ChatterFeedFromApex

chatterSample

      public pageReference feedWithMention(){
        ConnectApi.FeedItemInput feedItemInput = new ConnectApi.FeedItemInput();
        ConnectApi.MentionSegmentInput mentionSegmentInput = new ConnectApi.MentionSegmentInput();
        ConnectApi.MessageBodyInput messageBodyInput = new ConnectApi.MessageBodyInput();
        ConnectApi.TextSegmentInput textSegmentInput = new ConnectApi.TextSegmentInput();

        messageBodyInput.messageSegments = new List<ConnectApi.MessageSegmentInput>();
        // メンション先のユーザを指定
        User u = [SELECT Id FROM User WHERE Name = 'testUser' LIMIT 1];
        mentionSegmentInput.id = u.Id;
        messageBodyInput.messageSegments.add(mentionSegmentInput);

        // chatterフィードに選択した値を格納
        textSegmentInput.text = '\r\n' + selected + 'を選択しました。';
        messageBodyInput.messageSegments.add(textSegmentInput);

        feedItemInput.body = messageBodyInput;
        feedItemInput.feedElementType = ConnectApi.FeedElementType.FeedItem;

        // フィード先に取引先責任者を関連付ける
        feedItemInput.subjectId = cont.Id;

        ConnectApi.FeedElement feedElement = ConnectApi.ChatterFeeds.postFeedElement(Network.getNetworkId(), feedItemInput);

        // 元の取引先責任者詳細ページに戻す
        PageReference pageRef = new PageReference('/' + cont.Id);
        return pageRef;
    }