Adds new flutter module, reconfigures Android/iOS sample (#144)

experimental/add_to_app/flutter_module_using_plugin/.gitignore

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+.DS_Store
+.dart_tool/
+
+.packages
+.pub/
+
+.idea/
+.vagrant/
+.sconsign.dblite
+.svn/
+
+*.swp
+profile
+
+DerivedData/
+
+.generated/
+
+*.pbxuser
+*.mode1v3
+*.mode2v3
+*.perspectivev3
+
+!default.pbxuser
+!default.mode1v3
+!default.mode2v3
+!default.perspectivev3
+
+xcuserdata
+
+*.moved-aside
+
+*.pyc
+*sync/
+Icon?
+.tags*
+
+build/
+.android/
+.ios/
+.flutter-plugins

experimental/add_to_app/flutter_module_using_plugin/.metadata

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+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: 2d2a1ffec95cc70a3218872a2cd3f8de4933c42f
+  channel: stable
+
+project_type: module

experimental/add_to_app/flutter_module_using_plugin/README.md

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+# flutter_module_using_plugin
+
+An example Flutter module that uses a plugin and is consumed by native apps
+in the Flutter add-to-app samples.
+
+## Getting Started
+
+For more information, see the Add-to-App guide at
+[flutter.dev](https://flutter.dev):
+
+https://github.com/flutter/flutter/wiki/Add-Flutter-to-existing-apps

experimental/add_to_app/flutter_module_using_plugin/lib/main.dart

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+// Copyright 2019 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:io';
+
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+import 'package:path_provider/path_provider.dart' as paths;
+
+void main() => runApp(MyApp());
+
+class MyApp extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Flutter Module Title',
+      routes: {
+        '/': (context) => FullScreenView(),
+        '/mini': (context) => Contents(),
+      },
+    );
+  }
+}
+
+class FullScreenView extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('Full-screen Flutter with plugin'),
+      ),
+      body: const Contents(showExit: true),
+    );
+  }
+}
+
+class Contents extends StatefulWidget {
+  final bool showExit;
+
+  const Contents({this.showExit = false});
+
+  @override
+  _ContentsState createState() => _ContentsState();
+}
+
+class _ContentsState extends State<Contents> {
+  int count = 0;
+
+  // Start off with a completed future so the FutureBuilder code below doesn't
+  // need to worry about null.
+  Future<void> saveFuture = Future.value(null);
+
+  Future<void> _saveCount() async {
+    final dir = await paths.getApplicationDocumentsDirectory();
+    final file = File('${dir.path}/count.txt');
+    setState(() {
+      saveFuture = file.writeAsString('$count\n');
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final mediaInfo = MediaQuery.of(context);
+
+    return SizedBox.expand(
+      child: Stack(
+        children: [
+          Positioned.fill(
+            child: DecoratedBox(
+              decoration: BoxDecoration(
+                color: Theme.of(context).scaffoldBackgroundColor,
+              ),
+            ),
+          ),
+          Positioned.fill(
+            child: Opacity(
+              opacity: .25,
+              child: FittedBox(
+                fit: BoxFit.cover,
+                child: FlutterLogo(),
+              ),
+            ),
+          ),
+          Center(
+            child: Column(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                Text(
+                  'Window is ${mediaInfo.size.width.toStringAsFixed(1)} x '
+                  '${mediaInfo.size.height.toStringAsFixed(1)}',
+                  style: Theme.of(context).textTheme.headline,
+                ),
+                SizedBox(height: 16),
+                Text(
+                  'Taps: $count',
+                  style: Theme.of(context).textTheme.headline,
+                ),
+                SizedBox(height: 16),
+                RaisedButton(
+                  onPressed: () => setState(() => count++),
+                  child: Text('Tap me!'),
+                ),
+                FutureBuilder(
+                  future: saveFuture,
+                  builder: (context, snapshot) {
+                    if (snapshot.connectionState == ConnectionState.done) {
+                      return RaisedButton(
+                        onPressed: _saveCount,
+                        child: Text('Save count'),
+                      );
+                    } else {
+                      return RaisedButton(
+                        onPressed: null,
+                        child: Text('Save count'),
+                      );
+                    }
+                  },
+                ),
+                if (widget.showExit) ...[
+                  SizedBox(height: 16),
+                  RaisedButton(
+                    onPressed: () => SystemNavigator.pop(),
+                    child: Text('Exit this screen'),
+                  ),
+                ],
+              ],
+            ),
+          ),
+        ],
+      ),
+    );
+  }
+}

experimental/add_to_app/flutter_module_using_plugin/pubspec.lock

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+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  archive:
+    dependency: transitive
+    description:
+      name: archive
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.10"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.5.2"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.0"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.5"
+  charcode:
+    dependency: transitive
+    description:
+      name: charcode
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.2"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.14.11"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.1"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.3"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  image:
+    dependency: transitive
+    description:
+      name: image
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.4"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.12.5"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.7"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.6.4"
+  path_provider:
+    dependency: "direct main"
+    description:
+      name: path_provider
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.0"
+  pedantic:
+    dependency: transitive
+    description:
+      name: pedantic
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.8.0+1"
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.4.0"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.1"
+  quiver:
+    dependency: transitive
+    description:
+      name: quiver
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.5"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.99"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.5.5"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.9.3"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.5"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.2.5"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.6"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.8"
+  xml:
+    dependency: transitive
+    description:
+      name: xml
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.5.0"
+sdks:
+  dart: ">=2.5.0 <3.0.0"
+  flutter: ">=0.1.4 <2.0.0"

experimental/add_to_app/flutter_module_using_plugin/pubspec.yaml

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+name: flutter_module_using_plugin
+description: An example Flutter module that uses a plugin.
+
+version: 1.0.0+1
+
+environment:
+  sdk: ">=2.5.0 <3.0.0"
+
+dependencies:
+  flutter:
+    sdk: flutter
+  path_provider: ^1.3.0
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+flutter:
+  uses-material-design: true
+
+  # This section identifies your Flutter project as a module meant for
+  # embedding in a native host app.  These identifiers should _not_ ordinarily
+  # be changed after generation - they are used to ensure that the tooling can
+  # maintain consistency when adding or modifying assets and plugins.
+  # They also do not have any bearing on your native host application's
+  # identifiers, which may be completely independent or the same as these.
+  module:
+    androidX: true
+    androidPackage: dev.flutter.example.flutter_module_using_plugin
+    iosBundleIdentifier: dev.flutter.example.flutterModuleUsingPlugin

experimental/add_to_app/flutter_module_using_plugin/test/widget_test.dart

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+// This is a basic Flutter widget test.
+//
+// To perform an interaction with a widget in your test, use the WidgetTester
+// utility that Flutter provides. For example, you can send tap and scroll
+// gestures. You can also use WidgetTester to find child widgets in the widget
+// tree, read text, and verify that the values of widget properties are correct.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:flutter_module_using_plugin/main.dart';
+
+void main() {
+  testWidgets('MiniView smoke test', (WidgetTester tester) async {
+    // Build our app and trigger a frame.
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Contents(),
+      ),
+    );
+
+    // Verify that our counter starts at 0.
+    expect(find.text('Taps: 0'), findsOneWidget);
+    expect(find.text('Taps: 1'), findsNothing);
+
+    // Tap the '+' icon and trigger a frame.
+    await tester.tap(find.text('Tap me!'));
+    await tester.pump();
+
+    // Verify that our counter has incremented.
+    expect(find.text('Taps: 0'), findsNothing);
+    expect(find.text('Taps: 1'), findsOneWidget);
+  });
+}