Book Image

Android Programming for Beginners

By : John Horton, Paresh Mayani
Book Image

Android Programming for Beginners

By: John Horton, Paresh Mayani

Overview of this book

Android is the most popular OS in the world. There are millions of devices accessing tens of thousands of applications. It is many people's entry point into the world of technology; it is an operating system for everyone. Despite this, the entry-fee to actually make Android applications is usually a computer science degree, or five years’ worth of Java experience. Android Programming for Beginners will be your companion to create Android applications from scratch—whether you’re looking to start your programming career, make an application for work, be reintroduced to mobile development, or are just looking to program for fun. We will introduce you to all the fundamental concepts of programming in an Android context, from the Java basics to working with the Android API. All examples are created from within Android Studio, the official Android development environment that helps supercharge your application development process. After this crash-course, we’ll dive deeper into Android programming and you’ll learn how to create applications with a professional-standard UI through fragments, make location-aware apps with Google Maps integration, and store your user’s data with SQLite. In addition, you’ll see how to make your apps multilingual, capture images from a device’s camera, and work with graphics, sound, and animations too. By the end of this book, you’ll be ready to start building your own custom applications in Android and Java.
Table of Contents (37 chapters)
Android Programming for Beginners
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Chapter 7. Coding in Java Part 1 – Variables, Decisions, and Loops

In this chapter, we are going to learn and practice the core fundamentals of Java, that is, the code that goes into the classes, and the methods that we create, along with the data that the code acts upon.

We will also quickly recap on what we learned in the previous chapters about Java and then immediately dive into learning how to write our very own Java code. The principles we are about to learn are not limited to Java but are also applicable to other programming languages as well. By the end of the chapter, you will be comfortable writing Java code that actually creates and uses data within Android.

This chapter takes you through:

  • Java syntax and jargon

  • Variables, operators, and expressions

  • Decisions and branching

  • Loops