/// <summary>
/// 播放下一首
/// </summary>
public async void SkipNext()
{
//TODO:判断播放模式
//TODO:判断暂停状态
//TODO:判断是播放列表还是电台
PlaybackOperated?.Invoke(null, null);
if (_isPlayingRadio)
{
await radio.PlayNext();
PlayTrackInternal(radio.CurrentPlaying);
}
else
{
var list = PlaylistService.Instance;
if (list.CurrentIndex == list.Count - 1)
{
PlayTrack(0);
}
else
{
PlayTrack(list.CurrentIndex + 1);
}
}
}
/// <returns>是否成功开始播放</returns>
private bool PlayTrackInternal(SongModel song)
{
PlaybackOperated?.Invoke(song, null);
// Start the background task if it wasn't running
//if (!IsBackgroundTaskRunning || MediaPlayerState.Closed == CurrentPlayer.CurrentState)
if (!IsBackgroundTaskRunning)
{
// First update the persisted start track
SettingsService.Playback.Write("TrackId", song.MediaUri.ToString());
SettingsService.Playback.Write("Position", new TimeSpan().ToString());
// Start task
StartBackgroundAudioTask();
return(false);
}
else
{
//TODO: 增加如果播放不成功则刷新地址
if (song.MediaUri == null)
{
ExtensionMethods.InvokeAndWait(async() => song.MediaUri = new Uri(await Net.DataApi.GetDownloadLink(song, false)));
}
MessageService.SendMediaMessageToBackground(MediaMessageTypes.SetSong, song);
MessageService.SendMediaMessageToBackground(MediaMessageTypes.StartPlayback);
return(true);
}
}
/// <summary>
/// 播放虾米内容，自动判断对象类型
/// </summary>
/// <param name="model"></param>
public void PlayModel(object model)
{
PlaybackOperated?.Invoke(model, null);
if (model == null)
{
return;
}
if (model is AlbumModel)
{
PlayAlbum(model as AlbumModel);
}
}
/// <summary>
/// 播放上一首
/// </summary>
public void SkipPrevious()
{
if (_isPlayingRadio)
{
throw new InvalidOperationException("电台不支持上一首功能");
}
PlaybackOperated?.Invoke(null, null);
var list = PlaylistService.Instance;
if (list.CurrentIndex == 0)
{
PlayTrack(list.Count - 1);
}
else
{
PlayTrack(list.CurrentIndex - 1);
}
}