Mastering Flutter: A Beginner’s Guide

Cover Half Title Series Page Title Page Copyright Page Contents Preface About the Author CHAPTER 1: Getting Started with Flutter and Dart WHAT EXACTLY IS FLUTTER? What Distinguishes Flutter Flutter’s Features Flutter Advantages Flutter’s History Prerequisites Audience Problems INSTALLATION OF FLUTTER Windows System Requirements Install Git Install the Flutter SDK macOS System Requirements Download the Flutter SDK WHAT EXACTLY IS DART PROGRAMMING? Dart: Language Characteristics of Dart Open Source Platform Independent Object-Oriented Concurrency Extensive Libraries Easy to Learn Flexible Compilation Type Safe Objects Browser Support Community Dart’s Libraries Dart: Platforms Native Dart (Machine Code JIT and AOT) Dart Web (JavaScript Dev and Prod) Dart’s Runtime A Fundamental Darts Program Key Actions Variables Default Value INSTALLATION OF DART Install the Dart SDK on Windows Install the Dart SDK on Linux Installation Using apt-get Installation of a Debian Package Installation of the Dark SDK on Mac Editor of Online Dart Support of Dart IED The dart2js Tool First Program in Dart Using Command Line Running on Browser Using IDE Basic Dart Syntax Dart Identifiers String Interpolation and Dart Printing Dart’s Semicolon Line Breaks and Dart Whitespace Block in Dart Command-Line Options for Dart Enable Checked Mode Checked Mode Production Mode COMMENTS IN DART Comments Types Single-Line Comments Multi-Line Comments Documentation Comments KEYWORDS IN DART DATA TYPES IN DART Dart Number Data String Dart Boolean Dart Lists Dart Maps Dart Runes Dart Symbols Dart Dynamic Type VARIABLE IN DART Variable Creation Rule Dart Variable Declaration Type Annotations Declaring the Variable as Having Multiple Values Default Value Final and Const OPERATORS IN DART Operator Types Arithmetic Operators in Dart Unary Operators (Post and Pre) Assignment Operator Relational Operator Type Test Operators Logical Operators Bitwise Operators Conditional Operators (?:) Cascade Notation Operators CHAPTER SUMMARY CHAPTER 2: Data Types and Control Flow Statements DART CONSTANTS Defining/Initializing a Dart Constant Using the Final Keyword, Define Constant Define Constants Using Const Keyword NUMBER IN DART Dart Integer Dart Double Parse() Method in Dart Number Properties Number Methods STRING IN DART Printing String String Concatenation String Interpolation String Properties String Methods Methods and Descriptions LISTS IN DART Lists Types Fixed Length List Growable List List Properties Inserting an Element into a List The Add() Method The AddAll() Method The Insert() Method The InsertAll() Method Updating List replaceRange() Removing List Elements The Remove() Method The RemoveAt() Method The RemoveLast() Method The RemoveRange() Method Dart Iterating List Elements SETS IN DART Initializing Set Add Element into Set Access the Set Element Dart Finding Element in Set Remove Set Element Dart Iterating over a Set Element Dart Remove All Set Element TypeCast Set to List Dart Set Operations Dart Set Properties MAP IN DART Declaring Dart Map Using Map Literals Using Map Constructor Map Properties Map Methods SYMBOL IN DART Dart Convert Symbol to String RUNES IN DART String.codeUnitAt() Method String.codeUnits Property String.runes Property ENUMERATION IN DART Enumeration Initialization CONTROL FLOW STATEMENT IN DART Flow Statement Categories Dart Decision-Making Statements IF STATEMENTS IF-ELSE STATEMENT IF ELSE-IF STATEMENT Nested If-Else Statement SWITCH CASE STATEMENT Benefits of the Switch Case LOOPS IN DART For Loop in Dart Nested for Loop For in Loop While Loop Infinite While Loop Logical Operator While Loop Do-While Loop Selection of the Loop BOOLEAN IN DART CHAPTER SUMMARY CHAPTER 3: Dart Functions and Object-Oriented Programming FUNCTION IN DART Function Benefits Function Defining Calling a Function Passing Arguments to the Function Return a Value from the Function Function Examples Dart Function with an Argument and a Return Value Dart Function with No Parameter and Return Value Dart Function with No Parameter and without a Return Value Dart Function with Parameter and without a Return Value ANONYMOUS FUNCTION IN DART Lexical Scope Lexical Closure THE MAIN() FUNCTION Return Value in Dart Dart Value with Return Value WHAT IS RECURSION? What Is Base Condition in Recursion? Recursive Function in Dart How Does Recursion Work? Recursive Function Qualities OBJECT-ORIENTED CONCEPTS IN DART Class Object Inheritance Polymorphism Interfaces Abstract Class DART CLASSES AND OBJECT Defining a Class in Dart Object in Dart Creating Class Objects in Dart Assessing Instance Variable and Function The Advantages of Objects WHAT EXACTLY IS CONSTRUCTOR? Creating Constructor Types of Constructors Default