registerListener method Null safety
- ListenerValue func
Set an event listener, through which users can get various status notifications from TRTCCloud
For more information, please see the definitions in TRTCCloudListenerEnum
in the trtc_cloud_listener
file
Implementation
void registerListener(ListenerValue func) {
if (listener == null) {
listener = TRTCCloudListenerObj(_channel);
}
listener!.addListener(func);
}