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Android Programming for Beginners

Android Programming for Beginners

By : John Horton, Mayani
4.1 (47)
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Android Programming for Beginners

Android Programming for Beginners

4.1 (47)
By: John Horton, 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 (32 chapters)
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31
Index

How Java and Android work together

Before we start our Android quest, we need to understand how Android and Java work together. Android is a complex system, but you do not need to understand it in depth to be able to make amazing apps.

After we write a program in Java for Android, we click a button and our code is transformed into another form, the form that is understood by Android. This other form is called bytecode and the transformation process is called compiling.

Then, when the user installs our application, the bytecode is translated by another process known as the Android Runtime (ART) into machine code. This is the fastest possible execution format. So, if you have ever heard people saying that you shouldn't use Java because it is slow, then you know they are mistaken. Java is fast for the programmer to program and is then, upon installation, changed to machine code that is fast for the device. What could be better?

Not only does ART enable super-fast execution...

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Android Programming for Beginners
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