The app bar, also known as the action bar, is one of the most important design elements in your app's activities, because it provides a visual structure and interactive elements that are familiar to users. Using the app bar makes your app consistent with other Android apps, letting users quickly understand how to operate your app and have a great experience.
The key functions of the app bar are as follows:
- Dedicated space for giving your app an identity and indicating the user's location in the app.
- Predictable access to important actions, such as search.
- Support for navigation and view switching, using tabs or menus.
This documentation section describes how to use the AndroidX
Toolbar widget as an
app bar. There are other ways to implement an app bar—for example, some themes set up an
ActionBar as an app bar by
default—but using the AppCompat
Toolbar makes it easier to set up an app bar that
works on the widest range of devices. It also gives you room to customize your app bar later in your
- Set up the app bar
Learn how to add a
Toolbarwidget to your activity and set it as the activity's app bar.
- Add and handle actions
- Learn how to add actions to the app bar and its overflow menu, and how to respond when users choose those actions.
- Add an Up action
- Learn how to add an Up button to your app bar so users can navigate back to the app's home screen.
- Use action views and action providers
- Learn how to use these widgets to provide advanced functionality in your app bar.