Android: no announcement path for live regions

[estekovics]

The problem: the Android adapter puts a node's live region on the node info, but nothing in the event path consults live(). It is read in exactly one place:

accesskit/adapters/android/src/node.rs

Lines 417 to 423 in 2dfdd7b

	let live = match self.0.live() {
	Live::Off => LIVE_REGION_NONE,
	Live::Polite => LIVE_REGION_POLITE,
	Live::Assertive => LIVE_REGION_ASSERTIVE,
	};
	env.call_method(node_info, "setLiveRegion", "(I)V", &[live.into()])
	.unwrap();

What gets emitted instead. node_added enqueues only a host-level content-changed event; the gap is already marked (// TODO: live regions?):

accesskit/adapters/android/src/adapter.rs

Lines 83 to 87 in 2dfdd7b

	impl TreeChangeHandler for AdapterChangeHandler<'_> {
	fn node_added(&mut self, _node: &NodeRef) {
	self.enqueue_window_content_changed_if_needed();
	// TODO: live regions?
	}

That event is sourced at HOST_VIEW_ID (-1), never at the changed node, and send_window_content_changed stamps it CONTENT_CHANGE_TYPE_SUBTREE, so setLiveRegion never rides on an event a screen reader could key off:

accesskit/adapters/android/src/adapter.rs

Lines 30 to 34 in 2dfdd7b

	fn enqueue_window_content_changed(events: &mut Vec<QueuedEvent>) {
	events.push(QueuedEvent::WindowContentChanged {
	virtual_view_id: HOST_VIEW_ID,
	});
	}

The one per-node event is the wrong one. TYPE_VIEW_TEXT_CHANGED is pushed from a single site, in node_updated, gated on text():

accesskit/adapters/android/src/adapter.rs

Lines 96 to 105 in 2dfdd7b

	let old_text = old_wrapper.text();
	let new_text = new_wrapper.text();
	if old_text != new_text {
	let id = self.node_id_map.get_or_create_java_id(new_node);
	self.events.push(QueuedEvent::TextChanged {
	virtual_view_id: id,
	old: old_text.unwrap_or_else(String::new),
	new: new_text.clone().unwrap_or_else(String::new),
	});
	}

and text() is value() or the text-range document, so labels never reach it:

accesskit/adapters/android/src/node.rs

Lines 85 to 91 in 2dfdd7b

	pub(crate) fn text(&self) -> Option<String> {
	self.0.value().or_else(|| {
	self.0
	.supports_text_ranges()
	.then(|| self.0.document_range().text())
	})
	}

It is also an editing event (before-text, added/removed counts), not an announcement, and node_added cannot reach it. TYPE_ANNOUNCEMENT appears nowhere under adapters/android/.

Expected: a Live::Polite/Live::Assertive node whose label or value changes, or that is added already carrying it, produces something TalkBack speaks.

Actual: only the host-sourced TYPE_WINDOW_CONTENT_CHANGED/SUBTREE; neither a label nor a value change produces any node-sourced event. Worse than iOS, which does announce value changes (adapters/ios/src/event.rs gates announcements on value() — #765 is the label gap there).

Triggering sequence: the announcement node in winit's simple.rs — Role::Label + set_value + set_live(Live::Polite), pushed as a new child, so it lands in node_added.

Tested/untested: every Android claim is from the code at 2dfdd7b, not from a run — I have no Android device, and the repo ships no Android harness (no android_main, no gradle project or manifest). The iOS side of the comparison I have exercised on a physical iPhone. Filing as a report.

(Drafted with AI assistance; the code reading is mine.)