public void Tick()
{
var result = Interlocked.Decrement(ref _counter);
if (result == 0)
{
Set();
CountdownCompleted?.Invoke();
}
else if (result < 0)
{
throw new InvalidOperationException("CountdownEvent has been decremented more times than allowed!");
}
}
private void UpdateDisplayTextView(object sender, ElapsedEventArgs args)
{
if (_remainingTime == null)
{
throw new ArgumentNullException(nameof(_remainingTime));
}
_remainingTime = _remainingTime.Value.Subtract(TickInterval);
if (_remainingTime.Value.Seconds > 0)
{
_activity.RunOnUiThread(() =>
_displayTextView.Text = $"{_remainingTime.Value.Minutes:D2}:{_remainingTime.Value.Seconds:D2}"
);
}
else
{
StopAndZeroDisplay();
CountdownCompleted?.Invoke(sender, args);
}
}