Often, we need to declare a class property, which should depend on the lifecycle state of Activity or Fragment. In this recipe, we are going to employ both the Kotlin Lazy delegate and the Lifecycle class provided by the Android Architecture Components library (https://developer.android.com/topic/libraries/architecture/). We are going to implement a custom property delegate that will provide values in a lazy manner. This means that they are going to be instantiated only on the first call. Moreover, we are going to clear their values once Activity or Fragment gets destroyed. This will avoid memory leaks, which can be caused by managing properties dependent on the Context instance with the standard Lazy delegate.
Kotlin Standard Library Cookbook
By :
Kotlin Standard Library Cookbook
By:
Overview of this book
For developers who prefer a more simplistic approach to coding, Kotlin has emerged as a valuable solution for effective software development. The Kotlin standard library provides vital tools that make day-to-day Kotlin programming easier. This library features core attributes of the language, such as algorithmic problems, design patterns, data processing, and working with files and data streams.
With a recipe-based approach, this book features coding solutions that you can readily execute. Through the book, you’ll encounter a variety of interesting topics related to data processing, I/O operations, and collections transformation. You’ll get started by exploring the most effective design patterns in Kotlin and understand how coroutines add new features to JavaScript. As you progress, you'll learn how to implement clean, reusable functions and scalable interfaces containing default implementations. Toward the concluding chapters, you’ll discover recipes on functional programming concepts, such as lambdas, monads, functors, and Kotlin scoping functions, which will help you tackle a range of real-life coding problems.
By the end of this book, you'll be equipped with the expertise you need to address a range of challenges that Kotlin developers face by implementing easy-to-follow solutions.
Related Content you might be interested in
Current Title:
Kotlin Standard Library Cookbook
Table of Contents (11 chapters)
Preface
Free Chapter
Ranges, Progressions, and Sequences
Expressive Functions and Adjustable Interfaces
Shaping Code with Kotlin Functional Programming Features
Powerful Data Processing
Tasteful Design Patterns Adopting Kotlin Concepts
Friendly I/O Operations
Making Asynchronous Programming Great Again
Best Practices for the Android, JUnit, and JVM UI Frameworks
Miscellaneous
Other Books You May Enjoy
Customer Reviews