/// <summary>
/// The Run method is the entry point of a background task.
/// </summary>
/// <param name="taskInstance"></param>
public void Run(IBackgroundTaskInstance taskInstance)
{
_appSettingsHelper = new AppSettingsHelper();
Debug.WriteLine("Background Audio Task " + taskInstance.Task.Name + " starting...");
// InitializeAsync SMTC object to talk with UVC.
//Note that, this is intended to run after app is paused and
//hence all the logic must be written to run in background process
_systemmediatransportcontrol = BackgroundMediaPlayer.Current.SystemMediaTransportControls;
_systemmediatransportcontrol.ButtonPressed += systemmediatransportcontrol_ButtonPressed;
// _systemmediatransportcontrol.PropertyChanged += systemmediatransportcontrol_PropertyChanged;
_systemmediatransportcontrol.IsEnabled = true;
_systemmediatransportcontrol.IsPauseEnabled = true;
_systemmediatransportcontrol.IsPlayEnabled = true;
_systemmediatransportcontrol.IsNextEnabled = true;
_systemmediatransportcontrol.IsPreviousEnabled = true;
//InitializeAsync message channel
BackgroundMediaPlayer.MessageReceivedFromForeground += BackgroundMediaPlayer_MessageReceivedFromForeground;
BackgroundMediaPlayer.Current.CurrentStateChanged += Current_CurrentStateChanged;
//Send information to foreground that background task has been started if app is active
if (ForegroundAppState == ForegroundAppStatus.Active)
{
var message = new ValueSet {
{ PlayerConstants.BackgroundTaskStarted, "" }
};
BackgroundMediaPlayer.SendMessageToForeground(message);
}
_appSettingsHelper.Write(PlayerConstants.BackgroundTaskState, PlayerConstants.BackgroundTaskRunning);
// This must be retrieved prior to subscribing to events below which use it
_deferral = taskInstance.GetDeferral();
// Mark the background task as started to unblock SMTC Play operation (see related WaitOne on this signal)
TaskStarted.Set();
taskInstance.Task.Completed += Taskcompleted;
taskInstance.Canceled += OnCanceled;
//Add handlers for MediaPlayer
//Add handlers for playlist trackchanged
QueueManager.TrackChanged += playList_TrackChanged;
QueueManager.ErrorHandler += QueueManager_ErrorHandler;
_backgroundtaskrunning = true;
}
