public async override void RowSelected(UITableView tableView, Foundation.NSIndexPath indexPath)
{
// Loading indicator
var loadingOverlay = new LoadingOverlay(Container.View.Bounds);
Container.View.Add(loadingOverlay);
IList <Screen> screens = null;
try
{
screens = (await LessonUtil.GetScreensByLessonAsync(Items[indexPath.Row].Id));
}
catch (Exception e)
{
var alert = UIAlertController.Create("Something goes wrong", String.Format("Please check your Internet connection and try again.{0} Details: {1}", Environment.NewLine, e.Message), UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
Container.PresentViewController(alert, true, null);
}
loadingOverlay.HideThenRemove();
if ((screens != null) && (screens.Count > 0))
{
Container.NavigationController.PushViewController(new LessonScreenViewController(Items[indexPath.Row].Id, screens, 0, new List <ScreenAnswer>()), true);
}
else
{
var alert = UIAlertController.Create("Oops!", "There is nothing in this lesson.", UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
Container.PresentViewController(alert, true, null);
}
tableView.DeselectRow(indexPath, true);
}
private async Task getScreenFromServer()
{
try {
screens = await LessonUtil.GetScreensByLessonAsync(lesson_id);
} catch (Exception ex) {
DialogFactory.ToastDialog(this, "Data Error", "Error Connecting to Server,please try again later!", Constants.TEXT_ERROR);
}
if (screens != null)
{
//make text and images
screen = screens [0];
string type = screen.Type;
if (type.Contains("text"))
{
var texts = screen.Texts;
Utils.makeTextViews(texts, this, ll_content, Color.Black);
}
if (type.Contains("image"))
{
var imageslist = screen.Images;
var images = new List <Image> (imageslist);
Utils.makeTextImages(this, ll_content, images);
}
//make return button
Utils.makeReturnButton(this, ll_content);
ll_content.Visibility = ViewStates.Visible;
ll_load.Visibility = ViewStates.Invisible;
}
}
public async Task getDataFromServer()
{
IList <Lesson> lessons = null;
try {
lessons = await LessonUtil.GetLessonsByModuleAsync(module_id);
} catch (Exception ex) {
DialogFactory.ToastDialog(this, "Data Error", "Error Connecting to Server,please try again later!", Constants.LESSON_ERROR);
}
if (lessons != null)
{
sourceDateList = new List <SortModel> ();
foreach (var lesson in lessons)
{
string name = lesson.Title;
if (name.Length > 0)
{
string firstAlpha = name.Substring(0, 1).ToUpper();
SortModel temp = new SortModel();
temp.SortLetters = firstAlpha;
temp.Name = name;
temp.LessonId = lesson.Id;
temp.ScreenCount = lesson.ScreenCount;
sourceDateList.Add(temp);
}
else
{
continue;
}
}
sourceDateList.Sort();
}
}
public async override void RowSelected(UITableView tableView, Foundation.NSIndexPath indexPath)
{
// Loading indicator
var loadingOverlay = new LoadingOverlay(Container.View.Bounds);
Container.View.Add(loadingOverlay);
IList <Lesson> lessons = null;
try
{
lessons = await LessonUtil.GetLessonsByModuleAsync(Items[indexPath.Row].Id);
}
catch (Exception e)
{
var alert = UIAlertController.Create("Something goes wrong", e.Message, UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
Container.PresentViewController(alert, true, null);
}
loadingOverlay.HideThenRemove();
if ((lessons != null) && (lessons.Count > 0))
{
Container.NavigationController.PushViewController(new LessonsViewController(lessons, Items[indexPath.Row].Name), true);
}
else
{
var alert = UIAlertController.Create("Oops!", "There is nothing in this module", UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
Container.PresentViewController(alert, true, null);
}
tableView.DeselectRow(indexPath, true);
}
public async void getLessonsFromServer()
{
try {
var lessons = await LessonUtil.GetLessonsByModuleAsync(module_id);
lessonList = new List <Lesson> (lessons);
} catch (Exception ex) {
DialogFactory.ToastDialog(this, "Server busy", "Server is busy,please drag down to refresh later", 0);
tv_pull_list_header_title.Text = "Server busy!";
tv_pull_list_header_title.SetTextColor(Color.Red);
}
if (lessonList != null)
{
lv_list.onRefreshComplete();
