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

The imperfections of Note To Self revisited


Actually, as mentioned before, we did not use a strict MVC pattern in that app. If you remember, the ArrayList of notes was actually held in the Activity class. In our next app, we will see how to improve our adherence to the MVC pattern with the use of a specially designed Java class, the singleton. The singleton is not yet another class type such as, inner, anonymous, static, interface, and so on. It is simply a way in which we can design and code a regular class in order to make our code more adherent to the MVC pattern and therefore more manageable as it becomes more complex, more potentially reusable in the future, and more understandable to other developers who might get involved with the project.

So, why did we do it wrong in our Note To Self app? For simplicity. When designing the Note To Self app, we knew that it was never going to be a big or complex project, and it was never going to be worked on simultaneously by more than one developer...