protected override void OnCreate(Bundle bundle)
{
RequestWindowFeature(WindowFeatures.NoTitle);
base.OnCreate(bundle);
SetContentView(Resource.Layout.TimerView);
//Get the data passed into this view.
var hours = Intent.GetIntExtra("hours", 0);
var minutes = Intent.GetIntExtra("minutes", 0);
var questions = Intent.GetIntExtra("questions", 0);
//Validate the data. If it doesn't pass, navigate back.
if (hours == 0 && minutes == 0 || questions == 0)
{
OnBackPressed();
}
//Keep the screen alive so it doesn't go into sleep mode.
Window.SetFlags(WindowManagerFlags.KeepScreenOn, WindowManagerFlags.KeepScreenOn);
//Get references to our UI controls
_questionTimeText = FindViewById<AutoScaleToWidthTextView>(Resource.Id.questionTimeRemainingTextView);
_testTimeText = FindViewById<AutoScaleToWidthTextView>(Resource.Id.testTimeRemainingTextView);
_questionsRemainingText = FindViewById<AutoScaleToWidthTextView>(Resource.Id.questionsRemainingTextView);
_prevButton = FindViewById<Button>(Resource.Id.prevQuestionButton);
_nextButton = FindViewById<Button>(Resource.Id.nextQuestionButton);
//Store the default background for the TextView that shows the amount of time left for the current question.
_questionTimeTextDefaultBackground = _questionTimeText.Background;
//Start the countdown timer object using the data passed into this Activity.
_timer = new TestCoundownTimer(hours, minutes, questions, new SynchronizeInvoke() { Activity = this });
//Update the relevant TextView controls every second.
_timer.TimerUpdated += (sender, args) =>
{
_questionTimeText.Text = args.TimeRemainingForCurrentQuestionText;
_testTimeText.Text = args.TotalTimeRemainingText;
_questionsRemainingText.Text = args.QuestionsRemaining;
};
//Listen for the stopped event of the timer.
_timer.TimerStopped += OnTimerOnTimerStopped;
//Change the background color of the TextView containing the time remaining for the current question to red when it is negative.
_timer.QuestionTimeRemainingNegative += (sender, args) =>
{
_questionTimeText.Background = new ColorDrawable(Color.Red);
};
//Change the background color of the TextView containing the time remaining for the current question back to its default when it is positive.
_timer.QuestionTimeRemainingPositive += (sender, args) =>
{
_questionTimeText.Background = _questionTimeTextDefaultBackground;
};
//Start our timer object.
_timer.Start();
//Update our Next and Previous buttons so they are properly enabled/disabled.
UpdateButtons();
//When the next button is clicked, alert the countdown timer object so it can update its calculations.
_nextButton.Click += (sender, args) =>
{
_timer.NextQuestion();
UpdateButtons();
};
//When the previous button is clicked, alert the countdown timer object so it can update its calculations.
_prevButton.Click += (sender, args) =>
{
_timer.PreviousQuestion();
UpdateButtons();
};
}
//Cleanup code.
protected override void OnStop()
{
if (_timer != null && _timer.State != CountdownTimerStates.Stopped)
{
_timer.Stop(false);
}
_timer = null;
base.OnStop();
}
