首先，您需要为此设置组件：

function notifier_setup_globals() {
    global $bp, $current_blog;
    $bp->notifier = new stdClass();
    $bp->notifier->id = \'notifier\';
    $bp->notifier->slug = \'notifier\';
    $bp->notifier->notification_callback = \'bp_notifier_format_notifications\';//this is a function which gets notifications
    $bp->active_components[$bp->notifier->id] = $bp->notifier->id;

    do_action( \'notifier_setup_globals\' );
}
add_action( \'bp_setup_globals\', \'notifier_setup_globals\' );

bp_core_add_notification( $item_id, $user_id, $component_name, $component_action, $secondary_item_id = 0, $date_notified = false, $is_new = 1 ) ;

进一步阅读：http://demo.myndconsulting.com/documentation/notification-functions/

每个BuddyPress组件都有一个bp-[groups|friends|...]-notifications.php 文件看看它的功能——它们正在做通知。在BuddyPress插件文件夹中搜索它们的名称，您将找到如何调用它们的位置。