How can you build an architecture with multiple modules in a system?

An Android architecture with multiple modules can be built by dividing the project into independent or loosely coupled modules, each responsible for its own functionality. This approach improves scalability, speeds up build times, and simplifies maintenance.

Main approaches:

• Functional modules — each module implements a specific functionality (e.g., authentication, profile, chat).
• Libraries — modules with shared components, utilities, or business logic.
• Features and core modules — the core module contains common resources, and features depend on it.

In Gradle, each module has its own build.gradle, and modules are connected through dependencies.

Example structure:

app/             // main application module
feature_auth/    // authentication module
feature_chat/    // chat module
common/          // shared module with utilities

This approach facilitates teamwork and allows code reuse.