问检索令牌的登录页

EN

import 'dart:async';
import 'package:flutter_appauth/flutter_appauth.dart';
import 'package:flutter/material.dart';
import 'package:flutter_webview_plugin/flutter_webview_plugin.dart';
import 'package:flutter/services.dart';

class LoginScreen extends StatefulWidget {
  @override
  _LoginScreenState createState() => _LoginScreenState();
}

class _LoginScreenState extends State<LoginScreen> {

  final flutterWebviewPlugin = new FlutterWebviewPlugin();

  StreamSubscription _onDestroy;
  StreamSubscription<String> _onUrlChanged;
  StreamSubscription<WebViewStateChanged> _onStateChanged;

  String token;

  @override
  void dispose() {
    // Every listener should be canceled, the same should be done with this stream.
    _onDestroy.cancel();
    _onUrlChanged.cancel();
    _onStateChanged.cancel();
    flutterWebviewPlugin.dispose();
    super.dispose();
  }

  @override
  void initState() {
    super.initState();

    //flutterWebviewPlugin.close();

    // Add a listener to on destroy WebView, so you can make came actions.
    _onDestroy = flutterWebviewPlugin.onDestroy.listen((_) {
      print("destroy");
    });

    _onStateChanged =
        flutterWebviewPlugin.onStateChanged.listen((WebViewStateChanged state) {
          print("onStateChanged: ${state.type} ${state.url}");
        });

    // Add a listener to on url changed
    _onUrlChanged = flutterWebviewPlugin.onUrlChanged.listen((String url) {
      if (mounted) {
        setState(() {
          print("URL changed: $url");
        //flutterWebviewPlugin.close();

        });
      }
    });
  }


  @override
  Widget build(BuildContext context) {
    String url = "http://login/page";
    return WebviewScaffold(
      appBar: AppBar(
        title: Text("Login"),
      ),
      url: url,
      withZoom: false,

    );
  }
}