lv_list.Adapter = new MyListViewAdapter(this, lessonList);
lv_list.setOnRefreshListener(new MyRefreshListener(this));
lv_list.Visibility = ViewStates.Visible;
ll_load.Visibility = ViewStates.Invisible;
}
}
public async override void ViewDidLoad()
{
base.ViewDidLoad();
View.BackgroundColor = UIColor.White;
var modulesTable = new UITableView();
View.AddSubview(modulesTable);
View.ConstrainLayout(() =>
modulesTable.Frame.Top == View.Frame.Top &&
modulesTable.Frame.Left == View.Frame.Left &&
modulesTable.Frame.Right == View.Frame.Right &&
modulesTable.Frame.Bottom == View.Frame.Bottom
);
// Loading indicator
var loadingOverlay = new LoadingOverlay(View.Bounds);
View.AddSubview(loadingOverlay);
try
{
Modules = await LessonUtil.GetModulesAsync();
}
catch (Exception e)
{
var alert = UIAlertController.Create("Something goes wrong", e.Message, UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
if (Modules != null)
{
modulesTable.Source = new ModulesTableSource(this, Modules);
modulesTable.ReloadData();
}
loadingOverlay.HideThenRemove();
}
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 getVideoUrlFromServer()
{
var result = await LessonUtil.GetScreensByLessonAsync(lessonId);
if (result != null && result.Count > 0)
{
Constants.screens = result;
//jump to screenactivity
Intent intent = new Intent(this, typeof(ScreensActivity));
intent.PutExtra(Constants.LESSON_TITLE, currentLesson.Title);
intent.PutExtra(Constants.LESSON_DES, currentLesson.Description);
intent.PutExtra(Constants.LESSON_ID, currentLesson.Id);
StartActivity(intent);
Finish();
}
else
{
lv_list.Visibility = ViewStates.Visible;
ll_load.Visibility = ViewStates.Invisible;
DialogFactory.ToastDialog(this, "Empty lesson", "Oops,this lesson has not uploaded yet!", 0);
}
}
public async void getModulesFromServer()
{
try {
var modules = await LessonUtil.GetModulesAsync();
Constants.currentUser = await UserUtil.GetCurrentUserAsync();
moduleList = new List <Module> (modules);
} catch (Exception ex) {
DialogFactory.ToastDialog(activity, "Server busy", "Server is busy,please login later", Constants.LOGIN_TIMEOUT);
}
if (Constants.currentUser == null)
{
//illegal login
DialogFactory.ToastDialog(activity, "Login timeout", "Timeout,please login again", Constants.LOGIN_TIMEOUT);
}
else
{
lv_list.Adapter = new MyModuleListAdapter(moduleList, this.activity);
lv_list.Visibility = ViewStates.Visible;
ll_load.Visibility = ViewStates.Invisible;
}
}
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;
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
#region Navigation Bar Buttons
if (Index < Screens.Count - 1)
{
NavigationItem.SetRightBarButtonItem(new UIBarButtonItem("Next", UIBarButtonItemStyle.Plain, async(sender, e) =>
{
if (SelectedOptionId != Constants.DefaultOptionId)
{
// Workaround for not having current user in database
User currentUser = null;
try
{
currentUser = await UserUtil.GetCurrentUserAsync();
}
catch
{
var alert = UIAlertController.Create("Something goes wrong", "Please check your Internet connection and try again.", UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
if (currentUser == null)
{
var alert = UIAlertController.Create("Something goes wrong", "Please check your Internet connection, sign out and try again.", UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
else
{
Answers.RemoveAll(x => x.ScreenId == Screens[Index].Id);
Answers.Add(new ScreenAnswer
{
// UserId = UserUtil.CurrentUser.Id.GetValueOrDefault(),
UserId = currentUser.Id.GetValueOrDefault(),
ScreenId = Screens[Index].Id,
OptionId = SelectedOptionId,
});
}
}
PushNextScreen();
}), true);
}
else
{
NavigationItem.SetRightBarButtonItem(new UIBarButtonItem("Submit", UIBarButtonItemStyle.Plain, async(sender, e) =>
{
#region Add Answer
if (SelectedOptionId != Constants.DefaultOptionId)
{
// Workaround for not having current user in database
User currentUser = null;
try
{
currentUser = await UserUtil.GetCurrentUserAsync();
}
catch
{
