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Android Programming for Beginners

Android Programming for Beginners

By : John Horton
4.2 (12)
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Android Programming for Beginners

Android Programming for Beginners

4.2 (12)
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)
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All the Android UI elements are classes too

When our app is run and the setContentView method is called from the onCreate method, the layout is inflated from the XML and instances of the UI classes are loaded into memory as usable objects. They are stored in a part of the memory called the heap. The heap is managed by the Android Runtime (ART) system.

Re-introducing references

But where are all these UI objects/classes? We certainly can't see them in our code. And how on earth do we get our hands on them?

The ART inside every Android device takes care of memory allocation to our apps. In addition, it stores different types of variables in different places.

Variables that we declare and initialize in methods are stored on the area of memory known as the Stack. We can stick to our existing warehouse analogy when talking about the Stack. We already know how we can manipulate variables on the Stack with straightforward expressions. So, let's talk about the heap...

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