Monitor user data changes

Set a user data change listener to monitor updates to user information, group information, or group member nicknames.

Set a user data change listener

After initialization and before connection, call addUserDataObserver to register a global information change listener.

Java

NCUserInfoManager.getInstance().addUserDataObserver(userDataObserver);

The UserDataObserver interface provides three callback methods:

• onUserUpdate(): Invoked when user information changes.
• onGroupUpdate(): Invoked when group information changes.
• onGroupUserInfoUpdate(): Invoked when a group member's nickname changes.

Interface definition:

Java

    /**
     * User data observer. All callbacks are on the UI thread.
     */
    public interface UserDataObserver {
        /**
         * Callback method when user information changes.
         * @param info The updated user information.
         */
        void onUserUpdate(UserInfo info);

        /**
         * Callback method when group information changes.
         * @param group The updated group information.
         */
        void onGroupUpdate(GroupInfo group);

        /**
         * Callback method when group member user information (nickname) changes.
         * @param groupUserInfo The updated group nickname information.
         */
        void onGroupUserInfoUpdate(GroupUserInfo groupUserInfo);
    }

Remove a user data change listener

Call removeUserDataObserver to unregister a previously set listener.

Java

NCUserInfoManager.getInstance().removeUserDataObserver(userDataObserver);