# Large screen orientation and resizability restrictions ignored on Android 17

> For apps targeting Android 17 or higher, orientation, resizability, and aspect ratio restrictions no longer apply on large displays with widths of 600dp or larger.




:::important
These breaking change docs are accurate, as of the release
under which they are published. Over time, the
workarounds described here might become inaccurate.
We don't, in general, keep these breaking change docs up
to date as of each release.

这些破坏性改动文档的准确性仅限于其发布时对应的版本。
随着时间的推移，文档中描述的方案可能会逐渐失效。
通常情况下，我们不会在每次发布新版本时都对这些文档进行同步更新。

The [breaking change index file](/release/breaking-changes)
lists the docs created for each release.

[破坏性改动列表](/release/breaking-changes) 
列出了每个版本的文档。

:::


## Summary

For apps targeting Android 17 or higher,
orientation, resizability, and aspect ratio restrictions no longer
apply on displays with width 600dp or greater.
This means that [`SystemChrome.setPreferredOrientations`][] is
ignored on these devices.

## Background

Android is shifting 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.
For more details, see [Android 17 behavior changes][].

In Android 16, this behavior was introduced as a default
but allowed apps to temporarily opt out
using the `PROPERTY_COMPAT_ALLOW_RESTRICTED_RESIZABILITY` manifest property.
Android 17 removes this opt-out.

## Description of change

If you rely on [`SystemChrome.setPreferredOrientations`][]
to lock your app to a specific orientation,
it is ignored on large screens (widths 600dp and larger)
if your app targets Android 17 or higher.
If your app supports Android 16
and you did not opt out of this behavior,
then it behaves the same on Android 17.

If your app relies on locking orientation,
make your app adaptive to support different screen sizes and orientations.
See the guidance for how to do this for large screens
in [Adaptive and responsive UI][].

## References

* [Android 17 behavior changes][]
* [Android 16 behavior changes][]
* [`SystemChrome.setPreferredOrientations`][]
* [Adaptive and responsive UI][]

[Android 17 behavior changes]: https://developer.android.com/about/versions/17/changes/ff-restrictions-ignored
[Android 16 behavior changes]: https://developer.android.com/about/versions/16/behavior-changes-16#ignore-orientation
[`SystemChrome.setPreferredOrientations`]: https://api.flutter-io.cn/flutter/services/SystemChrome/setPreferredOrientations.html
[Adaptive and responsive UI]: /ui/adaptive-responsive/large-screens