startTimer method
void
startTimer()
Implementation
void startTimer() {
const oneSec = Duration(seconds: 1);
startTime = DateTime.now();
_audioTimer = Timer.periodic(
oneSec,
(Timer timer) {
final minDur = DateTime.now().difference(startTime!).inMinutes;
final secDur = DateTime.now().difference(startTime!).inSeconds % 60;
String min = minDur < 10 ? "0$minDur" : minDur.toString();
String sec = secDur < 10 ? "0$secDur" : secDur.toString();
timerInit("$min:$sec");
},
);
}