examples/flutter_gallery/lib/demo/rally/login.dart

// Copyright 2019-present the Flutter authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import 'package:flutter/material.dart';

class LoginPage extends StatefulWidget {
  @override
  _LoginPageState createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  final TextEditingController _usernameController = TextEditingController();
  final TextEditingController _passwordController = TextEditingController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        elevation: 0,
        leading: IconButton(
          icon: const BackButtonIcon(),
          tooltip: MaterialLocalizations.of(context).backButtonTooltip,
          onPressed: () {
            Navigator.of(context, rootNavigator: true).pop();
          },
        ),
      ),
      body: SafeArea(
        child: GestureDetector(
          onTap: () {
            Navigator.pop(context);
          },
          child: ListView(
            padding: const EdgeInsets.symmetric(horizontal: 24),
            children: <Widget>[
              Padding(
                padding: const EdgeInsets.symmetric(vertical: 64),
                child: SizedBox(
                  height: 160,
                  child: Image.asset(
                    'logo.png',
                    package: 'rally_assets',
                  ),
                ),
              ),
              TextField(
                controller: _usernameController,
                decoration: const InputDecoration(
                  labelText: 'Username',
                ),
              ),
              const SizedBox(height: 12),
              TextField(
                controller: _passwordController,
                decoration: const InputDecoration(
                  labelText: 'Password',
                ),
                obscureText: true,
              ),
              SizedBox(
                height: 120,
                child: Image.asset(
                  'thumb.png',
                  package: 'rally_assets',
                ),
              ),
            ],
          ),
        ),
      ),
    );
  }

  @override
  void dispose() {
    _usernameController.dispose();
    _passwordController.dispose();
    super.dispose();
  }
}