Book Image

Android Programming for Beginners - Third Edition

By : John Horton
Book Image

Android Programming for Beginners - Third Edition

By: John Horton

Overview of this book

Do you want to make a career in programming but don’t know where to start? Do you have a great idea for an app but don't know how to make it a reality? Or are you worried that you’ll have to learn Java programming to become an Android developer? Look no further! This new and expanded third edition of Android Programming for Beginners will be your guide to creating Android applications from scratch. The book starts by introducing you to all the fundamental concepts of programming in an Android context, from the basics of Java to working with the Android API. You’ll learn with the help of examples that use up-to-date API classes and are created within Android Studio, the official Android development environment that helps supercharge your mobile application development process. After a crash course on the key programming concepts, you’ll explore Android programming and get to grips with creating applications with a professional-standard UI using fragments and storing user data with SQLite. This Android Java book also shows you how you can make your apps multilingual, draw on the screen with a finger, and work with graphics, sound, and animations. By the end of this Android programming book, you'll be ready to start building your own custom applications in Android and Java.
Table of Contents (30 chapters)

Chapter 11: More Object-Oriented Programming

This chapter is the second part of our whirlwind tour (theoretical and practical) into OOP. We have already briefly discussed the concepts of encapsulation, inheritance, and polymorphism, but in this chapter, we will get to see them more in action in some demo apps. While the working examples will show these concepts in their simplest forms, it will still be a significant stepping stone towards taking control of our layouts via our Java code.

In this chapter, we will explore the following:

  • Encapsulation in depth and how it helps us
  • Inheritance in depth and how to take full advantage
  • Polymorphism explained in greater detail
  • Static classes and how we have been using them already
  • Abstract classes and interfaces

First, we will handle encapsulation.