That being said, however, a fragment can be thought of as a functional “sub-activity” with its own lifecycle similar to that of a full activity.įragments are stored in the form of XML layout files and may be added to an activity either by placing appropriate elements in the activity’s layout file, or directly through code within the activity’s class implementation.īefore starting to use Fragments in an Android application, it is important to be aware that Fragments were not introduced to Android until version 3.0 of the Android SDK. Fragments can be assembled to create an activity during the application design phase, and added to or removed from an activity during application runtime to create a dynamically changing user interface.įragments may only be used as part of an activity and cannot be instantiated as standalone application elements. The next chapter will work through a tutorial designed to show fragments in action when developing applications in Android Studio, including the implementation of communication between fragments.Ī fragment is a self-contained, modular section of an application’s user interface and corresponding behavior that can be embedded within an activity. This chapter will provide an overview of the basics of fragments in terms of what they are and how they can be created and used within applications. One such area that will be explored in this chapter involves the use of Fragments. Purchase the fully updated Android Studio Dolphin Kotlin Edition of this publication in eBook ($29.99) formatĪndroid Studio Dolphin Essentials - Kotlin Edition eBook (PDF/ePub, Kindle) edition contains 93 chapters and over 820 pagesĪs you progress through the chapters of this book it will become increasingly evident that many of the design concepts behind the Android system were conceived with the goal of promoting reuse of, and interaction between, the different elements that make up an application.
You are reading a sample chapter from the Android Studio 3.0 / Android 8 Edition book.
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