gistfile1.txt

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatefulWidget {
  @override
  _LoginDemoState createState() => _LoginDemoState();
}

class _LoginDemoState extends State<MyApp> {
  bool switchValue = false;

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        canvasColor: switchValue ? Colors.black : Colors.white,
        primaryColor: switchValue ? Colors.white : Colors.black,
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        appBar: AppBar(
          title: Text("Login Page"),
        ),
        body: SingleChildScrollView(
          child: Column(
            children: <Widget>[
              Switch(
                value: switchValue,
                onChanged: (bool state) {
                  setState(() {
                    switchValue = state;
                  });
                },
              ),
              Padding(
                padding: const EdgeInsets.only(top: 60.0),
                child: Center(
                  child: Container(width: 200, height: 150, child: FlutterLogo()),
                ),
              ),
              Padding(
                padding: EdgeInsets.symmetric(horizontal: 15),
                child: TextField(
                  decoration: InputDecoration(
                      border: OutlineInputBorder(),
                      labelText: 'Email',
                      hintText: 'Enter valid email id as [email protected]'),
                ),
              ),
              Padding(
                padding: const EdgeInsets.only(left: 15.0, right: 15.0, top: 15, bottom: 0),
                child: TextField(
                  obscureText: true,
                  decoration: InputDecoration(
                      border: OutlineInputBorder(), labelText: 'Password', hintText: 'Enter secure password'),
                ),
              ),
              TextButton(
                onPressed: () {},
                child: Text(
                  'Forgot Password',
                  style: TextStyle(fontSize: 15),
                ),
              ),
              Container(
                height: 50,
                width: 250,
                decoration: BoxDecoration(borderRadius: BorderRadius.circular(20)),
                child: TextButton(
                  onPressed: () {},
                  child: Text(
                    'Login',
                    style: TextStyle(fontSize: 25),
                  ),
                ),
              ),
              SizedBox(
                height: 130,
              ),
              Text('New User? Create Account')
            ],
          ),
        ),
      ),
    );
  }

}