public void Dispose()
{
if (backgroundAudioTaskStarted != null)
{
backgroundAudioTaskStarted.Dispose();
backgroundAudioTaskStarted = null;
}
if (IsAudioPlayerTaskRunning)
{
RemoveMediaPlayerEventHandlers();
ApplicationSettingsHelper.SaveSettingToLocalSettings(ApplicationSettingsConstants.BackgroundTaskState, BackgroundTaskState.Running.ToString());
}
}
private void ResetAfterLostBackground()
{
BackgroundMediaPlayer.Shutdown();
_isAudioPlayerTaskRunning = false;
backgroundAudioTaskStarted.Reset();
ApplicationSettingsHelper.SaveSettingToLocalSettings(ApplicationSettingsConstants.BackgroundTaskState, BackgroundTaskState.Unknown.ToString());
try
{
BackgroundMediaPlayer.MessageReceivedFromBackground += BackgroundMediaPlayer_MessageReceivedFromBackground;
}
catch (Exception ex)
{
if (ex.HResult == RPC_S_SERVER_UNAVAILABLE)
{
throw new Exception("Failed to get a MediaPlayer instance.");
}
else
{
throw;
}
}
}
/// <summary>
/// 应用状态恢复
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void App_Resuming(object sender, object e)
{
ApplicationSettingsHelper.SaveSettingToLocalSettings(ApplicationSettingsConstants.AppState, AppState.Active.ToString());
}
