Support both portrait and landscape orientations in accordance with the WCAG Success Criterion 1.3.4 Orientation using the following techniques.
In AndroidManifest.xml, avoid setting any <activity/> element's android:screenOrientation to a value that fixes the orientation. In other words, avoid portrait, landscape, etc., in favor of unspecified (the default), sensor, fullSensor, user, or fullUser orientations. (See the android:screenOrientation documentation for more details.)
On all full-screen layouts, implement <ScrollView> (or a scrolling list such as <RecyclerView>) so the page can adapt to different orientations (as well as different device sizes) without loss of content.
When appropriate, provide alternative layouts for different orientations in res/layout-land, res/layout-port, and related folders. (See App resources overview for more details.)
Preserve application state across configurations changes (such as orientation change) using ViewModels or other techniques as described in Handle configuration changes.
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