MVVM architecture promotes a clean separation of concerns, making it easier to develop and maintain complex Android applications. By adhering to the key principles and components of MVVM, developers can create scalable, testable, and maintainable apps that provide a seamless user experience.Uncover the journey of evolution from MVC to MVP, tackling challenges through the integration of a Presenter and well-defined contracts. Despite the advantages MVP offers, it necessitates addressing common concerns such as boilerplate code and potential intricacies for more straightforward UIs.Explore the early days of Android with the Model-View-Controller (MVC) pattern. Discover its challenges, like tight connections and testing troubles, through a simple example. While acknowledging its history, the article introduces modern alternatives like Model-View-Presenter (MVP), Model-View-ViewModel (MVVM), and Redux, explaining why they're better choices for today's Android app setup.The Command pattern wraps the request into a specific object that has all the information necessary to perform its task. You can think of it as the next stage of refactoring, where at first we extract the code to a separate method, and then to a separate object, taking the arguments needed to execute the request in the constructor.The Mediator's job is to organize communication between close classes. The `Mediator` pattern cuts out dependencies between components. It takes over the interaction between them, becoming the main communication hub for a group of classes. There is a reverse of the controls because components are now just telling 'what happened' instead of telling others to 'do something'. It can be found e.g. in the form of `ViewModel` in Android, where it separates UI interactions from data model changes.
