Migrate an existing AndroidX back implementation Recommended migration path (link on this page) If your app implements custom back behavior, there are different migration pathsĭepending on whether it uses AndroidX and how it handles back navigation.
Update an app that uses custom back navigation If your app uses Fragments or the Navigation Component, also upgrade to Simply opt in to this feature as described Implement any custom back behavior (in other words, it leaves back handling up Updating your app to support this feature is straightforward if your app doesn't Update an app that uses default back navigation Implementing the AndroidX and platform APIs.
You can also view our Google I/O video, which covers additional examples of Predictive back gesture using AndroidX Activity APIs. It provides a common use-case implementation of a WebView handling the
In addition to using this documentation on this page, try out our codelab. KeyEvent.KEYCODE_BACK is no longer supported. Note: KeyEvent.KEYCODE_BACK is not deprecated as there are some supported useĬases of KeyEvent.KEYCODE_BACK however, intercepting back events from In the meantime, we strongly recommend updating your app to ensure you get We plan to make this UI available to users in a future Android release. It does provide an early version of the UI as a developer option for Note: Android 13 doesn't make the predictive back gesture visible to users, but Which involves replacing back interceptions from KeyEvent.KEYCODE_BACKĪnd any classes with onBackPressed methods such as Activity andĭialog with the new system Back APIs. This update provides a migration path to properly intercept back navigation, Most apps will use the backward compatible AndroidX API. (AndroidX) or higher API, or using the new OnBackInvokedCallback OnBackPressedCallback AppCompat 1.6.0-alpha05 Supporting the predictive back gesture requires updating your app, using the Test this back-to-home animation by enabling a developer option The Home screen behind your app, as presented in the mockup in figure 1. Will let users preview the destination or other result of a back gesture beforeįully completing it, allowing them to decide whether to continue or stay inįor example, using a back gesture can display an animated preview of It is part of a multi-year release when fully implemented, this feature Mockup of the predictive back gesture look and feel on a phoneĪndroid 13 (API level 33) introduces a predictive back gesture for Androidĭevices such as phones, large screens, and foldables.
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