Re: aggregate activity stream from public groups
@psycolor: public group activities (e.g. joining a group, creating a group, posting updates) should appear in the standard activity stream. Which activities are not showing for you?
To hide private group activity from the activity stream – follow the instructions I gave for excluding blogs in this thread: https://buddypress.org/community/groups/how-to-and-troubleshooting/forum/topic/need-exclude-parameter-for-bp_has_activities/
Check whether the activity item action is group related, then use the primary id of the item to get the group_id, and then check whether it is one of your private groups.
As per my comment on blogs, you can do this for all activity loops by using the filter, or on a loop by loop basis.
