How was modularity achieved in the system implementation from a technical perspective?

Modularity in Android systems is usually achieved by dividing the application into independent modules or components, each responsible for its part of the functionality. Technically, this is implemented through:

• Using Gradle modules, where each module is compiled separately and has its dependencies.
• Applying architectural patterns (e.g., MVVM, MVP) that separate logic, presentation, and data.
• Using interfaces and abstractions for loose coupling between components.
• Dependency injection (e.g., using Dagger or Hilt), which allows easy replacement of implementations and testing of modules separately.

Example of a Gradle module structure:

app/          // main application module
network/      // network handling module
feature_login/ // login functionality module
feature_profile/ // user profile module

Each module has its own build.gradle and can be included in the main application as a dependency.