secToTime static method
int 转 显示时间
Implementation
static String secToTime(int mseconds) {
if (mseconds == 0) return '00 : 00 : 00';
int seconds = mseconds ~/ 1000;
int hour = seconds ~/ 3600;
int minute = (seconds - hour * 3600) ~/ 60;
int second = (seconds - hour * 3600 - minute * 60);
final showHour = hour < 10 ? '0$hour' : hour;
final showMinute = minute < 10 ? '0$minute' : minute;
final showSecond = second < 10 ? '0$second' : second;
return '$showHour : $showMinute : $showSecond';
}