Listening for redirect

Using WebView Plugin to launch facebook oauth connection flow. It seems user has to be logged-in first (see image) to display facebook oauth permission dialog.

One option will be to open facebook login screen then redirect back to app (on successful login) before launching oauth connection flow.

For this to work I need to be able to listen for a redirect from fb's login screen to fb's home screen (after login) at which point, return back to the app and launch connection flow. It seems plugin is not able to detect the redirect - plugin.onUrlChanged() is not triggered after authentication (redirect from login screen to home screen).

new FlatButton(
child: const Text("Ok"),
onPressed: () {
launchWebView();

}),

void launchWebView(){
flutterWebviewPlugin.launch(
'https://m.facebook.com/',
withJavascript: true,
withLocalStorage: true,
);
//Not triggered
flutterWebviewPlugin.onUrlChanged.listen((String changed) {
if(changed.contains('https://m.facebook.com/home.php')){
setState(() {
//reload webview with connection flow url
});
}

});
}

[![enter image description here][1]][1]

[1]: https://i.stack.imgur.com/QTeLw.png

launchWebView() から flutterWebviewPlugin.launch() を使用して Facebook のログインフローを再現し、続いてログインから home.php へのリダイレクト中に plugin.onUrlChanged listener を追跡します。認証後にリダイレクトが検出され、アプリが戻って接続フローを起動できれば完了です。

索引モデルが issue の本文から書いたものです。