Add or remove a user event handler

To receive information about events related to users connected to the Sendbird server, add a user event handler with its unique user-defined ID by calling SendbirdChat.addUserEventHandler().

If you want to stay informed of changes related to users and notify users' client apps of these changes, define and register multiple user event handlers to each Activity instance.

The onTotalUnreadMessageCountChanged() attribute is turned off by default. Contact us if you wish to use this feature.

The following code shows a full set of supported event callbacks with their parameters and how to add a user event handler to the unique SendbirdChat instance.

SendbirdChat.addUserEventHandler(
    UNIQUE_HANDLER_ID,
    object : UserEventHandler() {
        override fun onTotalUnreadMessageCountChanged(totalCount: Int, totalCountByCustomType: Map<String, Int>) {}
    }
)

The following code shows how to remove the user event handler.

SendbirdChat.removeUserEventHandler(UNIQUE_HANDLER_ID);