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Creating Dynamic UIs with Android Fragments
Creating Dynamic UIs with Android Fragments

Creating Dynamic UIs with Android Fragments: Creating Dynamic UIs with Android Fragments Second Edition , Second Edition

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Creating Dynamic UIs with Android Fragments

Chapter 2. Fragments and UI Flexibility

This chapter builds on the concepts introduced in the previous chapter to provide solutions to addressing specific differences in device layouts. The chapter explains the use of adaptive activity layout definitions to create apps that automatically rearrange their user interface in response to the differences in device form factors. With adaptive activity layout definitions, applications are able to support a wide variety of devices using just a few properly designed fragments.

In this chapter, we will cover the following topics:

  • Simplifying the challenge of supporting device differences
  • Dynamic resource selection
  • Coordinating fragment content
  • The role of FragmentManager
  • Supporting fragments across activities

By the end of this chapter, we will be able to implement a user interface that uses fragments to automatically adapt to differences in device layouts and coordinates user actions across the involved fragments.

Creating UI flexibility

Utilizing fragments in our user interface design provides a good foundation for creating applications that more easily adapt to device differences, but we must go a little further to create truly flexible UIs. We must design our application such that the fragments that make up the UI are easily rearranged in response to the characteristics of the device on which the app is currently running.

To achieve this, we must follow appropriate techniques to dynamically change the layout of individual fragments in response to the current device's characteristics. Once we employ these techniques, we must be sure that we implement our fragments in such a way that each fragment can function effectively, independent of layout changes that might affect the behavior or even existence of other fragments within the activity.

Dynamic fragment layout selection

As we mentioned in the previous section, creating a flexible UI requires that the layout and positioning of fragments within...

Fragments protect against the unexpected

The true test of user interface flexibility lies in how well the user interface design and implementation holds up when encountering an unexpected change request. A well-designed fragment-based user interface allows us to create incredibly dynamic user interfaces that can evolve and change with minimal impact on the code. As an example, let's make what could potentially be a major design change to our application.

Currently, the application always shows the book list and description on the same activity. The only difference is whether the fragments are positioned vertically or horizontally relative to one another. Imagine we receive feedback from our users that they don't like the way the app appears when viewed on a portrait-oriented handset with the list positioned above the description. When viewed on a portrait-oriented handset, they would like the list and description to appear on separate activities. In all other cases, they want the...

Summary

Fragments provide our applications with a level of user interface flexibility that would be difficult to achieve otherwise. By properly designing our application to use fragments and associating the fragment resources with the appropriate device characteristics, we're able to build apps that contain a rich user interface that automatically adapts to the wide variety of Android device form factors that exist. We get all of these capabilities while writing only minimal code.

In the next chapter, we will dig into the life cycle of fragments and explore how we can leverage the fragment life cycle to create more responsive user interfaces and how we can leverage specialized Fragment classes.

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Key benefits

  • *From an eminent author comes a book that will help you create engaging apps that dynamically adapt to individual device characteristics
  • *The only book that includes the latest fragment-oriented features and their role in Material design
  • *This book provides code-intensive discussions and detailed examples that help you understand better and learn faster.

Description

Today’s users expect mobile apps to be dynamic and highly interactive, with rich navigation features. These same apps must look fantastic whether running on a medium-resolution smartphone or high-resolution tablet. Fragments provide the toolset we need to meet these user expectations by enabling us to build our applications out of adaptable components that take advantage of the rich capabilities of each individual device and automatically adapt to their differences. This book looks at the impact fragments have on Android UI design and their role in both simplifying many common UI challenges and in providing best practices for incorporating rich UI behaviors. We look closely at the roll of fragment transactions and how to work with the Android back stack. Leveraging this understanding, we explore several specialized fragment-related classes such as ListFragment and DialogFragment. We then go on to discuss how to implement rich navigation features such as swipe-based screen browsing, and the role of fragments when developing applications that take advantage of the latest aspects of Material Design. You will learn everything you need to provide dynamic, multi-screen UIs within a single activity, and the rich UI features demanded by today’s mobile users.

