set the countdown time countDownTimeMill-"Custom unit millisecond base = countDownTimeMill + SystemClock.elapsedRealtime () / / whether it is the countdown, IsCountDown = true / / countdown monitoring ends every second setOnChronometerTickListener {/ / countdown ends if (SystemClock.elapsedRealtime ()-it.base > = 0) {it.stop () return@setOnChronometerTickListener / / TODO: 2021max 9 / 16 processing business logic} 4. Custom format tvEndTime.run {/ / format-> from the end 00:00:00 format = "from the end% s" / / set the countdown base = countDownTimeMill + SystemClock.elapsedRealtime () / / whether it is the countdown, IsCountDown = true / / countdown monitoring every second setOnChronometerTickListener {/ / countdown ends if (SystemClock.elapsedRealtime ()-it.base > = 0) {it.stop () return@setOnChronometerTickListener / / Custom date grid The formula is like 23:02:56 it.text = TimeUtils.formatSecondByMill (86400 * 1000)}.

Tool class:

Object TimeUtils {/ * send message date format * * @ param msgTimeMillis * @ return * / fun getMsgFormatTime (msgTimeMillis: Long): String? {val nowTime = Date () val msgTime = Date (msgTimeMillis) val days = differentDays (msgTime) NowTime) / / in the morning, afternoon, 1:40 evening val hourOfDay = DateUtils.getHour (msgTime) val whens: String = when {hourOfDay > = 18-> {/ / 18-24 "evening"} hourOfDay > = 13-> {/ / 13-18 "afternoon"} hourOfDay > = 11-> {/ / 11-13 "noon"} hourOfDay > = 5-> {/ / 5-11 "morning"} else-> {/ / 0-5 "morning"}} return if (days

< 1) { whens + " " + DateUtils.format(msgTime, "HH:mm") } else { // 昨天 // return DateUtils.format(new Date(msgTimeMillis), "yyyy年MM月dd日 ") + when + DateUtils.format(new Date(msgTimeMillis), " HH:mm"); DateUtils.format(Date(msgTimeMillis), "yyyy年MM月dd日 ") } } /** * date2比date1多的天数 * @param date1 * @param date2 * @return */ private fun differentDays(msgTime: Date, nowTime: Date): Int { val cal1 = Calendar.getInstance() cal1.time = msgTimeval cal2 = Calendar.getInstance() cal2.time = nowTimeval day1 = cal1[Calendar.DAY_OF_YEAR] val day2 = cal2[Calendar.DAY_OF_YEAR] val year1 = cal1[Calendar.YEAR] val year2 = cal2[Calendar.YEAR] return if (year1 != year2) //同一年 { var timeDistance = 0 for (i in year1 until year2) { timeDistance += if (i % 4 == 0 && i % 100 != 0 || i % 400 == 0) //闰年 { 366 } else //不是闰年 { 365 } } timeDistance + (day2 - day1) } else //不同年 { day2 - day1 } } /** * 格式化秒数 * des:d 长度不够2位的时前面补0 */ fun formatSeconds(seconds: Long): String? { return when { seconds { "00:00" } seconds < 60 ->

{String.format (Locale.getDefault (), "00seconds d", seconds% 60)} seconds

< 3600 ->

{String.format (Locale.getDefault (), "seconds d", seconds / 60, seconds% 60)} else-> {String.format (Locale.getDefault (), "d:d:d", seconds / 3600, seconds% 3600 / 60) Seconds% 60)}} fun formatSecond (seconds: Long): String? {return when {seconds {"0"} seconds

< 60 ->

{String.format (Locale.getDefault (), "d seconds", seconds% 60)} seconds

< 3600 ->

{String.format (Locale.getDefault (), "d minutes d seconds", seconds / 60, seconds% 60)} else-> {String.format (Locale.getDefault (), "d hours and d minutes", seconds / 3600, seconds% 3600 / 60) )}} / * format date eg day hours: minutes: 00:00:00 seconds * @ param dayUnit units do not write * / fun formatSecondByMill (millTime: Long, dayUnit: String = "days"): String? {/ / less than one day, unit millisecond return if (millTime)