Sign In Start Free Trial
Account

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Android Programming for Beginners
  • Toc
  • feedback
Android Programming for Beginners

Android Programming for Beginners

By : John Horton
4.2 (12)
close
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)
close

The structure of Java code – revisited

We have already seen that each time we create a new Android project, we also create a new Java package as a kind of container for the code we write.

We have also learned about and played around with classes. We have imported and taken direct advantage of classes from the Android API such as Log and Toast. We have also used the AppCompatActivity class, but in a different manner to Log and Toast. You might remember the first line of code in all our projects so far, after the import statements, used the extends keyword:

public class MainActivity extends AppCompatActivity {

When we extend a class as opposed to just importing it, we are making it our own. In fact, if you take another look at the line of code, you can see that we are making a new class with a new name, MainActivity. but basing it on the AppCompatActivity class from the Android API.

Important note

The AppCompatActivity class is a slightly modified version of the...

bookmark search playlist download font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected

Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete