Book Image

Android Programming for Beginners - Second Edition

By : John Horton
Book Image

Android Programming for Beginners - Second Edition

By: John Horton

Overview of this book

Are you trying to start a career in programming, but haven't found the right way in? Do you have a great idea for an app, but don't know how to make it a reality? Or maybe you're just frustrated that in order to learn Android, you must know Java. If so, then this book is for you. This new and expanded second edition of Android Programming for Beginners will be your companion to create Android Pie applications from scratch. We will introduce you to all the fundamental concepts of programming in an Android context, from the basics of Java to working with the Android API. All examples use the up-to-date API classes, and are created from within Android Studio, the official Android development environment that helps supercharge your application development process. After this crash course, we'll dive deeper into Android programming and you'll learn how to create applications with a professional-standard UI through fragments and store your user's data with SQLite. In addition, you'll see how to make your apps multilingual, draw to the screen with a finger, and work with graphics, sound, and animations too. By the end of this book, you'll be ready to start building your own custom applications in Android and Java.
Table of Contents (35 chapters)
Android Programming for Beginners - Second Edition
Contributors
Preface
Other Books You May Enjoy
Index

Examining the log output


In the previous chapter, we mentioned that our app was running in debug mode on the emulator or real device so that we can monitor it and get feedback when things go wrong. So where is all this feedback then?

You might have noticed a whole load of scrolling text at the bottom of the Android Studio window. If not, click on the logcat tab, as shown by the highlighted area labelled as 1 in the following screenshot:

Note

Note that the emulator must be running, or a real device must be attached in debugging mode, for you to see the following window. Furthermore, if you restarted Android Studio for some reason and have not yet executed the app, then the logcat window will be empty. Refer to the first chapter to get the app running on an emulator or a real device:

You can drag the window to make it taller, just like you can in most other Windows applications, if you want to see more.

This window is called the logcat, or sometimes it is referred to as the console. It is our app...