CheckBox and RadioButton don’t announce changed state

[goderbauer]

On Android.

[btastic]

Correct me if I am wrong, but I think you have to do it by yourself as far as I can read from this:

flutter/packages/flutter/lib/src/material/checkbox.dart

Lines 63 to 84 in 09a6df7

	/// Called when the value of the checkbox should change.
	///
	/// The checkbox passes the new value to the callback but does not actually
	/// change state until the parent widget rebuilds the checkbox with the new
	/// value.
	///
	/// If null, the checkbox will be displayed as disabled.
	///
	/// The callback provided to [onChanged] should update the state of the parent
	/// [StatefulWidget] using the [State.setState] method, so that the parent
	/// gets rebuilt; for example:
	///
	/// ```dart
	/// new Checkbox(
	/// value: _throwShotAway,
	/// onChanged: (bool newValue) {
	/// setState(() {
	/// _throwShotAway = newValue;
	/// });
	/// },
	/// )
	/// ```

[goderbauer]

@btastic This bug is about screenreader's (like TalkBack on Android) not announcing when a focused checkbox switches from checked to unchecked. Sorry for the confusion.

[goderbauer]

TalkBack can be triggered to announce the change of state by sending a TYPE_VIEW_CLICKED event.

[goderbauer]

This works fine on iOS.

[github-actions]

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