Android Master Topic

  MVVM architecture, ViewModel and LiveData (Part 1) During Google I/O, Google introduced  architecture components  which includes  LiveData  and  ViewModel  which facilitates developing Android app using MVVM pattern. This article discusses how can these components serve an android app that follows MVVM. Quick Definition of MVVM If you are familiar with MVVM, you can skip this section completely. MVVM is one of the architectural patterns which enhances separation of concerns, it allows separating the user interface logic from the business (or the back-end) logic. Its target (with other MVC patterns goal) is to achieve the following principle  “Keeping UI code simple and free of app logic in order to make it easier to manage” . MVVM has mainly the following layers: Model Model represents the data and business logic of the app. One of the recommended implementation strategies of this layer, is to expose its data through observables to be decoupled ...

  Although the Android platform is open and customizable, Android users have become accustomed to constructs developed by Google for Android devices. Although the Android platform is open and customizable, Android users have become accustomed to constructs developed by Google for Android devices. Moreover, the use of these Android concepts is vital in developing an application quickly – custom Android designs can take up to 10 times longer! Android UI Controls Android provides a number of standard UI controls that  enable a rich user experience . Designers and developers should thoroughly understand all of these controls for the following reasons: They are faster to implement. It can take up to ten times longer to develop a custom control than to implement a user interface with standard Android controls. They ensure good performance. Custom controls rarely function as expected in their first implementation. By implementing standard controls, you can eliminate the need to test,...