What Is Android App Module?

Android, Android Apps

What Is Android App Module?

Android app development involves organizing your code into modules. One of the key components in an Android project is the app module.

In this article, we will dive deep into what an Android app module is and how it works.

Understanding Android App Modules

An Android app module is a self-contained unit within an Android project. It contains all the necessary code, resources, and configurations required to build a specific feature or functionality of an application.

Each app module represents a separate section or component of the overall application.

App modules are designed to be modular, independent, and reusable. They allow developers to divide their codebase into smaller units, making it easier to manage and maintain complex applications.

This modular approach also promotes code reusability and helps improve overall development efficiency.

Structure of an Android App Module

An Android app module consists of various components that work together to create a functional part of an application. These components include:

  • Manifest file: Every app module has its own manifest file where you define essential information about the module, such as permissions, activities, services, and broadcast receivers.
  • Java/Kotlin source code: This is where you write the logic and functionality of your app module. It includes classes, interfaces, and other necessary files for implementing specific features.
  • Resources: An app module has its own set of resources, including layouts, drawables, strings, styles, etc., which are used to define the appearance and behavior of the user interface.
  • Dependencies: An app module can depend on other modules or external libraries to access additional functionalities or features. These dependencies are declared in the module’s build configuration file.

Working with Android App Modules

When working with Android app modules, it’s crucial to understand how they interact with each other and the main application module. The main application module acts as a container for all the app modules within a project.

Each app module can have its own set of dependencies, which can be shared or specific to that module. This allows for better separation of concerns and promotes code reusability across different sections of the application.

Creating an Android App Module

To create an app module in Android Studio, follow these steps:

  1. Open your project: Open your Android project in Android Studio.
  2. Right-click on the main application module: In the project explorer, right-click on the main application module and select “New” > “Module”.
  3. Select “Android Library”: In the new module dialog, select “Android Library” and click “Next”.
  4. Configure your app module: Provide a name for your app module, set other configurations such as package name and minimum SDK version, and click “Finish”.
  5. Add code and resources: Once created, you can start adding code files, resources, and dependencies specific to your app module.

The Benefits of Using Android App Modules

Using app modules in your Android projects offers several benefits:

  • Better organization: App modules allow you to organize your codebase into smaller units based on functionality or feature. This makes it easier to navigate through the project and locate specific code.
  • Code reusability: With app modules, you can create reusable components that can be shared across different projects or within the same project.

    This saves development time and effort.

  • Easy maintenance: Modularizing your codebase simplifies maintenance tasks as each module can be worked on independently. It also reduces the risk of introducing bugs or breaking changes in other parts of the application.


In conclusion, an Android app module is a self-contained unit within an Android project that represents a specific feature or functionality. It helps in organizing code, promoting reusability, and simplifying maintenance tasks.

By leveraging app modules effectively, you can build scalable and maintainable Android applications.