The title of this book makes reference to two of the greatest stage names—Spring, ostensibly the best framework of Java, and Android, which has the greatest number of clients of any operating system. This book will help to you learn and develop a product-ready application on your own which will be lightweight, secure, powerful, and responsive. 

Before start learning about the Spring and Android, we will demonstrate examples and code from Kotlin, as this programming language is very new to developers. These days, Kotlin is so popular that Google has declared it the official language of Android. Moreover, the Spring language also supports Kotlin. In this book, we will figure out how to make a robust, secure, and intense server dependent on Spring in the Kotlin language, and use the substance and utilize of this server in an Android application as a client.

In this chapter, you will learn how to set up the environment to create Spring and Android projects, including the required tools and applications. This will include going through steps with accompanying images for visualization purposes. The developers who know Java, at that point, will have some leeway since it is the common platform among Spring and Kotlin. We will demonstrate the code and models with Kotlin that runs on JVM. The Kotlin is designed by JetBrains. On the off-chance that you are new to Kotlin and Spring, being familiar with Java will allow you to write code in Kotlin with ease. 

The following topics will be covered in this chapter:

• Setting up the environment
• Spring
•  Java
•  Kotlin
• Apache Tomcat
• Integrated development environments
• Android