Changements de comportement: applications ciblant Android 16 ou version ultérieure

Comme les versions précédentes, Android 16 apporte des modifications de comportement pouvant affecter votre application. Les modifications de comportement suivantes s'appliquent exclusivement aux applications qui ciblent Android 16 ou version ultérieure. Si votre application cible Android 16 ou une version ultérieure, vous devez la modifier pour qu'elle prenne en charge ces comportements, le cas échéant.

Veillez également à consulter la liste des modifications de comportement qui affectent toutes les applications exécutées sur Android 16, quelle que soit la targetSdkVersion de votre application.

Expérience utilisateur et interface utilisateur du système

Android 16 inclut les modifications suivantes, qui visent à créer une expérience utilisateur plus cohérente et intuitive.

Fin de la possibilité de désactiver l'affichage bord à bord

Android 15 enforced edge-to-edge for apps targeting Android 15 (API level 35), but your app could opt-out by setting R.attr#windowOptOutEdgeToEdgeEnforcement to true. For apps targeting Android 16, R.attr#windowOptOutEdgeToEdgeEnforcement is deprecated and disabled, and your app can't opt-out of going edge-to-edge.

For testing in Android 16 Beta 2, ensure your app supports edge-to-edge and remove any use of R.attr#windowOptOutEdgeToEdgeEnforcement. To support edge-to-edge, see the Compose and Views guidance. Let us know about concerns in our issue tracker on the feedback page.

Migration ou désactivation requise pour la prévisualisation du Retour

对于以 Android 16 或更高版本为目标平台且在 Android 16 或更高版本的设备上运行的应用，预测性返回系统动画（返回主屏幕、跨任务和跨 activity）默认处于启用状态。此外，系统不会调用 onBackPressed，也不会再调度 KeyEvent.KEYCODE_BACK。

如果您的应用拦截了返回事件，并且您尚未迁移到预测性返回，请更新应用以使用受支持的返回导航 API；或者，在应用的 AndroidManifest.xml 文件的 <application> 或 <activity> 标记中将 android:enableOnBackInvokedCallback 属性设置为 false，以暂时停用此功能。

“返回主页”预测性返回动画。
预测性跨 activity 动画。
预测性跨任务动画。

API de polices élégantes obsolètes et désactivées

以 Android 15（API 级别 35）为目标平台的应用的 elegantTextHeight TextView 属性默认设置为 true，从而将紧凑字体替换为更易于阅读的字体。您可以通过将 elegantTextHeight 属性设置为 false 来替换此设置。

Android 16 弃用了 elegantTextHeight 属性，并且在您的应用以 Android 16 为目标平台后，系统会忽略该属性。这些 API 控制的“界面字体”即将停用，因此您应调整所有布局，以确保以阿拉伯语、老挝语、缅甸语、泰米尔语、古吉拉特语、卡纳达语、马拉雅拉姆语、奥里亚语、泰卢固语或泰语呈现一致且可持续的文字。

对于以 Android 14（API 级别 34）及更低版本为目标平台的应用，或者对于通过将 elegantTextHeight 属性设置为 false 而替换默认值的以 Android 15（API 级别 35）为目标平台的应用，elegantTextHeight 行为。
对于以 Android 16 为目标平台的应用，或者对于未通过将 elegantTextHeight 属性设置为 false 来替换默认值的以 Android 15（API 级别 35）为目标平台的应用，elegantTextHeight 行为。

Fonctionnalité de base

Android 16 inclut les modifications suivantes qui modifient ou étendent diverses fonctionnalités de base du système Android.

Optimisation de la planification des tâches à tarif fixe

Prior to targeting Android 16, when scheduleAtFixedRate missed a task execution due to being outside a valid process lifecycle, all missed executions immediately execute when the app returns to a valid lifecycle.

When targeting Android 16, at most one missed execution of scheduleAtFixedRate is immediately executed when the app returns to a valid lifecycle. This behavior change is expected to improve app performance. Test this behavior in your app to check if your app is impacted. You can also test by using the app compatibility framework and enabling the STPE_SKIP_MULTIPLE_MISSED_PERIODIC_TASKS compat flag.

