public void PlayRecord(ChatInfoEvent voice)
 {
     // trigger to download
     DownloadChat(voice.VoiceName, voice.VoiceDate);
     // and try to play
     Debuger.Log("play voice " + voice.VoiceDate + voice.VoiceName);
 }
 private void HandleChat(ChatInfoEvent chat)
 {
     PlayRecord(chat);
 }