Why is it important to separate the business process logic and the user interface display in mobile applications?

Separation of business logic and user interface presentation in mobile applications is important for improving quality and development convenience. It allows:

• Easier support and testing, as business logic can be tested separately from the UI.
• Increased code reuse, for example, business logic can be used across different interfaces.
• Simplified team work by dividing responsibilities between UI and logic developers.

In Android, architectural patterns such as MVVM (Model-View-ViewModel) are often used, where the View is responsible for display, and the ViewModel handles business logic and data preparation.

Example: The ViewModel retrieves data from a repository and provides it to the UI via LiveData, while the UI simply observes changes and updates the display.