Android Application Development Cookbook - Second Edition

Adding and removing Fragments during runtime

Defining a Fragment in the layout, as we did in the previous recipe, is known as a static Fragment and cannot be changed during runtime. Rather than using the <fragment> element, we will create a container to hold the Fragment, then create the Fragment dynamically in the Activity's onCreate() method.

The FragmentManager provides the APIs for adding, removing, and changing Fragments during runtime using a FragmentTransaction. A Fragment transaction consists of:

• Starting a transaction
• Performing one or multiple actions
• Committing the transaction

This recipe will demonstrate the FragmentManager by adding and removing Fragments during runtime.

Getting ready

Create a new project in Android Studio and call it: ...