Name: Kotlin Programming By Example
Author: Iyanu Adelekan
ISBN: 9781788479783

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Kotlin Programming By Example

Iyanu Adelekan

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Title Page
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Copyright and Credits
Kotlin Programming By Example
Dedication
Packt Upsell
Why subscribe?
PacktPub.com
Contributors
About the author
About the reviewer
Packt is searching for authors like you
Preface
Who this book is for
What this book covers
To get the most out of this book
Download the example code files
Download the color images
Conventions used
Get in touch
Reviews
The Fundamentals
Getting started with Kotlin
JDK installation
Installation on Windows
Installation on macOS
Installation on Linux
Compiling Kotlin programs
Working with the command-line compiler
Installing the command-line compiler on macOS
Homebrew
MacPorts
Installing the command-line compiler on Linux
SDKMAN!
Installing the command-line compiler on Windows
Running your first Kotlin program
Writing scripts with Kotlin
Using the REPL
Working with an IDE
Installing IntelliJ IDEA
Setting up a Kotlin project with IntelliJ
The fundamentals of the Kotlin programming language
Kotlin basics
Variables
Variable scope
Local variables
Operands and operators
Types
Int
Float
Double
Boolean
String
Char
Array
Functions
Declaring functions
Invoking functions
Return values
The function naming convention
Comments
Single-line comments
Multiline comments
Doc comments
Controlling program flow
Conditional expressions
The if expression
The when expression
The Elvis operator
Loops
The for loops
The while loops
The break and continue keywords
The do…while loops
Packages
The import keyword
Object-oriented programming concepts
Introduction
Working with classes
Creating objects
Companion objects
Properties
Advantages of Kotlin
Developing Android applications with Kotlin
Setting up Android Studio
Building your first Android application
Creating a user interface
Running the application
Fundamentals of the web
What is the web?
Hypertext Transfer Protocol
Clients and servers
HTTP requests and responses
HTTP methods
Summary
Building an Android Application – Tetris
Android – an overview
Application components
Activities
Intents
Intent filters
Fragments
Services
Loaders
Content providers
Understanding Tetris
Creating the user interface
Implementing the layouts
ConstraintLayout
Margins
Chains
Dimension constraints
Defining dimension resources
Views
View groups
Defining string resources
Handling input events
Event listeners
Working with SharedPreferences
Implementing the game activity layout
The app manifest
Structure of the app manifest file
<action>
<activity>
<application>
<category>
<intent-filter>
<manifest>
Summary
Implementing Tetris Logic and Functionality
Implementing the Tetris gameplay
Modeling a tetromino
Characteristics of a block
Behaviors of a block
Modeling block shape
Private access modifier (private)
Public access modifier (public)
Protected access modifier (protected)
Internal visibility modifier (internal)
Creating the application model
Creating TetrisView
Implementing ViewHandler
Implementing Dimension
Implementing TetrisView
Finishing up GameActivity
Introduction to Model-View-Presenter (MVP)
What is MVP?
Model
View
Presenter
Varying implementations of MVP
Summary
Designing and Implementing the Messenger Backend with Spring Boot 2.0
Designing the messenger API
Application programming interfaces
REST
Designing the messenger API system
Incremental development
Spring Boot
What the messenger system does
Use cases
System behavior
Identifying data
Implementing the messenger backend
PostgreSQL
Installing PostgreSQL
Windows installation
macOS installation
Linux installation
Creating a new Spring Boot application
Getting familiar with Spring Boot
Maven
Creating models
Creating repositories
Services and service implementations
Restricting API access
Spring Security
JSON Web Tokens
Configuring web security
Accessing server resources via RESTful endpoints
Deploying the messenger API to AWS
Setting up PostgreSQL on AWS
Deploying the messenger API to Amazon Elastic Beanstalk
Summary
Building the Messenger Android App – Part I
Developing the Messenger app
Including project dependencies
Developing the Login UI
Creating the login view
Creating the Messenger API service and data repositories
Storing data locally with SharedPreferences
Creating value objects
Retrieving remote data
Communicating with a remote server
Communicating with servers using OkHttp
Sending requests to a server with OkHttp
Modeling request data
Creating the Messenger API service
Implementing data repositories
Creating the login interactor
Creating the login presenter
Finishing the LoginView
Developing the signup UI
Creating the signup interactor
Creating the signup presenter
Creating the signup view
Summary
Building the Messenger Android App – Part II
Creating the Main UI
Creating the MainView
Creating the MainInteractor
Creating the MainPresenter
Wrapping up the MainView
Creating the MainActivity menu
Creating the Chat UI
Creating the chat layout
Preparing chat UI models
Creating the ChatInteractor and ChatPresenter
Creating the application s settings activity
Android application testing
Performing background operations
AsyncTask
IntentService
Summary
Storing Information in a Database
Working with internal storage
Writing files to internal storage
Reading files from internal storage
A sample application using internal storage
Saving cached files
Working with external storage
Getting external storage permission
Asserting media availability
Storing sharable files
Caching files with external storage
Network storage
Working with a SQLite database
Working with content providers
Summary
Securing and Deploying an Android App
Securing an Android application
Data storage
Using internal storage
Using external storage
Using content providers
Networking security considerations
IP networking
Telephony networking
Input validation
Working with user credentials
Code obfuscation
Securing broadcast receivers
Dynamically loading code
Securing services
Launching and publishing your Android application
Understanding the Android developer program policies
Preparing your Android developer account
Localization planning
Planning for simultaneous release
Testing against the quality guidelines
Building a release-ready application package (APK)
Planning your application s Play Store listing
Uploading your application package to the alpha or beta channel
Device compatibility definition
Pre-launch report assessment
Pricing and application distribution setup
Distribution option selection
In-app products and subscriptions setup
Determining your application s content rating
Publishing your application
Signing your application for release
Releasing your Android app
Summary
Creating the Place Reviewer Backend with Spring
The MVC design pattern
The model
The view
The controller
Designing and implementing the Place Reviewer backend
Use case identification
Identifying data
Setting up the database
Implementing the backend
Connecting the backend to Postgres
Creating models
Creating data repositories
Place Reviewer business logic implementation
Securing the Place Reviewer backend
Serving web content with Spring MVC
Managing Spring application logs with ELK
Generating logs with Spring
Installing Elasticsearch
Installing Kibana
Installing Logstash
Configuring Kibana
Summary
Implementing the Place Reviewer Frontend
Creating views with Thymeleaf
Implementing the user registration view
Implementing the login view
Setting up the Place Reviewer app with the Google Places API web service
Getting an API key
Including Google Places API in your web application
Implementing the home view
Implementing the review creation web page
Spring application testing
Adding necessary testing dependencies to the project
Creating a configuration class
Configuring a test class to use custom configuration
Writing your first test
Summary
What next?
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Kotlin Programming By Example