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: RuntimeFragments. Use the default Phone & Tablet options and select the Empty Activity option when prompted for the Activity Type.

How to do it...

To demonstrate adding and removing Fragments, we first need to create the Fragments, which we will...