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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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Manipulating bitmaps

Quite often, however, we need to draw bitmaps in a rotated or otherwise-altered state. It would be quite easy to use Photoshop or whatever your favorite image editing software happens to be to create more bitmaps from the original bitmap to face in other directions. Then, when we come to draw our bitmap, we can simply decide which way to face and draw the appropriate pre-loaded bitmap.

However, I thought it would be much more interesting and instructive if we worked with just one single source image and learned about the class that Android provides to manipulate images in our Java code. You will then be able to add rotating and inverting graphics to your app developer's toolkit.

What is a bitmap exactly?

A bitmap is called a bitmap because that is exactly what it is: a map of bits. While there are many bitmap formats that use different ranges and values to represent colors and transparency, they all amount to the same thing. They are a grid/map of...

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