如何检测webviewurl何时在颤动中发生变化？

您可以使用StreamSubscription.

StreamSubscription _onStateChanged;
final flutterWebviewPlugin = new FlutterWebviewPlugin();
@override
void initState() {
super.initState(); _OnStateChanged=
flutterWebviewPlugin.onUrlChanged.listen((String state) async {
if (state.startsWith('your_url')) {
// do whatever you want
}
});
}