Complete (Chapter 1-4)

Apps

Mobile applications created for smartphones.

Open Handset Alliance

The organization that sets the standards for Android mobile devices.

Android 16.0 Baklava

The name of the current version of the Android OS.

open-source

Android is an operating system—no company or individual defines the features or direction of development.

3D graphics

The interface can support 3D graphics for interactive game experiences or 3D image rendering.

Split screen

A multiwindow feature displaying more than one Android app at the same time.

Dark mode

Helps save battery life by reducing power usage from bright white spaces.

Facial recognition

Automatically identifies or verifies a person’s face from an image or video frame.

Front- and rear-facing camera

Android phones can use either camera, enabling video calling and other applications.

Multiple language voice-to-text support

Converts text to speech in multiple languages and reads text messages aloud for visually impaired users.

On-screen keyboard

Offers spelling suggestions, word completion, and supports voice input.

Power management

Identifies background apps using memory and processor resources; closing them extends battery life.

Gaming

Supports gyroscope, gravity and barometric sensors, linear acceleration, and rotation vectors for sensitive game controls.

Voice-based recognition

Recognizes voice actions for calling, texting, and phone navigation.

Wi-Fi Internet tethering

Allows the phone to be used as a wireless or wired hotspot for other devices.

Java

An object-oriented programming language patterned after C++.

Android Studio

An IDE for building Android apps; includes SDK and integrates open-source projects.

XML

Used to assist in the layout of the Android emulator.

Android Emulator

Mimics almost every feature of a real Android handset for app design, development, prototyping, and testing.

treats/desserts

Android has adopted a naming system based on _.

.apk extension

Apps are compiled into package files with this extension.

Google Play

Sells and deploys all apps.

Reliability, Efficiency, and Performance

Minimum standards programs must meet on Google Play.

$25

Developers pay a one-time registration fee to publish apps on Google Play.

Microsoft Phone Link app

Connects an Android phone to Windows 11 PC for texting, notifications, and photo transfer.

Android project view

Contains the key source application folders: manifests, java, and res.

manifests folder

Includes AndroidManifest.xml with all information needed for the app to run.

java folder

Contains the Java code source files.

res folder

Contains app resources: images, music, video, and interface files like activity_main.xml.

Android SDK

Includes layout files (activity_main.xml) in the res/layout folder.

Layout Editor

Contains Palette, Component Tree, toolbar, Design editor, and Attributes pane.

Layout

A container holding as many widgets as needed.

Widget

A single element (object) such as a Button from the Palette.

Attributes pane

Contains attributes and settings of the currently active project or object.

Attribute

A characteristic of an object describing what it can do.

Android Virtual Device (AVD)

An emulator configuration for design and layout purposes in Android Studio.

Component Tree

Displays widgets in the order they were placed on the emulator

Interface

the space where interactions occur between people and the app

XML code

The layout is stored as _.

Special Android-formatted XML code

It is extremely compact

XML

A set of instructions for placing components on the screen

Translations Editor

It can display the original text in the language in which it was programmed, or the language of the current locale plus culturally specific settings

Resources folder

Android provides the strings.xml file or String table inside this folder

strings.xml

A default file that is part of every Android application and contains commonly used strings for an application

string

A series of alphanumeric characters that can include spaces

Localization

The use of the String table to change text based on the user’s preferred language

key

Every string is composed of this

id attribute

It is the name of a component, and a default value, which is the text associated with the component

descriptions

A components that can be read out loud to your user by a speech-based accessibility service such as a screen reader

The Android user interface includes a layout resource designer called the

ConstraintLayout

Organizes how components appear on the app’s screens.

Constraints

the building blocks in an Android layout that attach or align a component to the screen, either by attaching it vertically and horizontally to the edges of the screen or aligning it with another component (or parent) on the screen

Constraint Handles

Four circular dots on the edges of a selected component

top left

a nonconstrained component will always float to the _of the screen when the app is run

white Constraint handle

It means that the component is not aligned

blue Constraint handle

It means that the component is aligned with the screen or another component

Corner boxes

Used to resize the component

text attribute

It uses text from a string resource to display within the component

textSize attribute

It can use various units of measurement

res/drawable folder

Graphics used in ImageView components must first be placed in this folder.

.png, .jpg, and .gif

Android supports these graphic formats

ImageView component

It can display an icon, a company logo, or a graphic on the Android screen

Button components

These are commonly used in GUIs

backgroundTint

An attribute that can be added to a component to set a background color

textColor

An attribute that sets the color of the text in a component

strings.xml

Android loads text resources from the project's _.

ConstraintLayout

Which Android layout provides flexibility in positioning components and facilitates making your layout a Responsive Design UI?

scaled-independent pixels

Which unit of measurement is often preferred for the textSize attribute because it will scale the font to meet the user's size preference?

ImageView component

To display an illustration or photo in an Android app you use a(n) _.

Activity

A screen, constructed from XML files and a Java class

class

It describes a group of objects and serves as a blueprint, or template, for creating those objects

object

It is a specific, concrete instance of a class

instantiate

It define one particular variation of the object within a class

Pascal case

The convention is to use this for Java class names

Android Manifest file

Android Studio automatically adds each activity you create to this file

Method

A set of Java statements that can be included inside a Java class; a piece of code that performs some type of action

Method body

A collection of statements that defines what the method does

void return type

It means it does not return anything

SetContentView

The Java code necessary to display the content of a specific screen.

Event handler

A part of a program coded to respond to a specific event

click event

What does tapping a button is called in Java code

findViewById() method

A method to find a layout XML file

import statement

When you import the Button type as an Android widget, the button package becomes available throughout the app

import statement

It makes more Java functions available to your app

startActivity() method

A method that creates an intent to start another Activity

context and name of Activity

Two parameters when using startActivity() method.

Save All button

A button to save the project

Run app button

A button to test the application in the emulator

AndroidManifest.xml

The file included in each Android application that provides essential information such as the minimum API level to the Android device is called _.

onCreate()

Which Java method initializes an Android Activity?

event handler

A part of a program that responds to a user interaction such as tapping an on-screen button is called a(n) _

OnClickListener()

Which Java method is necessary to detect a user interaction with the app

soft keyboard

The onscreen keyboard is called a _____.

tapping or gestures

Input can come in the form of _____ (using two fingers to pan, rotate, or zoom)

Simplify the user experience

It is the primary design challenge by using legible fonts, simplify input, and optimize each device’s capabilities to maximize user experience.

soft or physical keyboard

Text entered via a _____ is the most common type of mobile input

Text components

It can request different input types (e.g., plain text, phone number, various types of numeric values)

Component type

It can constrain the characters available

User experience

It refers to all aspects of interaction with a device

id attribute

You can use the _____ in the Attributes pane to enter a name that begins with the prefix tv (for TextView)