private void SaveLists(object sender, SuspendingEventArgs e)
{
var deferral = e.SuspendingOperation.GetDeferral();
if (IsMyBackgroundTaskRunning)
{
// Stop handling player events immediately
RemoveMediaPlayerEventHandlers();
// Tell the background task the foreground is suspended
MessageService.SendMessageToBackground(new AppStateChangedMessage(AppState.Suspended));
}
// Persist that the foreground app is suspended
ApplicationSettingsHelper.SaveSettingsValue(ApplicationSettingsConstants.AppState, AppState.Suspended.ToString());
ShuffleList shuffleList = new ShuffleList(Albums.albumList.ToList());
shuffleList.SaveShuffleList(shuffleList.GenerateNewList(ShuffleList.FAV_LIST_CAPACITY));
ShuffleList.SaveFavouriteList(shuffleList.GenerateFavouriteList());
deferral.Complete();
}
private async void WaitingBar_Loaded(object sender, RoutedEventArgs e)
{
if (IsInitialed)
{
var str = ApplicationSettingsHelper.ReadResetSettingsValue("NewCreated");
if (str == null)
{
HideBar(WaitingBar);
str = ApplicationSettingsHelper.ReadResetSettingsValue("NewAdded");
if (str != null)
{
MessageService.SendMessageToBackground(new RefreshFilesMessage());
Albums.notifyrefresh += Albums_notifyrefresh;
await Albums.Refresh();
SetOtherPages();
if (Albums.albumList.Count > 0)
{
MessageService.SendMessageToBackground(new UpdateFilesMessage(Albums.albumList.ToSongModelList()));
}
}
str = ApplicationSettingsHelper.ReadResetSettingsValue("NewDeleted");
if (str != null)
{
Albums.RestoreAlbums();
}
return;
}
}
RefreshState v = RefreshState.Normal;
v = Albums.RestoreAlbums();
Albums.CopytoAlbumList();
Albums.progresschanged += Albums_progresschanged;
switch (v)
{
case RefreshState.NeedCreate: await Albums.FirstCreate(); break;
case RefreshState.NeedRefresh: await Albums.Refresh(); break;
case RefreshState.Normal: break;
}
HideBar(WaitingBar);
((Window.Current.Content as Frame).Content as MainPage).FinishCreate();
IsInitialed = true;
foreach (var task in BackgroundTaskRegistration.AllTasks)
{
if (task.Value.Name == nameof(BackgroundAudio))
{
isMyBackgroundTaskRunning = true;
break;
}
}
StartBackgroundAudioTask();
Application.Current.Suspending += SaveLists;
TimeSpan period = TimeSpan.FromSeconds(5);
#pragma warning disable CS4014 // 由于此调用不会等待，因此在调用完成前将继续执行当前方法
SetOtherPages();
#pragma warning restore CS4014 // 由于此调用不会等待，因此在调用完成前将继续执行当前方法
PeriodicTimer = ThreadPoolTimer.CreateTimer((source) =>
{
if (!IsShuffleListInitialed)
{
ShuffleList shuffleList = new ShuffleList(Albums.albumList.ToList());
var list = shuffleList.GenerateNewList(ShuffleList.FAV_LIST_CAPACITY);
list = ShuffleList.ShuffleIt(list);
#pragma warning disable CS4014 // 由于此调用不会等待，因此在调用完成前将继续执行当前方法
Dispatcher.RunAsync(CoreDispatcherPriority.High,
async () =>
{
ShuffleListResources.Source = list;
await ShowShuffleArtwork(list);
HideBar(FavWaitingBar);
});
#pragma warning restore CS4014 // 由于此调用不会等待，因此在调用完成前将继续执行当前方法
}
}, period);
}