This practical introduces the Fragment class and shows you how to include a Fragment as a static part of a UI, as well as how to use Fragment transactions to add, replace, or remove a Fragment dynamically. The user can click OK or Cancel to close the Fragment. The date picker displays a dialog window floating on top of its Activity window when a user taps a button or an action occurs. One example of a dynamic Fragment is the DatePicker object, which is an instance of DialogFragment, a subclass of Fragment. However, the UI of an Activity may be more effective if it adds or removes the Fragment dynamically while the Activity is running. (A Fragment can also be used without a UI, in order to retain values across configuration changes, but this lesson does not cover that usage.)Ī Fragment can be a static part of the UI of an Activity, which means that the Fragment remains on the screen during the entire lifecycle of the Activity. Add a fragment to an activity dynamicallyĪ Fragment is a self-contained component with its own user interface (UI) and lifecycle that can be reused in different parts of an app's UI. Include a fragment for an activity's entire lifecycle

The practical workbook for the Advanced Android Development course is now available as Unit 6: Working with Architecture Componentsġ4.1B: Deleting and updating data with Room

3.2: Working with sensor-based orientationĤ.1A: Using the Profile GPU Rendering toolĤ.1B: Using the Debug GPU Overdraw and Layout Inspector toolsĤ.1C: Using the Systrace and dumpsys toolsĤ.3: Optimizing network, battery, and image useĥ.2: Using the locale to format informationġ0.1A: Creating a custom view from a View subclassġ0.1B: Creating a custom view from scratchġ1.1C: Applying clipping to a Canvas object

Android studio fragment id