void StopHelper()
{
currentState = MediaStates.End;
if (player != null)
{
player.Stop();
player.Release();
player.Dispose();
}
wifiLock.Release();
wifiLock.Dispose();
am.UnregisterMediaButtonEventReceiver(mediaComponent);
am.Dispose();
mediaComponent.Dispose();
StopForeground(true);
}