Facteurs de forme des appareils

Android 16 inclut les modifications suivantes pour les applications lorsqu'elles sont affichées sur des appareils à grand écran.

Mises en page adaptatives

With Android apps now running on a variety of devices (such as phones, tablets, foldables, desktops, cars, and TVs) and windowing modes on large screens (such as split screen and desktop windowing), developers should build Android apps that adapt to any screen and window size, regardless of device orientation. Paradigms like restricting orientation and resizability are too restrictive in today's multidevice world.

Ignore orientation, resizability, and aspect ratio restrictions

For apps targeting Android 16, Android 16 includes changes to how the system manages orientation, resizability, and aspect ratio restrictions. On displays with smallest width >= 600dp, the restrictions no longer apply. Apps also fill the entire display window, regardless of aspect ratio or a user's preferred orientation, and pillarboxing isn't used.

This change introduces a new standard platform behavior. Android is moving toward a model where apps are expected to adapt to various orientations, display sizes, and aspect ratios. Restrictions like fixed orientation or limited resizability hinder app adaptability, so we recommend making your app adaptive to deliver the best possible user experience.

You can also test this behavior by using the [app compatibility framework][a16-kilo-14] and enabling the UNIVERSAL_RESIZABLE_BY_DEFAULT compat flag.

Common breaking changes

Ignoring orientation, resizability, and aspect ratio restrictions might impact your app's UI on some devices, especially elements that were designed for small layouts locked in portrait orientation: for example, issues like stretched layouts and off-screen animations and components. Any assumptions about aspect ratio or orientation can cause visual issues with your app. Learn more about how to avoid them and improve your app's adaptive behaviour.

Allowing device rotation results in more activity re-creation, which can result in losing user state if not properly preserved. Learn how to correctly save UI state in Save UI states.

Implementation details

The following manifest attributes and runtime APIs are ignored across large screen devices in full-screen and multi-window modes:

The following values for screenOrientation, setRequestedOrientation(), and getRequestedOrientation() are ignored:

  • portrait
  • reversePortrait
  • sensorPortrait
  • userPortrait
  • landscape
  • reverseLandscape
  • sensorLandscape
  • userLandscape

Regarding display resizability, android:resizeableActivity="false", android:minAspectRatio, and android:maxAspectRatio have no effect.

For apps targeting Android 16, app orientation, resizability, and aspect ratio constraints are ignored on large screens by default, but every app that isn't fully ready can temporarily override this behavior by opting out (which results in the previous behavior of being placed in compatibility mode).

Exceptions

The Android 16 orientation, resizability, and aspect ratio restrictions don't apply in the following situations:

  • Games (based on the android:appCategory flag)
  • Users explicitly opting in to the app's default behavior in aspect ratio settings of the device
  • Screens that are smaller than sw600dp

Opt out temporarily

To opt out a specific activity, declare the PROPERTY_COMPAT_ALLOW_RESTRICTED_RESIZABILITY manifest property:

<activity ...>
  <property android:name="android.window.PROPERTY_COMPAT_ALLOW_RESTRICTED_RESIZABILITY" android:value="true" />
  ...
</activity>

If too many parts of your app aren't ready for Android 16, you can opt out completely by applying the same property at the application level:

<application ...>
  <property android:name="android.window.PROPERTY_COMPAT_ALLOW_RESTRICTED_RESIZABILITY" android:value="true" />
</application>

Santé et remise en forme

Android 16 inclut les modifications suivantes concernant les données de santé et de remise en forme.

Autorisations de santé et remise en forme

Pour les applications ciblant Android 16 ou version ultérieure, les autorisations BODY_SENSORS passent aux autorisations précises sous android.permissions.health, également utilisées par Santé Connect. Toute API qui nécessitait auparavant BODY_SENSORS ou BODY_SENSORS_BACKGROUND nécessite désormais l'autorisation android.permissions.health correspondante. Cela affecte les types de données, les API et les types de services de premier plan suivants:

Si votre application utilise ces API, elle doit désormais demander les autorisations précises correspondantes:

Ces autorisations sont les mêmes que celles qui protègent l'accès à la lecture des données de Santé Connect, le datastore Android pour les données de santé, de remise en forme et de bien-être.