What Conventions Are Used in This Book

This book presents several types of sidebars for special kinds of information:

► Did You Know? messages provide useful information or hints related to the current text.

► By the Way messages provide additional information that might be interesting or relevant.

► Watch Out! messages provide hints or tips about pitfalls that may be encountered and how to avoid them.

This book uses the following code-related conventions:

► Code and programming terms are set in a monospace font.

► ^ is used to signify that the code that follows should appear on the same line as the preceding code.

► Exception handling and error checking are often removed from printed code samples for clarity and to keep the book a reasonable length.

This book uses the following conventions for step-by-step instructions and explanations:

► The core application developed in this book is developed iteratively. Generally, this means that the first time a new concept is explained, every item related to the new concept is discussed in detail. As we move on to more advanced topics in later lessons,

What Conventions Are Used in This Book?

we assume that you have mastered some of the more rudimentary aspects of Android development from previous chapters, and we do not repeat ourselves much. In some cases, we instruct you to implement something in an early lesson and then help you improve it in a later chapter.

We assume that you'll read the chapters of this book in order. As you progress through the book, you'll note that we do not spell out each and every step that must be taken for each and every feature you implement to follow along in building the core application example. For example, if three buttons must be implemented on a screen, we walk you step-by-step through the implementation of the first button but leave the implementation of the other two buttons as an exercise for you. In a later chapter on a different topic, we might simply ask you to implement some buttons on another screen.

Where we tell you to navigate through menu options, we separate options using commas. For example, if we told you to open a new document, we'd say "Select File, New Document."

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