Book Image

Mastering Android Development with Kotlin

By : Miloš Vasić
Book Image

Mastering Android Development with Kotlin

By: Miloš Vasić

Overview of this book

Kotlin is a programming language intended to be a better Java, and it's designed to be usable and readable across large teams with different levels of knowledge. As a language, it helps developers build amazing Android applications in an easy and effective way. This book begins by giving you a strong grasp of Kotlin's features in the context of Android development and its APIs. Moving on, you'll take steps towards building stunning applications for Android. The book will show you how to set up the environment, and the difficulty level will grow steadily with the applications covered in the upcoming chapters. Later on, the book will introduce you to the Android Studio IDE, which plays an integral role in Android development. We'll use Kotlin's basic programming concepts such as functions, lambdas, properties, object-oriented code, safety aspects, type parameterization, testing, and concurrency, which will guide you through writing Kotlin code in production. We'll also show you how to integrate Kotlin into any existing Android project.
Table of Contents (24 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Debug your application


Now, we know how to log important application messages. During development, we will face situations when only logging messages is not enough when analyzing application behavior or investigating bugs.

For us, it's important to have the ability to debug an application code during its execution on real Android devices or on emulators. So, let's debug something! Open the main Application class and put the break point on line where we log the onCreate() method, as shown here:

As you can see, we set the break point at line 18. We will add more break points. Let's add it in our main (and only) activity. Put a break point in each lifecycle event at lines where we perform logging. 

We set breakpoints at lines 18, 23, 28, 33, 38, and so on. Run the application in debug mode by clicking on the debug icon or by choosing Run | Debug app. The application is started in debug mode. Wait a little bit and a debugger will soon enter the first break point we set.

The following screenshot...