Android Development with Kotlin

Name: Android Development with Kotlin | Enhance your skills for Android development using Kotlin
Brand: Packt Publishing Limited
Price: 43.99 EUR
Availability: OnlineOnly

Enhance your skills for Android development using Kotlin

Marcin Moskala(Author)

Packt Publishing Limited

1st Edition

Published on 8. July 2025

440 pages

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978-1-78712-898-9 (ISBN)

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Content

Cover
Copyrights
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Customer Feedback
Table of Contents
Preface
Chapter 1: Beginning Your Kotlin Adventure
Say hello to Kotlin
Awesome Kotlin examples
Dealing with Kotlin code
Kotlin Playground
Android Studio
Configuring Kotlin for the project
Using Kotlin in a new Android project
Java to Kotlin converter (J2K)
Alternative ways to run Kotlin code
Kotlin under the hood
The Kotlin standard library
More reasons to use Kotlin
Summary
Chapter 2: Laying a Foundation
Variables
Type inference
Strict null safety
Safe call
Elvis operator
Not-null assertion
The let function
Nullability and Java
Casts
Safe/unsafe cast operator
Smart casts
Type smart casts
Non-nullable smart cast
Primitive data types
Numbers
Char
Arrays
The Boolean type
Composite data types
Strings
String templates
Ranges
Collections
Statements versus expressions
Control flow
The if statement
The when expression
Loops
The for loop
The while loop
Other iterations
Break and continue
Exceptions
The try... catch block
Compile-time constants
Delegates
Summary
Chapter 3: Playing with Functions
Basic function declaration and usage
Parameters
Returning functions
Vararg parameter
Single-expression functions
Tail-recursive functions
Different ways of calling a function
Default argument values
Named arguments syntax
Top-level functions
Top-level functions under the hood
Local functions
Nothing return type
Summary
Chapter 4: Classes and Objects
Classes
Class declaration
Properties
Read-write versus read-only
Property access syntax between Kotlin and Java
Increment and decrement operators
Custom getters/setters
The getter versus property default value
Late-initialized properties
Annotating properties
Inline properties
Constructors
Properties versus constructor parameters
Constructors with default arguments
Patterns
Inheritance
The JvmOverloads annotation
Interfaces
Data classes
The equals and hashCode methods
The toString method
The copy method
Destructing declarations
Operator overloading
Object declaration
Object expression
Companion objects
Companion object instantiation
Enum classes
Infix calls for named methods
Visibility modifiers
The internal modifier and Java bytecode
Sealed classes
Nested classes
Import aliases
Summary
Chapter 5: Functions as First-Class Citizens
Function types
What is function type under the hood?
Anonymous functions
Lambda expressions
The implicit name of a single parameter
Higher-order functions
Providing operations to functions
Observer (Listener) pattern
A callback after a threaded operation
Combination of named arguments and lambda expressions
The last lambda in an argument convention
Named code surrounding
Processing data structures using LINQ style
Java SAM support in Kotlin
Named Kotlin function types
Named parameters in function types
Type alias
Underscore for unused variables
Destructuring in lambda expressions
Inline functions
The noinline modifier
Non-local returns
Labeled returns in lambda expressions
Crossinline modifier
Inline properties
Function references
Summary
Chapter 6: Generics Are Your Friends
Generics
The need for generics
Type parameters versus type arguments
Generic constraints
Nullability
Variance
Variance modifiers
Use-site variance versus declaration-site variance
Collection variance
Variance producer/consumer limitation
Invariant constructor
Type erasure
Reified type parameters
The startActivity method
Star-projections
Type parameter naming convention
Summary
Chapter 7: Extension Functions and Properties
Extension functions
Extension functions under the hood
No method overriding
Access to receiver elements
Extensions are resolved statically
Companion object extensions
Operator overloading using extension functions
Where should top-level extension functions be used?
Extension properties
Where should extension properties be used?
Member extension functions and properties
Types of receivers
Member extension functions and properties under the hood
Generic extension functions
Collection processing
The Kotlin collection type hierarchy
The map, filter, and flatMap functions
The forEach and onEach functions
The withIndex and indexed variants
The sum, count, min, max, and sorted functions
Other stream processing functions
Examples of stream collection processing
Sequence
Function literals with a receiver
Kotlin standard library functions
The let function
Using the apply function for initialization
The also function
The run and with functions
The to function
Domain-specific language
Anko
Summary
Chapter 8: Delegates
Class delegation
The Delegation pattern
Decorator pattern
Property delegation
What are delegated properties?
Predefined delegates
The lazy function
The notNull function
The observable delegate
The vetoable delegate
Property delegation to the Map type
Custom delegates
View binging
Preference binding
Providing a delegate
Summary
Chapter 9: Making Your Marvel Gallery Application
Marvel Gallery
How to use this chapter
Making an empty project
Character gallery
View implementation
Network definition
Business logic implementation
Putting it all together
Character search
Character profile display
Summary
Index

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Android Development with Kotlin

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