var alert = UIAlertController.Create("Something goes wrong", String.Format("Please check your Internet connection and try again."), UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
if (currentUser == null)
{
var alert = UIAlertController.Create("Something goes wrong", String.Format("Please check your Internet connection and try again."), UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
else
{
Answers.RemoveAll(x => x.ScreenId == Screens[Index].Id);
Answers.Add(new ScreenAnswer
{
// UserId = UserUtil.CurrentUser.Id.GetValueOrDefault(),
UserId = currentUser.Id.GetValueOrDefault(),
ScreenId = Screens[Index].Id,
OptionId = SelectedOptionId,
});
}
}
#endregion
#region Send Answers to server
if ((Answers != null) && (Answers.Count > 0))
{
var loadingOverlay = new LoadingOverlay(View.Bounds);
Tuple <string, int, int> response = null;
try
{
View.Add(loadingOverlay);
response = await LessonUtil.SendLessonAnswers(LessonId, Answers);
}
catch (Exception ex)
{
var alert = UIAlertController.Create("Something goes wrong", ex.Message, UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
finally
{
loadingOverlay.HideThenRemove();
}
if (response != null)
{
var alertTitle = response.Item1;
var alertMessage = String.Format("Your result: {0}/{1}", response.Item3, response.Item2);
var submissionAlert = UIAlertController.Create(alertTitle, alertMessage, UIAlertControllerStyle.Alert);
submissionAlert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, (UIAlertAction obj) =>
{
NavigationController.PopToRootViewController(true);
}));
PresentViewController(submissionAlert, true, null);
}
}
else
{
var alert = UIAlertController.Create("Nothing to submit", "You haven't selected any answer", UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
#endregion
}), true);
}
#endregion
View.BackgroundColor = UIColor.White;
var scrollView = new UIScrollView();
View.AddSubview(scrollView);
View.ConstrainLayout(() =>
scrollView.Frame.Top == View.Frame.Top &&
scrollView.Frame.Left == View.Frame.Left &&
scrollView.Frame.Right == View.Frame.Right &&
scrollView.Frame.Bottom == View.Frame.Bottom
);
var stackView = new UIStackView
{
Axis = UILayoutConstraintAxis.Vertical,
Alignment = UIStackViewAlignment.Leading,
Distribution = UIStackViewDistribution.EqualSpacing,
Spacing = Constants.BigGap,
};
scrollView.AddSubview(stackView);
var twiceHorizontalPad = Constants.HorizontalPad * 2;
View.ConstrainLayout(() =>
stackView.Frame.Top == scrollView.Frame.Top + Constants.VerticalPad &&
stackView.Frame.Bottom == scrollView.Frame.Bottom - Constants.VerticalPad &&
stackView.Frame.Left == scrollView.Frame.Left + Constants.HorizontalPad &&
stackView.Frame.Right == scrollView.Frame.Right + Constants.HorizontalPad &&
stackView.Frame.Width == scrollView.Frame.Width - twiceHorizontalPad // required!
);
scrollView.ContentSize = stackView.Frame.Size;
var mediaPlayerUrl = !String.IsNullOrWhiteSpace(Screens[Index].VideoUrl) ? Screens[Index].VideoUrl : Screens[Index].AudioUrl;
if (!String.IsNullOrWhiteSpace(mediaPlayerUrl))
{
try
{
MediaPlayer = new AVPlayer(NSUrl.FromString(mediaPlayerUrl));
}
catch (Exception ex)
{
// Display error or skip this part !!
// throw ex;
var alert = UIAlertController.Create("Something goes wrong", "Invalid format for video or audio data", UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
var playerViewController = new AVPlayerViewController
{
Player = MediaPlayer,
};
AddChildViewController(playerViewController);
stackView.AddArrangedSubview(playerViewController.View);
View.ConstrainLayout(() =>
playerViewController.View.Frame.Width == stackView.Frame.Width
);
if (String.IsNullOrWhiteSpace(Screens[Index].VideoUrl))
{
View.ConstrainLayout(() =>
playerViewController.View.Frame.Height == Constants.AudioPlayerHeight
);
}
}
if (Screens[Index].Images != null)
{
foreach (var image in Screens[Index].Images)
{
var imageView = new UIImageView();
imageView.ContentMode = UIViewContentMode.ScaleAspectFit;
try
{
using (var url = new NSUrl(image.Url))
{
using (var data = NSData.FromUrl(url))
{
imageView.Image = UIImage.LoadFromData(data);
}
}
}
catch (Exception ex)
{
// Display error!!
