Book Image

Kotlin Programming By Example

By : Iyanu Adelekan

Book Image

Kotlin Programming By Example

By: Iyanu Adelekan

Overview of this book

Kotlin greatly reduces the verbosity of source code. With Google having announced their support for Kotlin as a first-class language for writing Android apps, now's the time learn how to create apps from scratch with Kotlin Kotlin Programming By Example takes you through the building blocks of Kotlin, such as functions and classes. You’ll explore various features of Kotlin by building three applications of varying complexity. For a quick start to Android development, we look at building a classic game, Tetris, and elaborate on object-oriented programming in Kotlin. Our next application will be a messenger app, a level up in terms of complexity. Before moving onto the third app, we take a look at data persistent methods, helping us learn about the storage and retrieval of useful applications. Our final app is a place reviewer: a web application that will make use of the Google Maps API and Place Picker. By the end of this book, you will have gained experience of of creating and deploying Android applications using Kotlin.

Preface

Who this book is for

What this book covers

To get the most out of this book

Free Chapter

The Fundamentals

The Fundamentals

Getting started with Kotlin

The fundamentals of the Kotlin programming language

Advantages of Kotlin

Developing Android applications with Kotlin

Fundamentals of the web

Building an Android Application – Tetris

Building an Android Application – Tetris

Android – an overview

Understanding Tetris

Creating the user interface

The app manifest

Implementing Tetris Logic and Functionality

Implementing Tetris Logic and Functionality

Implementing the Tetris gameplay

Introduction to Model-View-Presenter (MVP)

Designing and Implementing the Messenger Backend with Spring Boot 2.0

Designing and Implementing the Messenger Backend with Spring Boot 2.0

Designing the messenger API

Implementing the messenger backend

Deploying the messenger API to AWS

Building the Messenger Android App – Part I

Building the Messenger Android App – Part I

Developing the Messenger app

Building the Messenger Android App – Part II

Building the Messenger Android App – Part II

Creating the Main UI

Creating the Chat UI

Creating the application's settings activity

Android application testing

Performing background operations

Storing Information in a Database

Storing Information in a Database

Working with internal storage

Working with external storage

Network storage

Working with a SQLite database

Working with content providers

Securing and Deploying an Android App

Securing and Deploying an Android App

Securing an Android application

Launching and publishing your Android application

Creating the Place Reviewer Backend with Spring

Creating the Place Reviewer Backend with Spring

The MVC design pattern

Designing and implementing the Place Reviewer backend

Managing Spring application logs with ELK

Implementing the Place Reviewer Frontend

Implementing the Place Reviewer Frontend

Creating views with Thymeleaf

Spring application testing

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Working with a SQLite database

SQLite is a popular relational database management system (RDBMS) that, unlike many RDBMS systems, is not a client-server database engine. Instead, a SQLite database is embedded directly into an application.

Android provides full support for SQLite. SQLite databases are accessible throughout an Android project by classes. Note that in Android, a database is only accessible to the application that created it.

The use of the Room persistence library is the recommended method of working with SQLite in Android. The first step to work with room in Android is the inclusion of its necessary dependencies in a project's build.gradle script:

implementation "android.arch.persistence.room:runtime:1.0.0-alpha9-1"
implementation "android.arch.persistence.room:rxjava2:1.0.0-alpha9-1"
implementation "io.reactivex.rxjava2:rxandroid:2...