flutter time count
Timer _timer;
int seconds = 0;
int minutes = 0;
int hours = 0;
void startTimer() {
const oneSec = const Duration(seconds: 1);
_timer = new Timer.periodic(
oneSec,
(Timer timer) => setState(
() {
if (seconds < 0) {
timer.cancel();
} else {
seconds = seconds + 1;
if (seconds > 59) {
minutes += 1;
seconds = 0;
if (minutes > 59) {
hours += 1;
minutes = 0;
}
}
}
},
),
);
}