- 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.
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These components work together to create the functionality of an Android app.
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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:-
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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.
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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.
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Broadcast Receivers:
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Broadcast receivers respond to system-wide events or broadcasts.
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They allow our app to receive and react to events such as incoming SMS messages, battery-low notifications, or network connectivity changes.
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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.
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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.
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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.
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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.
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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.
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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.
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Categories: Android
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