What key methodologies and principles are used for software architecture development?

The following key methodologies and principles are often used for developing software architecture:

• Single Responsibility Principle (SRP) — each module or class should have one reason to change.
• Separation of Concerns — dividing the system into parts, each responsible for a specific aspect.
• Dependency Inversion Principle — high-level modules should not depend on low-level modules directly.
• Modularity and low coupling — components should be as independent as possible.
• Use of design patterns — such as MVC, MVP, MVVM, which help structure code and separate logic.
• SOLID principles — a set of rules to improve code quality and flexibility.

In Android development, architectural patterns like MVVM or MVP are often used, along with architectural components (ViewModel, LiveData) to manage state and separate UI from business logic.