Gah, as you can tell, not an easy thing to answer. You can really figure it out from the custom component template plugin.
You need the following in your setup_globals:
$bp->achievements->format_activity_function = 'dpa_format_activity';
and this function
<br />
function dpa_format_activity( $item_id, $user_id, $action, $secondary_item_id = false, $for_secondary_user = false ) {<br />
global $bp;</p>
<p> switch( $action ) {<br />
case 'new_achievement':<br />
$user_link = bp_core_get_userlink( $user_id );<br />
$achievement_name = apply_filters( 'dpa_filter_achievement_nice_name', dpa_get( 'nice_name', array( array( 'type' => 'd', 'key' => 'id', 'value' => $item_id ) ), 1 ) );</p>
<p> return array(<br />
'primary_link' => $user_link,<br />
'content' => apply_filters( 'dpa_new_achievement_activity', sprintf( __( '%s unlocked achievement: %s', 'dpa-achievement' ), $user_link, $achievement_name ) . __( ' <span class="time-since">%s</span>', 'dpa-achievement' ), $user_id, $item_id )<br />
);<br />
break;<br />
}</p>
<p> do_action( 'dpa_format_activity', $action, $item_id, $user_id, $action, $secondary_item_id, $for_secondary_user );</p>
<p> return false;<br />
}<br />
And to record activity:
<br />
dpa_record_activity(<br />
array(<br />
'item_id' => $achievement_id,<br />
'user_id' => $this->user_id,<br />
'component_name' => $bp->achievements->slug,<br />
'component_action' => 'new_achievement',<br />
'is_private' => 0<br />
)<br />
);<br />
