如何动态更新视图寻呼机项标题

I have a simple messaging application module. In which, there are two swipable tabs. Received and Sent. Let us say I have 20 messages out of which 10 are unread. So what I am doing is showing the tabs as Received - (10). Now when I read the message, it marks the message as read. So I would like to change the title from Received - (10) to Received - (9).I have a simple messaging application module. I