Android App Components Quiz

An entry point where a user interacts with the app, typically represented by a single screen with a user interface.

A component that runs in the background to perform tasks, such as playing music or sending files, without a direct user interface.

A component that allows the app to respond to system-wide events, such as the battery being low or a picture being taken.

A component that manages a shared pool of app data that can be accessed by other apps.

They are responsible for providing UI for interacting with the user. They represent a single screen on the app and most applications have multiple activities.

They provide an API (Application Programming Interface) to the calling app and allow the app to keep running in the background.

They respond to system-wide broadcasts by performing actions based on those events, and can create notifications to inform the user about those events.

They provide a centralized way to access and manage app data, which can be stored in various types of storage locations.

A secure mechanism in Android to access and share data between apps. It provides a controlled entry point for accessing named data items, identified by a URI scheme.

A unique identifier used to access data within a content provider. They are like addresses, but not directly related to the actual location of the data on the device.

The central file that contains essential information about an Android app. It describes components, permissions, and other metadata required for the system to understand and run the app.

A building block of an Android app that represents a screen or a specific viewable interface. They are responsible for rendering the user interface and responding to user interactions.

Files, data, and UI elements that are independent of the app's code. They provide resources like images, layout designs, text strings, and localization data.

A mechanism in Android that allows apps to request access to sensitive system functionalities or data. Apps need explicit permission from the user to access these resources.

A unique identifier assigned to each resource in an Android application. They streamline the process of referring to resources from the code.

The ability to provide alternative resources to adapt to different device configurations like language, screen size, or orientation. This ensures a consistent and optimal user experience across various devices.

Everything the user can see and interact with in an app, including layout objects, input controls, and visual elements.

A pre-built element used to create a user interface, offering specific functionality (e.g., buttons, text fields, etc.).

An invisible container that organizes UI components, determining their position and layout on the screen.

A visual element that draws something on the screen and allows user interaction.

The arrangement of UI components within a ViewGroup, defining how they are positioned and displayed.

A hierarchical structure that organizes Views and ViewGroups, creating the visual structure of the app.

Defining user interface elements in an external XML file, separating presentation from logic and behavior.

A structured way to define the layout using XML tags, where each tag represents a specific UI element or container.

A root element that serves as the foundation for your layout, usually a ViewGroup, which is then used to organize UI components.

A subclass of ViewGroup that represents a predefined layout structure (e.g., LinearLayout, RelativeLayout, etc.).

A layout that positions child views relative to each other (using IDs) and the parent layout. It offers a more flexible arrangement compared to linear layouts.

Defines how a child view is positioned within a RelativeLayout. It specifies the view's relation to parent layout edges, other views, and layout alignment.

Top edge of this View aligns with the top edge of its parent layout.

The child view is centered vertically within its parent layout.

Top edge of the current view is placed below the top edge of the referenced view.

Left edge of the current view aligns with the right edge of the referenced view.

RelativeLayout can reduce the nesting of ViewGroups, simplifying the view hierarchy and leading to better performance.

RelativeLayout can be used to replace multiple nested LinearLayouts, resulting in a cleaner and more efficient layout structure.

ViewGroup elements in an XML file that define the layout orientations of a View object.

The root element in an XML layout file that contains child elements representing Views and ViewGroups.

A ViewGroup that aligns its children in a single row or column.

The process of converting an XML layout file into a View resource during app compilation.

The method called in an Activity's onCreate() callback to load the layout resource.

The attribute used to assign a unique integer ID to any View object. Can be used for identifying the View for later reference.

A file that contains definitions for all the resources from a layout resource, including the android framework.

The process of creating an instance of a View from a layout resource, typically done in the Activity's onCreate() method.

The unique identifier of a View, assigned using the id attribute, which must be unique throughout the entire View tree.

A layout attribute that specifies the width of a View, defined by absolute distances, wrap_content for content size, or match_parent for the maximum space allowed.

A layout attribute that specifies the height of a View, defined by absolute distances, wrap_content for content size, or match_parent for the maximum space allowed.

A unit of measurement that is density-independent, making it suitable for different screen densities.

The process of defining the size and position of a View within its parent ViewGroup.

An attribute that assigns a weight to a child View in a LinearLayout, allowing it to share available space proportionally.