formatDurationTime static method
格式化时间长度
Implementation
static String formatDurationTime(int millis) {
final seconds = (millis / 1000).round();
final h = (seconds / 3600).floor();
final m = ((seconds % 3600) / 60).floor();
final s = seconds - h * 3600 - m * 60;
return '${h < 10 ? '0' : ''}$h:${m < 10 ? '0' : ''}$m:${s < 10 ? '0' : ''}$s';
}