// throw ex;
var alert = UIAlertController.Create("Something goes wrong", "Invalid format for image data", UIAlertControllerStyle.Alert);
alert.AddAction(UIAlertAction.Create("OK", UIAlertActionStyle.Default, null));
PresentViewController(alert, true, null);
}
var imageRatio = imageView.IntrinsicContentSize.Width / imageView.IntrinsicContentSize.Height;
var stackViewWidth = View.Frame.Width - twiceHorizontalPad;
var resizedHeight = stackViewWidth / imageRatio; // Pretty hacky!! Maybe can achieve the same thing by setting vertical hugging priority?
stackView.AddArrangedSubview(imageView);
View.ConstrainLayout(() =>
imageView.Frame.Height == resizedHeight
);
}
}
if (Screens[Index].Texts != null)
{
foreach (var text in Screens[Index].Texts)
{
var textLabel = new UILabel
{
Text = text.TextValue,
Lines = 0,
LineBreakMode = UILineBreakMode.WordWrap,
Font = UIFont.SystemFontOfSize(Constants.LargeFontSize),
};
stackView.AddArrangedSubview(textLabel);
View.ConstrainLayout(() =>
textLabel.Frame.Width == stackView.Frame.Width
);
}
}
if (Screens[Index].Options != null)
{
// Question
var questionLabel = new UILabel
{
Text = Screens[Index].Question,
Lines = 0,
LineBreakMode = UILineBreakMode.WordWrap,
Font = UIFont.SystemFontOfSize(Constants.LargeFontSize),
};
stackView.AddArrangedSubview(questionLabel);
View.ConstrainLayout(() =>
questionLabel.Frame.Width == stackView.Frame.Width
);
// Options
var optionsUIs = new List <Tuple <UIButton, UIButton, Option> >();
var i = 1;
foreach (var option in Screens[Index].Options)
{
var transparentGap = new UIView();
stackView.AddArrangedSubview(transparentGap);
View.ConstrainLayout(() =>
transparentGap.Frame.Height == 5f
);
var optionStackView = new UIStackView
{
Axis = UILayoutConstraintAxis.Horizontal,
Alignment = UIStackViewAlignment.Center,
Distribution = UIStackViewDistribution.EqualSpacing,
Spacing = Constants.SmallGap,
};
stackView.AddArrangedSubview(optionStackView);
var optionRadioButton = new UIButton(UIButtonType.RoundedRect);
optionStackView.AddArrangedSubview(optionRadioButton);
optionRadioButton.SetImage(UIImage.FromBundle("checkmark.png"), UIControlState.Normal);
optionRadioButton.SetImage(UIImage.FromBundle("blank.png"), UIControlState.Disabled);
optionRadioButton.Enabled = false;
View.ConstrainLayout(() =>
optionRadioButton.Frame.Height == 20f &&
optionRadioButton.Frame.Width == 20f
);
var optionTextButton = new UIButton(UIButtonType.System)
{
LineBreakMode = UILineBreakMode.WordWrap,
HorizontalAlignment = UIControlContentHorizontalAlignment.Left,
VerticalAlignment = UIControlContentVerticalAlignment.Center,
Font = UIFont.SystemFontOfSize(Constants.LargeFontSize),
};
optionTextButton.SetTitle(option.Title, UIControlState.Normal);
optionStackView.AddArrangedSubview(optionTextButton);
var maxWidth = View.Frame.Width - Constants.HorizontalPad * 2 - optionRadioButton.Frame.Width;
var textSize = UIHelper.GetTextSize(option.Title, optionTextButton.Font, maxWidth, float.MaxValue);
var textHeight = textSize.Height;
View.ConstrainLayout(() =>
optionTextButton.Frame.Height == textHeight
);
optionsUIs.Add(new Tuple <UIButton, UIButton, Option>(optionRadioButton, optionTextButton, option));
i++;
}
foreach (var tuple in optionsUIs)
{
tuple.Item2.TouchUpInside += (sender, e) =>
{
SelectedOptionId = tuple.Item3.Id;
tuple.Item1.Enabled = true;
foreach (var otherTuple in optionsUIs)
{
if (!Object.ReferenceEquals(sender, otherTuple.Item2))
{
otherTuple.Item1.Enabled = false;
}
}
};
}
}
// Start media automatically
if ((MediaPlayer != null) && (!String.IsNullOrWhiteSpace(mediaPlayerUrl)))
{
MediaPlayer.Play();
}
}
