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)

Animation demo app – introducing SeekBar

That's enough theory, especially with something that should be visual. Let's build an animation demo app that explores everything we have just discussed and a bit more.

This app involves small amounts of code in lots of different files. Therefore, I have tried to make it plain which code is in which file, so you can keep track of what is going on. This will make the Java we write for this app more understandable as well.

The app will demonstrate rotations, fades, translations, animation events, interpolations, and controlling duration with a SeekBar widget. The best way to explain what the SeekBar widget does is to build it and then watch it in action.

Laying out the animation demo

Create a new project called Animation Demo using the Empty Activity template, leaving all the other settings at their defaults. As usual, should you wish to speed things up by copy and pasting the layout, the Java code, or the animation...