BuddyPress.org

I’m new to Buddypress development and I’m creating a child theme of TwentyTwelve (for learning purpose) that integrates BuddyPress by custom templates.

By default, bp_activity_action() outputs something like this on the activity stream page:

wynonna posted an update in the group Blade Runner 2 days, 23 hours ago

All I want to do is to modify this output. How can I do it? Are there any parameters to this function or bp_get_activity_action()?

Thanks in advance.