Throughout the book, you use the Android framework classes, and you will be creating Java classes and XML files.
Code examples in this book appear in a monospace font so that they stand out from other text in the book. This means that the code you'll see looks like this:
public class MainActivity
Java is a high-level programming language that is case-sensitive, so be sure to enter the text into the editor exactly as you see it in the book. I also use the standard Java conventions in this book. Therefore, you can transition easily between my examples and the example code provided by the Android Software Development Kit (SDK). All class names, for example, appear in PascalCase format, and all class-scoped variables start with m.