如何获取以下事件？
您可以对大多数函数使用onConnectionStateChanged((回调。您可以在此处阅读有关这些功能的信息：https://docs.agora.io/en/Video/API%20Reference/java/classio_1_1agora_1_1rtc_1_1_i_rtc_channel_event_handler.html#a6dfbfe241ac004b792a499c29033ddff
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