Who is this book for?

This book is for developers with a basic understanding of Android programming who would like to improve the appearance and usability of their applications by creating a more interactive user experience and dynamically adaptive UIs; providing better support for tablets and smartphones in a single app; and reducing the complexity of managing app UIs.

What you will learn

  • *Learn the role and capabilities of fragments
  • *Use Android Studio s fragment-oriented features
  • *Create an app UI that works effectively on smartphones and tablets
  • *Manage the creation and life cycle of fragments
  • *Dynamically manage fragments using the FragmentTransaction class
  • * Learn the application design for communicating between fragments
  • *Leverage fragments when implementing applications that take advantage of the latest features of Material Design
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Publication date, Length, Edition, Language, ISBN-13
Publication date : Mar 23, 2016
Length: 154 pages
Edition : 2nd
Language : English
ISBN-13 : 9781785889592
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Product Details

Publication date : Mar 23, 2016
Length: 154 pages
Edition : 2nd
Language : English
ISBN-13 : 9781785889592
Category :
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Frequently bought together


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Total $ 120.97
Android Application Development Cookbook
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Creating Dynamic UIs with Android Fragments
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Learning Material Design
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Total $ 120.97 Stars icon

Table of Contents

7 Chapters
1. Fragments and UI Modularization Chevron down icon Chevron up icon
2. Fragments and UI Flexibility Chevron down icon Chevron up icon
3. Fragment Life Cycle and Specialization Chevron down icon Chevron up icon
4. Working with Fragment Transactions Chevron down icon Chevron up icon
5. Creating Rich Navigation Chevron down icon Chevron up icon
6. Fragments and Material Design Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

Rating distribution
Full star icon Full star icon Full star icon Half star icon Empty star icon 3.6
(5 Ratings)
5 star 20%
4 star 40%
3 star 20%
2 star 20%
1 star 0%
Hugo May 15, 2016
Full star icon Full star icon Full star icon Full star icon Full star icon 5
This book is good because it teaches how and why to use Fragments, if you are beginner you will start to think more structured on the usability and appearance of your applications, you will start to work on better layouts and navigation, but if you are an Android developer with a big experience this book will help you develop more updated applications, Android has great API's but if you don't take advantage of this, your apps will not achieve that result you expect, fragments add a new world of possibilities, and this book is able to teach this for you, fragments are one topic that I have ignored in my first project app early days in beginning of Android development, when you don't use the correct tools, your project don't achieve what you expect, working in a team, this will help you think on the solutions more easily, the book cover more than I expect like integration of the fragments on an app using material design, this is awesome, the result is beautiful. I would recommend this book for you that want to make great android apps.
Amazon Verified review Amazon
majid Apr 29, 2017
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Very nice book
Amazon Verified review Amazon
Daryl Ducharme Jan 27, 2017
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
I got dumped into the deep end on Android development. My first professional Android project was a monolithic beast of an app that takes full advantage of fragments. However, following what was going on and figuring out best practices was hard to do from such a large code base. This book got me up to speed quickly and easily.
Amazon Verified review Amazon
Marc M. May 11, 2016
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
I ran into an issue, maybe a third of the way through the book, that didn't let me continue. I've contacted the publisher and am waiting.Sadly, the code is not available for this edition of the book, and all projects are dependent on what you did before, so I can't get past this issue while I wait.That said, before the problem: it's well written, concise, and does a heck of a job. Will amend my review if and when it's fixed.
Amazon Verified review Amazon
rodgersd Jul 27, 2016
Full star icon Full star icon Empty star icon Empty star icon Empty star icon 2
If you are just beginning with Fragments this is a good solid overview, and you would probably feel good if you paid a couple bucks for it. For an advanced user this might help clarify one or two things, it did for me. But it is of no more help than that. Paying over $20 you are going to feel like you got ripped off.
Amazon Verified review Amazon
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