Adding Rally App to Flutter Samples (#135)

material_studies/rally/lib/login.dart

@@ -0,0 +1,68 @@
+// 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 _usernameController = TextEditingController();
+  final _passwordController = TextEditingController();
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      body: SafeArea(
+        child: GestureDetector(
+          onTap: () {
+            Navigator.pop(context);
+          },
+          child: ListView(
+            padding: EdgeInsets.symmetric(horizontal: 24),
+            children: [
+              Padding(
+                padding: const EdgeInsets.symmetric(vertical: 64),
+                child: SizedBox(
+                  height: 160,
+                  child: Image.asset('assets/logo.png'),
+                ),
+              ),
+              TextField(
+                controller: _usernameController,
+                decoration: InputDecoration(
+                  labelText: 'Username',
+                ),
+              ),
+              SizedBox(height: 12),
+              TextField(
+                controller: _passwordController,
+                decoration: InputDecoration(
+                  labelText: 'Password',
+                ),
+                obscureText: true,
+              ),
+              SizedBox(
+                height: 120,
+                child: Image.asset('assets/thumb.png'),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}