BackgroundMediaPlayer.Current.SetUriSource(new Uri("ms-appx:///djlang59_-_Drops_of_H2O_(_The_Filtered_Water_Treatment_).mp3"));
BackgroundMediaPlayer.Current.Play();

BackgroundMediaPlayer.Current.CurrentStateChanged += MediaPlayerStateChanged;private async void MediaPlayerStateChanged(MediaPlayer sender, object args
{await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>{switch( BackgroundMediaPlayer.Current.CurrentState ){case MediaPlayerState.Stopped:AppBarBtnPause.IsEnabled = false;AppBarBtnStop.IsEnabled = false;break;case MediaPlayerState.Playing:AppBarBtnPause.IsEnabled = true;AppBarBtnStop.IsEnabled = true;BackgroundMediaPlayer.SendMessageToBackground(new ValueSet{{"Title", "Drops of H2O"},{"Artist", "J.Lang"},});break;case MediaPlayerState.Paused:AppBarBtnPause.IsEnabled = false;break;}});
}

BackgroundMediaPlayer.MessageReceivedFromForeground += BackgroundMediaPlayerOnMessageReceivedFromForeground;private void BackgroundMediaPlayerOnMessageReceivedFromForeground(object sender, MediaPlayerDataReceivedEventArgs e)
{systemmediatransportcontrol.DisplayUpdater.Type = MediaPlaybackType.Music;systemmediatransportcontrol.DisplayUpdater.MusicProperties.Title = e.Data["Title"].ToString();systemmediatransportcontrol.DisplayUpdater.MusicProperties.Artist = e.Data["Artist"].ToString();systemmediatransportcontrol.DisplayUpdater.Update();
}

public void Run(IBackgroundTaskInstance taskInstance)
{systemmediatransportcontrol = SystemMediaTransportControls.GetForCurrentView();systemmediatransportcontrol.ButtonPressed += SystemControlsButtonPressed;systemmediatransportcontrol.IsEnabled = true;systemmediatransportcontrol.IsPauseEnabled = true;systemmediatransportcontrol.IsStopEnabled = true;systemmediatransportcontrol.IsPlayEnabled = true;BackgroundMediaPlayer.Current.CurrentStateChanged -= BackgroundMediaPlayerCurrentStateChanged;BackgroundMediaPlayer.MessageReceivedFromForeground -= BackgroundMediaPlayerOnMessageReceivedFromForeground;BackgroundMediaPlayer.Current.CurrentStateChanged += BackgroundMediaPlayerCurrentStateChanged;BackgroundMediaPlayer.MessageReceivedFromForeground += BackgroundMediaPlayerOnMessageReceivedFromForeground;deferral = taskInstance.GetDeferral();
}

private void BackgroundMediaPlayerCurrentStateChanged(MediaPlayer sender, object args)
{if (sender.CurrentState == MediaPlayerState.Playing){systemmediatransportcontrol.PlaybackStatus = MediaPlaybackStatus.Playing;}else if (sender.CurrentState == MediaPlayerState.Paused){systemmediatransportcontrol.PlaybackStatus = MediaPlaybackStatus.Paused;}
}private static void SystemControlsButtonPressed(SystemMediaTransportControls sender, SystemMediaTransportControlsButtonPressedEventArgs args)
{switch (args.Button){case SystemMediaTransportControlsButton.Play:BackgroundMediaPlayer.Current.Play();break;case SystemMediaTransportControlsButton.Pause:BackgroundMediaPlayer.Current.Pause();break;case SystemMediaTransportControlsButton.Stop:BackgroundMediaPlayer.Current.Pause();BackgroundMediaPlayer.Current.Position = TimeSpan.FromSeconds(0);break;}
}