Android How to Program (Paul J Deitel Harvey M Deitel Abbey Deitel) (Z-Library)

# Android How to Program — Reading Guide ## 【One-Line Pitch】 A hands-on, app-driven introduction to Android development that teaches by building twelve complete, working apps — ideal for Java students and self-taught programmers who learn best by doing rather than by reading abstract theory. ## 【Book Arc】 - **Opening (~0%–10%)**: Sets up the book's "App-Driven, Live Code" philosophy, walks through Android history and platform features (including KitKat-era capabilities like NFC, printing, and screen recording), and covers essential setup — installing the IDE, configuring emulators (AVDs) for phones and tablets, and preparing physical devices for testing. - **Early (~10%–23%)**: Introduces Java fundamentals and object-oriented concepts (classes, objects, inheritance, methods, attributes) through Android-specific examples, then moves into the first complete app — the Welcome App — covering the IDE's Package Explorer, editor windows, and Outline view, plus basic GUI creation with XML layouts. - **Early (~23%–32%)**: Builds on the first app with more sophisticated UI work — using LinearLayout and GridLayout to arrange views, working with the Graphical Layout editor, and adding accessibility features like Content Descriptions and TalkBack support. Introduces Android Lint warnings and how to resolve them. - **Middle (~32%–42%)**: Dives into event handling and user interaction through the Tip Calculator app — reading input from EditText, responding to SeekBar changes, performing calculations, and updating TextViews. Covers the Activity lifecycle, particularly onCreate, and the importance of keeping it lightweight to avoid ANR (Application Not Responding) dialogs. - **Middle (~42%–48%)**: Explores the Twitter Searches app, introducing ListView and ListActivity for displaying scrollable data, SharedPreferences for persisting user data, Intents for launching other activities, and AlertDialog for user confirmations. Emphasizes proper dimension resources (16dp margins) and responsive layout design for both portrait and landscape orientations. ## 【Key Takeaways】 - **The "App-Driven, Live Code" method is the book's core pedagogy** (Opening): each chapter centers on one complete, working app — you see what it does, test-drive it, then build it line by line. This keeps motivation high because you're always creating something tangible, not just studying fragments. - **Proper environment setup is non-negotiable** (Early): the book walks through creating Android Virtual Devices (AVDs) for Nexus 4, 7, and 10 with specific configurations, plus USB driver setup for Windows. Emulator testing is slow, so setting up a physical device early saves significant time. - **Java OOP fundamentals are woven into Android examples** (Early): rather than a dry Java primer, concepts like classes, objects, inheritance, and instantiation are taught through the apps you're building — making abstract ideas concrete and immediately applicable. - **Accessibility should be built in from the start** (Early): using Content Descriptions for ImageViews and hints for EditTexts not only eliminates Android Lint warnings but also enables TalkBack to speak the UI for visually impaired users — a practice that's both ethical and practical. - **Layout choice matters for responsive design** (Early): LinearLayout handles proportional horizontal/vertical arrangement, while GridLayout (API 14+) enables complex grid-based layouts. The book shows when to combine them — e.g., nested horizontal LinearLayouts inside GridLayout cells for proportional spacing. - **The Activity lifecycle is performance-critical** (Middle): onCreate should be minimal — if an app takes over five seconds to load, Android shows an ANR dialog allowing users to force-close it. This early warning sets up the threading discussion in later chapters. - **Data persistence and inter-app communication are essential skills** (Middle): SharedPreferences for saving user data, Intents for launching other activities, and AlertDialog for confirmations — these patterns appear in nearly every real Android app and are taught through the Twitter Searches example. ## 【Reading Tips】 - **Skim the "Test-Driving" sections** at the start of each chapter — they show screenshots and describe app behavior. If you're an experienced programmer, you can skip ahead to the "Technologies Overview" and code walkthroughs. - **Deep-read the code walkthroughs** — the "Live Code" approach annotates every significant line. Pay special attention to the anonymous inner classes implementing listeners (OnClickListener, OnItemClickListener), as these are the backbone of Android event handling. - **Don't skip the self-review exercises** at chapter ends — they include fill-in-the-blank questions with answers that reinforce key terminology (e.g., instantiation, attributes, information hiding) and are excellent for exam prep or self-assessment. - **The book targets Android 2.x–4.4 (KitKat) era APIs** — if you're learning modern Android (Jetpack Compose, Material Design 3, Kotlin), treat this as a historical foundation. The Java-based approach and core concepts (Activities, Fragments, layouts, Intents) still transfer, but many APIs have evolved. - **Build the apps yourself rather than just reading** — the book's value is in the doing. Set up your environment first, then follow along chapter by chapter, typing the code and running each app before moving on. ## 【Coverage Limits】 This guide covers the book's opening through the middle sections (approximately the first half), including setup, Java fundamentals, the Welcome App, Tip Calculator, and Twitter Searches apps. Later chapters covering the Flag Quiz, Cannon Game, and more advanced topics (threading, graphics, sensors) are not detailed here — the excerpts do not cover those sections in depth. ##