本文首先利用顶级活动关系图对应用程序高层活动进行描述，这样可使读者对应用程序活动建立概括性了解，然后，以图文结合的方式详细讲解应用程序提供的功能。-In this paper, the first to use top-level activity diagram of the application to describe high-level activities, so that readers of the application to establish a general understanding of the activities, and then to graphic detail on the combination of the functions of applications.