main.dart

import 'package:flutter/material.dart';

class LoginPage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    void _profile() {
      Navigator.popAndPushNamed(context, "/Profile");
    }
    return new Scaffold(
      floatingActionButton: new FloatingActionButton(
        onPressed: _profile,
        child: new Icon(Icons.navigate_next),
      ),
    );
  }
}

class Profile extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      body: new Center(
        child: new Text('You made it!'),
      ),
    );
  }
}

void main() {
  runApp(new MaterialApp(
    home: new LoginPage(),

  routes: <String, WidgetBuilder>
  {
  "/Profile": (BuildContext context) => new Profile(),
  }
  ));
}