addChatRoomChangeListener method Null safety

void addChatRoomChangeListener(
  1. EMChatRoomEventListener listener
)

Registers a chat room event listener. After registering the chat room event listener, you can listen for events in {@link EMChatRoomEventListener}, for example, users joining and exiting the chat room, adding the specified member to the chat group mute list, updating the chat room allow list, and destroying the chat room.

To stop listening for chat room events, call {@link #removeChatRoomListener(EMChatRoomEventListener)}.

Param listener A chat room listener. See {@link EMChatRoomEventListener}.

Implementation

void addChatRoomChangeListener(EMChatRoomEventListener listener) {
  _chatRoomEventListeners.add(listener);
}