The Model—View—Controller(MVC) Pattern

The Model—View—Controller(MVC) Pattern

The MVC pattern suggests splitting the code into 3 components. While creating the class/file of the application, the developer must categorize it into one of the following three layers:...

The Model—View—Presenter(MVP) Pattern

MVP pattern overcomes the challenges of MVC and provides an easy way to structure the project codes. The reason why MVP is widely accepted is that it provides modularity, testability, and a more clean and maintainable codebase. It is composed of the following three components:...

The Model — View — ViewModel (MVVM) Pattern

MVVM pattern has some similarities with the MVP(Model — View — Presenter) design pattern as the Presenter role is played by the ViewModel. However, the drawbacks of the MVP pattern has been solved by MVVM. It suggests separating the data presentation logic(Views or UI) from the core business logic part of the application. The separate code layers of MVVM are:...

Difference Between MVC, MVP, and MVVM Design Pattern

MVC(MODEL VIEW CONTROLLER) MVP(MODEL VIEW PRESENTER) MVVM(MODEL VIEW VIEWMODEL) One of the oldest software architecture Developed as the second iteration of software architecture which is advance from MVC. Industry-recognized architecture pattern for applications. UI(View) and data-access mechanism(Model) are tightly coupled. It resolves the problem of having a dependent View by using Presenter as a communication channel between Model and View.  This architecture pattern is more event-driven as it uses data binding and thus makes easy separation of core business logic from the View. Controller and View exist with the one-to-many relationship. One Controller can select a different View based upon required operation. The one-to-one relationship exists between Presenter and View as one Presenter class manages one View at a time. Multiple View can be mapped with a single ViewModel and thus, the one-to-many relationship exists between View and ViewModel. The View has no knowledge about the Controller. The View has references to the Presenter. The View has references to the ViewModel Difficult to make changes and modify the app features as the code layers are tightly coupled. Code layers are loosely coupled and thus it is easy to carry out modifications/changes in the application code. Easy to make changes in the application. However, if data binding logic is too complex, it will be a little harder to debug the application. User Inputs are handled by the Controller. The View is the entry point to the Application The View takes the input from the user and acts as the entry point of the application. Ideal for small scale projects only. Ideal for simple and complex applications. Not ideal for small scale projects. Limited support to Unit testing. Easy to carry out Unit testing but a tight bond of View and Presenter can make it slightly difficult. Unit testability is highest in this architecture. This architecture has a high dependency on Android APIs.  It has a low dependency on the Android APIs.  Has low or no dependency on the Android APIs. It does not follow the modular and single responsibility principle. Follows modular and single responsibility principle. Follows modular and single responsibility principle....