Fragments

3 hours.

Android runs on variety of devices, from phones with small screen sizes, to tablets and large-screen TV sets. Fragments in a nutshell represent a smaller part of a user interface that could take a whole screen, or be part of a larger UI. By creating and using fragments, your app can adapt to variety of devices and screen sizes. In this module, you will get a solid overview of fragments and will learn how to design them, develop them, and use them both statically and dynamically. Topics covered include:

• What is a fragment: an overview and motivation
• The compatibility package: targeting pre-Honeycomb devices
• Fragment lifecycle
• Creating a fragment class
• Creating a fragment layout
• Statically including fragments in an activity
• Dynamically attaching fragments
• Handling run-time configuration changes
• Retaining Fragments Across Activity Re-Creation
• Using Fragments with no Layouts
• Finding Fragments
• Fragment Operations
• Performing Fragment Transactions
• Managing the Fragment Back Stack
• Integrating Fragment Action Bar/Options Menu Items
• Integrating Fragment Action Bar/Options Menu Items (example)
• Communication Between the Fragment and the Activity
• Best Practices: Loose Coupling of Activities and Fragments
• Best Practices: Define Fragment Interfaces to Invoke Activity Behavior
• Best Practices: The Activity as a Switchboard
• Advanced Fragment Initialization
• Implementing Dialogs Using Fragments
• Using a Fragment-Based Dialog
• Fragment-Based Preference Management
• Additional Fragment Subclasses