Which components or classes in the Android API may violate SOLID principles when designing?

In Android API, some components may violate SOLID principles, especially if used without additional abstraction:

• Activity and Fragment often violate the Single Responsibility Principle, as they contain UI logic, business logic, and data handling.
• AsyncTask (deprecated class) combines background work logic and UI updates, making testing and reuse difficult.
• ContentProvider can be too monolithic if it mixes data access logic and business logic.

To avoid SOLID violations, it is recommended to use architectural patterns (MVP, MVVM), separate responsibilities among classes, and apply interfaces for abstraction.