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.