The Exploration and Practice of MVVM Pattern on Android Platform

摘要

How UI designers and business engineers collaborate to development apps on Android platform conveniently and effectively is a difficult problem to tackle when projects get more complicate and need more effort. This paper compared the commonality and variability of MVVM with the commonly used MVC and MVP patterns. An RSS subscription app was designed and implemented by using Data Binding and Rome.jar techniques and the use of MVVM pattern on Android platform was explored. Three key points to solve the problem of bidirectional binding of views and view models were described. Decoupling of Model and View further separated data, logic and view and satisfied the requirements of different format of views for the same model. Therefore, duplicated code was reduced. The more important is that the coupling level of code was decreased for multiple developers. The software design objective of "high cohesion and low cupping" was achieved and efficiently collaborative development was accomplished.