Source Reference:

• Component: BuddyPress :: bp-xprofile

  File: /bp-xprofile/bp-xprofile-activity.php :: Trac Source Line: 122

   * @global object $bp Global BuddyPress settings object
   * @uses bp_activity_add() Adds an entry to the activity component tables for a specific activity
   */
  function bp_xprofile_new_avatar_activity() {
  	global $bp;
  
  	if ( !bp_is_active( 'activity' ) )
  		return false;
  
  	$user_id = apply_filters( 'bp_xprofile_new_avatar_user_id', $bp->displayed_user->id );
  
  	$userlink = bp_core_get_userlink( $user_id );
  
  	bp_activity_add( array(
  		'user_id' => $user_id,
  		'action' => apply_filters( 'bp_xprofile_new_avatar_action', sprintf( __( '%s changed their profile picture', 'buddypress' ), $userlink ), $user_id ),
  		'component' => 'profile',
  		'type' => 'new_avatar'
  	) );
  }