Search icon Close icon
Search icon CANCEL
Subscription
0
Cart icon
Cart
Close icon
You have no products in your basket yet
Save more on your purchases!
Savings automatically calculated. No voucher code required
Arrow left icon
All Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Newsletters
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Android Programming with Kotlin for Beginners

You're reading from  Android Programming with Kotlin for Beginners

Product type Book
Published in Apr 2019
Publisher Packt
ISBN-13 9781789615401
Pages 698 pages
Edition 1st Edition
Languages
Concepts
Author (1):
John Horton John Horton
Profile icon John Horton
LinkedIn
John Horton is a programming and gaming enthusiast based in the UK. He has a passion for writing apps, games, books, and blog articles. He is the founder of Game Code School.
Read more
See other products by John Horton
Toc

Table of Contents (33) Chapters close

Android Programming with Kotlin for Beginners
Contributors
Preface
1. Getting Started with Android and Kotlin 2. Kotlin, XML, and the UI Designer 3. Exploring Android Studio and the Project Structure 4. Getting Started with Layouts and Material Design 5. Beautiful Layouts with CardView and ScrollView 6. The Android Lifecycle 7. Kotlin Variables, Operators, and Expressions 8. Kotlin Decisions and Loops 9. Kotlin Functions 10. Object-Oriented Programming 11. Inheritance in Kotlin 12. Connecting Our Kotlin to the UI and Nullability 13. Bringing Android Widgets to Life 14. Android Dialog Windows 15. Handling Data and Generating Random Numbers 16. Adapters and Recyclers 17. Data Persistence and Sharing 18. Localization 19. Animations and Interpolations 20. Drawing Graphics 21. Threads and Starting the Live Drawing App 22. Particle Systems and Handling Screen Touches 23. Android Sound Effects and the Spinner Widget 24. Design Patterns, Multiple Layouts, and Fragments 25. Advanced UI with Paging and Swiping 26. Advanced UI with Navigation Drawer and Fragment 27. Android Databases 28. A Quick Chat Before You Go Other Book You May Enjoy Index

Chapter 12. Connecting Our Kotlin to the UI and Nullability

By the end of this chapter, the missing link between our Kotlin code and our XML layouts will be fully revealed, leaving us with the power to add all kinds of widgets and UI features to our layouts as we have done before, but this time we will be able to control them through our code.

In this chapter, we will take control of some simple UI elements, such as Button and TextView, and, in the next chapter, we will take things further and manipulate a whole range of UI elements.

To enable us to understand what is happening, we need to find out a bit more about the memory in an app, and two areas of it in particular – the Stack and the Heap.

In this chapter, we will cover the following topics:

  • Android UI elements are classes

  • Garbage collection

  • Our UI is on the Heap

  • More polymorphism

  • Nullability – val and var revisited

  • Casting to different types

Prepare to make your UI come to life.

lock icon The rest of the chapter is locked
arrow left Previous Section
Section 1 of 6
Next Section arrow right
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Sign up now
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Start free trial
Renews at $15.99/month. Cancel anytime}

Authors (1)

Left arrow icon
Profile icon John Horton
LinkedIn
John Horton is a programming and gaming enthusiast based in the UK. He has a passion for writing apps, games, books, and blog articles. He is the founder of Game Code School.
Read more
See other products by John Horton
Right arrow icon

Other recommended products

Related to this chapter
Left arrow icon
Android Programming for Beginners
Android Programming for Beginners
Read more
Learn Java, Android, and app development concepts easily with this updated third edition of Android Programming for Beginners. Whether you want to become a professional Android developer or just want to have fun learning Java and Android, this Android Java programming book is what you need.
Read more
Apr 2021 24 hours 44 minutes
Learning Java by Building Android Games
Learning Java by Building Android Games
Read more
Android, one of the most popular mobile operating systems, uses Java as one of the primary languages for building apps of all types. This new, improved, and updated third edition is unlike other Android books; it doesn’t assume any Java programming experience and shows you how to build Android games from scratch using five exciting game projects.
Read more
Mar 2021 22 hours 52 minutes
Learning Java by Building Android Games
Learning Java by Building Android Games
Read more
Android is one of the most popular mobile Operating systems presently. It uses the Java programming language. The problem is that most Android books assume the reader is already proficient with Java. This new and expanded second edition of Learning Java by Building Android Games shows you how to start building Android games from scratch. The difficulty level will grow steadily as you explore key Java topics, such as variables, loops, methods, object oriented programming, and design patterns, including code and examples that are written for Java 9 and Android P.
Read more
Aug 2018 25 hours 48 minutes
Mastering Android Development with Kotlin
Mastering Android Development with Kotlin
Read more
Kotlin is a programming language intended to be a better Java, and it is designed to be usable and readable across large teams with different levels of knowledge. Kotlin gives more to Android than Java ever did. With this book, you will learn how to create effective and modern applications using a cutting edge programming language. We’ll teach you Android from novice to master level, and guide you to become an experienced Android developer
Read more
Nov 2017 12 hours 36 minutes
Android 9 Development Cookbook
Android 9 Development Cookbook
Read more
In this Cookbook, proven, modular recipes take you from the absolute basics to advanced location-based services, security techniques, and performance optimization. You'll learn how to write apps from scratch, ensure interoperability, choose the best solutions for common problems, and avoid development pitfalls.
Read more
Oct 2018 15 hours 28 minutes
Beginning C++ Game Programming
Beginning C++ Game Programming
Read more
This book is a fun introduction to the world of game programming, C++, and the OpenGL-powered SFML using five fun, fully playable games of increasing difficulty and advancing features
Read more
Oct 2019 24 hours 52 minutes
Hands-On Android UI Development
Hands-On Android UI Development
Read more
A great user interface (UI) can spell the difference between success and failure for any new application. This book will show you not just how to code great UIs, but how to design them as well. It will take novice Android developers on a journey, showing them how to leverage the Android platform to produce stunning Android applications.
Read more
Nov 2017 11 hours 36 minutes
How to Build Android Apps with Kotlin
How to Build Android Apps with Kotlin
Read more
This book will equip?you to create high-quality, visually appealing Android 11 apps from scratch with Kotlin. You’ll discover a wide range of real-world development challenges faced by developers and explore various techniques to overcome them.
Read more
Feb 2021 26 hours 28 minutes
Right arrow icon

Personalised recommendations for you

Based on your interests and search pattern
Left arrow icon
Elevate SwiftUI Skills by Building Projects
Elevate SwiftUI Skills by Building Projects
Read more
Elevate SwiftUI skills by building projects is a project-based guide for Swift programmers to create interactive and fun projects by making the most of SwiftUI. Throughout the book, you’ll build four engaging projects, exploring the impressive cross-platform UI framework and building apps for Apple Watch, iPhone, iPad, and macOS.
Read more
Sep 2023 8 hours 56 minutes
The Immersive Metaverse Playbook for Business Leaders
The Immersive Metaverse Playbook for Business Leaders
Read more
This book explains what the metaverse is and why it is of utmost value to business decision-makers. The chapters help you get a solid understanding of the concepts and roles that augmented reality and virtual reality play, along with providing information on metaverse technologies, as well as thought-provoking consumer and enterprise use cases.
Read more
Nov 2023 15 hours 16 minutes
Right arrow icon