What is MVP:- MVP(Model View Presenter) is the best software design patterns for Android. MVP separates the application into three layers:
Model: This holds the actual business logic of the application. which will allow us to perform and manage any business layer logic and data access, such as retrieving data from our Web service, Access to the database, etc.
View: The View is a application interface that displays UI for particular activity when we execute application. When we take actions first it sends the data to presenter.
Presenter: The presenter acts as a bridge between the view and model class. It calls during creation of any events from view controller or interaction with the interface to perform action.
What is difference between MVC and MVP
In MVP, View doesn't have any interaction to access model.
In MVC,We put almost logic to handling data processing and notification
The Presenter is tied to a single View.
The View is completely passive in the MVP pattern.
Views can communicate directly with Model
Advantage of using MVP
It's very understandable and easier code maintenance because it separated application's model, view and presenter in layers
Application components doesn't have conceptual relationship.
In this Architecture as you can see that view ( activity, fragment) take any actions like button events, call api then view navigate to presenters class where place business logic. As Presenter class get events from view then it call Model class. Model do execution and back to Presenter class. Presenter class back do update View Class.
Note: Please download complete demo from below attached file.
In this demo, We created single Model and Presenter class to whole application. I did not tried to have separated Model and Presenter class for each View as you have seen ever.
For any questions, please feel free to write in comments.