Turning off a11y while Flutter app is running is not propagated to app on Android #17665
Description
flutter runan app.- Press
S, it prints "No semantics collected" - Enable TalkBack via a11y shortcut while app is running
- Press
Sagain, it prints the semantics tree. - Turn off TalkBack via a11y shortcut while app is running.
- Press
Sagain, it should print "No Semantics collected", but it still prints the semantics tree.
Navigating around the app after the last step will also result in various exceptions because Android rightfully things a11y is off while flutter thinks it's still on:
E/FlutterView( 9685): Uncaught exception while updating semantics
E/FlutterView( 9685): java.lang.IllegalStateException: Accessibility off. Did you forget to check that?
E/FlutterView( 9685): at android.view.accessibility.AccessibilityManager.sendAccessibilityEvent(AccessibilityManager.java:407)
E/FlutterView( 9685): at android.view.ViewRootImpl.requestSendAccessibilityEvent(ViewRootImpl.java:7113)
E/FlutterView( 9685): at android.view.ViewGroup.requestSendAccessibilityEvent(ViewGroup.java:980)
E/FlutterView( 9685): at android.view.ViewGroup.requestSendAccessibilityEvent(ViewGroup.java:980)
E/FlutterView( 9685): at android.view.ViewGroup.requestSendAccessibilityEvent(ViewGroup.java:980)
E/FlutterView( 9685): at io.flutter.view.AccessibilityBridge.createWindowChangeEvent(AccessibilityBridge.java:693)
E/FlutterView( 9685): at io.flutter.view.AccessibilityBridge.updateSemantics(AccessibilityBridge.java:505)
E/FlutterView( 9685): at io.flutter.view.FlutterView.updateSemantics(FlutterView.java:765)
E/FlutterView( 9685): at io.flutter.view.FlutterNativeView.updateSemantics(FlutterNativeView.java:182)
E/FlutterView( 9685): at android.os.MessageQueue.nativePollOnce(Native Method)
E/FlutterView( 9685): at android.os.MessageQueue.next(MessageQueue.java:325)
E/FlutterView( 9685): at android.os.Looper.loop(Looper.java:142)
E/FlutterView( 9685): at android.app.ActivityThread.main(ActivityThread.java:6541)
E/FlutterView( 9685): at java.lang.reflect.Method.invoke(Native Method)
E/FlutterView( 9685): at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
E/FlutterView( 9685): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)