example of adding activity to a BuddyPress group

<?php
/*
 * This is an example of adding activity to a BuddyPress group.
 *
 * I cribbed it pretty much wholesale from EGB
 * @link https://github.com/lordmatt/external-group-blogs/
 *
 * You will almost certainly need to do some work and testing
 * to get something useful from this code.
 *
 */
 
 
// Get the group ID somehow - for example:
$group_id = bp_get_current_group_id();

$hide_sitewide = true;

// get the activity date somehow, for a very poor example:
$post_date = date("l jS \of F Y h:i:s A");

$link = 'http://example.com';

$aid = groups_record_activity( array(
   'id' => null,
   'user_id' => false,
   'action' => 'My Activity Action',
   'content' => 'My Activity Content',
   'primary_link' => $link,
   'type' => 'my_type',
   'item_id' => $group_id,
   'recorded_time' => gmdate( "Y-m-d H:i:s", $post_date ),
   'hide_sitewide' => $hide_sitewide
) );

// add meta data to activity
bp_activity_update_meta( $aid, 'my_key', 'My Value' );

// update the last activity value for the group
groups_update_groupmeta( $group_id, 'last_activity', bp_core_current_time() );