So far, I’ve described how to use fragments to manage multiple screens, to define and present dialogs to the user, and how to use them with a ViewPager container. Fragments are also used in shared preference screens - those lists of options that you can present to let the user to manage the app’s settings. Like dialogs, fragments are important here for how they’re managed by the application framework. By wrapping your preferences interface in a fragment, it can survive orientation and other configuration changes at runtime.
- [Narrator] So far, I've described…how to use fragments to manage multiple screens,…to define and present dialogues to the user,…and how to use them with a view page, or container.…Fragments are also used in shared preference screens,…those lists of options that you can present…to let the user manage the app's settings.…Like with dialogues, fragments are important here…for how they are managed by the application framework.…By wrapping your preferences interface in a fragment,…it can survive orientation, and other…configuration changes at runtime.…
In my beginning application, my main activity class…opens this menu, main menu dot XML.…It has two items, each with and on click event handler,…and those point back to methods in the main activity class,…on settings click, and on test pref click.…When the user clicks the first item,…I will open a settings screen and let the user set a value,…and when they choose the second item,…I will test that preference.…In the resources folder, I've already included a file…in the XML subfolder, named preferences dot XML.…
Author
David Gassner
Released
9/1/2016Looking for study partners?
Join the Associate Android Developer Exam study groupOne of the most common challenges Android developers face is the variation in screen sizes among the thousands of phones, tablets, and other devices that run Android. The Fragments API (introduced in Android 3.0) provides an elegant solution. With fragments, you can build flexible layouts that adapt to any screen size—and do so dynamically, at runtime. In this course, David Gassner shows how to define a layout, add fragments to activities with Java or XML, create alternative layouts for different screen sizes, and use resource folder names to detect and select the right layout. He also shows you how to communicate between activities and fragments with arguments and callback methods, and use fragments to manage dialogs and shared preferences.
- Configuring Android Studio
- Understanding fragments
- Creating a fragment class and layout
- Adding and removing fragments with Java
- Creating layouts for multiple screens
- Understanding arguments and callback methods
- Passing arguments to a fragment
- Choosing layout at runtime
- Displaying dialogs with fragments
- Using fragments for managing dialogs, shared preferences, and more
Skill Level Intermediate
Duration
Views
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Introduction
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Welcome1m 4s
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What you should know1m 50s
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Using the exercise files1m 39s
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1. Getting Started
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Understanding fragments3m 17s
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2. Display Fragments in Activities
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Display a fragment with XML3m 16s
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Add a fragment with Java3m 50s
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3. Manage Fragments at Runtime
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Pass arguments to a fragment5m 18s
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Choose layout at runtime3m 21s
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4. Communication between Fragments and Activities
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5. Display Dialogs with Fragments
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Display a custom dialog5m 1s
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Pass arguments to the dialog4m 16s
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6. Other Uses of Fragments
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Create a ViewPager adapter4m 53s
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Conclusion
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Next steps1m 11s
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Video: Manage shared preferences with fragments