• A typical Android app is composed of various components that work together to provide a complete app construction.
  • Each component has a specific role and interacts with other components to create the required functionality of the app.
  • These components work together to create the functionality of an Android app.
  • It is necessary to understand how these components interact and how to use them effectively is essential for building well-structured and functional Android applications.
  • The major components of an Android app are:-
    • Activities:
      • An Activity simply represents a single screen with a user interface.
      • It is the most common and main component of an Android app and is responsible for handling user interactions and displaying UI elements.
      • An even small app has at least one Activity class. 
      • An activity is said to be the entry point for interacting with the user.
      • Without this component, we can’t think about the creation of Android apps.
    • Services:
      • Services are background tasks/processes that perform tasks without a user interface.
      • They can run independently of the app’s user interface and are often used for tasks such as playing music, handling network operations, or processing data.
    • Broadcast Receivers:
      • Broadcast receivers respond to system-wide events or broadcasts.
      • They allow our app to receive and react to events such as incoming SMS messages, battery-low notifications, or network connectivity changes.
    • Content Providers:
      • Content providers manage shared data, allowing different apps to access and share data with one another.
      • They provide a structured way to access, store, and retrieve data in a consistent manner.
    • Intents:
      • Intents are a messaging mechanism that allows components to request actions from other components.
      • They are used for starting activities, services, and broadcast receivers, and can carry data between components.
    • Fragments:
      • Fragments represent a portion of an activity’s user interface.
      • They are often used in tablet layouts and to create more flexible and modular UI designs for different screen sizes.
    • Layouts and UI Widgets:
      • Layouts define the structure of the user interface, and UI widgets are the interactive elements within the layout.
      • Examples of UI widgets include buttons, text fields, images, and more.
    • Resources:
      • Resources include XML files, images, strings, and other assets used by the app.
      • They are stored separately from the app’s code and allow for easier customization and localization.
    • Manifest File:
      • The AndroidManifest.xml file contains information about the app’s components, permissions, and other essential details.
      • It’s a critical configuration file that describes the app to the Android system.
Categories: Android


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