What are the design patterns for creating an Android application that has a basic user interface and utilizes SQL?

edit

Model-View-Controller (MVC) This design pattern separates the application into 3 modules which are the model, view, and controller. The model is responsible for data storage and retrieval, while the view is responsible for the presentation of data, and the controller is responsible for the handling of user input.

Model-View-ViewModel (MVVM) This pattern separates the user interface (View) from the application logic (ViewModel), which is a representation of the data and the application's state. The ViewModel interacts with the model to retrieve and store data.

Singleton This pattern ensures that there only exists one instance of a class throughout the application. This is useful when working with an SQL database where there should only be one instance of a database handler.

Factory Method This pattern allows for the creation of objects without specifying their concrete types. This can be useful when creating different types of SQL statements based on the user's input.

Observer This pattern allows objects to observe a subject for any changes, and be updated accordingly. This can be useful when displaying data that is constantly changing or when the application needs to react to changes in the database.

Adapter This pattern converts one interface to another, allowing two incompatible interfaces to work together. This can be useful when working with different SQL database libraries where one may not be compatible with the application.