public async void populateChoices(View view)
{
//query to server
int id = -1;
options = new List <Option> (await LessonUtil.GetOptionsByScreenAsync(lesson_id, screen.Id + ""));
var activity = Activity as ScreensActivity;
if (activity.answer.ContainsKey(screen.Id))
{
id = int.Parse(activity.answer [screen.Id]);
}
for (int i = 0; i < options.Count; i++)
{
Option option = options [i];
if (option != null)
{
RadioButton rdBtn = new RadioButton(Application.Context);
rdBtn.Id = (i);
if (!option.Title.Contains("."))
{
rdBtn.Text = Utils.populateSelection(option.Order) + ". " + option.Title;
}
rdBtn.SetTextSize(ComplexUnitType.Sp, 18.0f);
if (i == id)
{
//set checked
rdBtn.Checked = true;
}
choicesRadioGroup.AddView(rdBtn);
}
}
//remove default selected
if (id == -1)
{
(choicesRadioGroup as RadioGroup).ClearCheck();
}
activity.validateBtns();
}
private async void getCorrectAnswerFromServer()
{
//get correct answer
foreach (var screen in Constants.screens)
{
string type = screen.Type;
if (type != null)
{
if (type.Equals("question") || type.Equals("audio_question") || type.Equals("question_audio"))
{
IList <Option> list = await LessonUtil.GetOptionsByScreenAsync(Intent.GetIntExtra(Constants.LESSON_ID, 0), screen.Id + "");
options = new List <Option> (list);
foreach (var option in options)
{
if (option.Detail == true)
{
correctAnswers.Add(screen.Id, option.Id);
switch (option.Order)
{
case 0:
standardAnswer.Add("A");
break;
case 1:
standardAnswer.Add("B");
break;
case 2:
standardAnswer.Add("C");
break;
case 3:
standardAnswer.Add("D");
break;
case 4:
standardAnswer.Add("E");
break;
case 5:
standardAnswer.Add("F");
break;
case 6:
standardAnswer.Add("G");
break;
default:
standardAnswer.Add("H");
break;
}
}
}
}
}
}
//send answer to server
await SendLessonAnswers(Intent.GetIntExtra(Constants.LESSON_ID, 0), Constants.screenAnswers);
//judge how many right
foreach (var answer in Constants.screenAnswers)
{
if (correctAnswers.ContainsKey(answer.ScreenId))
{
if (correctAnswers [answer.ScreenId] == answer.OptionId)
{
//correct
correct++;
right.Add(true);
}
else
{
right.Add(false);
}
}
}
//complement
for (int i = right.Count; i < standardAnswer.Count; i++)
{
right.Add(false);
}
//set adapter
adapter = new ResultListViewAdapter(this);
lv_score.Adapter = adapter;
pb_anti.Max = standardAnswer.Count;
pb_anti.Progress = correct;
int score = (int)((correct / (float)standardAnswer.Count) * 100);
if (score <= 50)
{
tv_initiate.SetTextColor(Color.Red);
}
else
{
tv_initiate.SetTextColor(Color.Green);
}
tv_initiate.Text = "Score:" + score;
}