Constructor or No-Argument Constructor Parameterized Constructor Named Constructors THIS KEYWORD IN DART Local Variables Class Variable Instance Variable The Difference between Class Variable and Instance Variable STATIC KEYWORD IN DART Static Variable in Dart Static Variable Declaring Accessing the Static Variable Static Method Static Methods Declaration Static Method Calling SUPER KEYWORD The Use of a Static Keyword Using a Super Keyword with Variables Using the Super Keyword with the Parent Class Method Using a Super Keyword with the Constructor INHERITANCE IN DART Inheritance Types Single Level Inheritance Multilevel Inheritance Hierarchical Inheritance SUPER CONSTRUCTOR IN DART Implicit Super Explicit Super METHODS IN DART Instance Methods Creating Instance Methods Calling the Instance Method Class Methods Creating Class Methods Calling the Class Method METHOD OVERRIDING IN DART What Exactly Is Polymorphism? Example of Method Overriding Method Overriding Using the Super Keyword The Benefit of Method Overriding Rules of Method Overriding in Dart GETTERS AND SETTERS IN DART Defining a Getter Defining a Setter ABSTRACT CLASSES IN DART Rules for the Abstract Classes Declaring the Abstract Class Abstract Class Usage DART INTERFACES Declaring an Interface Implementing an Interface Implementing Multiple Inheritance Rules for Implementing Interfaces CHAPTER SUMMARY CHAPTER 4: Dart Advanced DART EXCEPTIONS The Try/On/Catch Blocks Finally Block Throwing an Exception Custom Exceptions TYPEDEF IN DART Declaring a Typedef Assigning the Typedef Variable Calling Function with Typedef Complete the Program by Using Typedef Typedef as Parameter Debugging in Dart What Exactly Are Breakpoints? How Do I Create Breakpoints in WebStorm? METADATA IN DART Creating the Metadata Annotation COLLECTION IN DART Collections Iteration HashMap <K, V Class> DART GENERICS Generic Map PACKAGES IN DART Package Manager in Dart Read XML String LIBRARIES IN DART Importing a Library Importing and Using a Library as an Example Library Encapsulation Creating Custom Libraries (User-Defined Library) Step 1: Library Declaration Step 2: Library Connecting Custom Library as an Example Name Alias of Library GENERATORS IN DART Synchronous Generator Asynchronous Generators The Yield Keyword The Sync* Keyword The Async* Keyword DART CALLABLE CLASSES DART ISOLATES Create and Start an Isolate Stop an Isolate Complete Program ASYNC IN DART Difference between Synchronous and Asynchronous Dart Future Dart Async and Await Dart Await Keyword What Exactly Is Concurrency? How Does One Achieve Concurrency? What Is Unit Testing? Unit Testing Task Advantages of Unit Testing Dart Unit Testing Group of Test Cases Grouping Test Cases DART HTML DOM Finding the DOM Elements Event Handling CHAPTER SUMMARY CHAPTER 5: Basics of Flutter FIRST APPLICATION IN FLUTTER FLUTTER ARCHITECTURE Flutter Engine Foundation Library Widgets Specific Widgets Design Gestures State Management Layers FLUTTER WIDGETS WIDGET TYPES Visible Widget Text Button Image Icon Invisible Widget Column Row Center Padding Scaffold Stack State Management Widget StatefulWidget StatelessWidget FLUTTER LAYOUTS Layout a Widget Sorts of Layout Widgets Single Child Widgets Multiple Child Widgets Building the Complex Layout GESTURES IN FLUTTER Pointers Gestures Tap Drag Long Press Pan Pinch Gesture Detector Example of Multiple Gesture STATE MANAGEMENT What Exactly Is a State? Ephemeral State App State FLUTTER IDE Android Studio IntelliJ Idea Visual Studio Code Emacs (Dart Mode) Codemagic FLUTTER SCAFFOLD FLUTTER CONTAINER Why Is a Container Widget Required in Flutter? Container Class Constructors Container Widget Properties FLUTTER ROW AND COLUMN Row Widget Column FLUTTER TEXT Text Widget Constructor Flutter RichText Widget FLUTTER TEXTFIELD BUTTONS IN FLUTTER Flutter Buttons and Their Varieties Flat Button Raised Button Floating Activity Button (FAB) The Drop-Down Button Button Icon Inkwell Button PopupMenu Button Outline Button FLUTTER FORMS Creating a Form Validation of a Form ICONS IN FLUTTER Icon Widget Attributes IMAGES IN FLUTTER How to Display Images in Flutter Display Images from the Internet FLUTTER LISTS Basic Lists Working with Long Lists Creating Grid Lists Creating a Horizontal List FLUTTER TOAST NOTIFICATION FlutterToast.cancel() CHECKBOX IN FLUTTER Checkbox FLUTTER RADIO BUTTON PROGRESS BAR IN FLUTTER LinearProgressIndicator CircularProgressIndicator FLUTTER SLIDER Properties of Slider How Does the Slider Widget Work in Flutter? FLUTTER SWITCH Properties of the Switch Widget CHARTS IN FLUTTER Flutter Supported Chart Types Line Chart Bar Chart Pie or Donut Chart FLUTTER TABLE What Happens When We Utilize the Table Widget? FLUTTER CALENDAR CHAPTER SUMMARY APPRAISAL BIBLIOGRAPHY INDEX