remove unnecessary new from samples (#818)

packages/android_alarm_manager/README.md

@@ -22,7 +22,7 @@ Then in Dart code add:
 import 'package:android_alarm_manager/android_alarm_manager.dart';
 
 void printHello() {
-  final DateTime now = new DateTime.now();
+  final DateTime now = DateTime.now();
   final int isolateId = Isolate.current.hashCode;
   print("[$now] Hello, world! isolate=${isolateId} function='$printHello'");
 }

packages/android_intent/README.md

@@ -7,9 +7,9 @@ mode, we assert that the platform should be Android.
 Use it by specifying action, category, data and extra arguments for the intent.
 It does not support returning the result of the launched activity. Sample usage:
 
-```
+```dart
 if (platform.isAndroid) {
-  AndroidIntent intent = new AndroidIntent(
+  AndroidIntent intent = AndroidIntent(
       action: 'action_view',
       data: 'https://play.google.com/store/apps/details?'
           'id=com.google.android.apps.myapp',

packages/battery/README.md

@@ -14,7 +14,7 @@ To use this plugin, add `battery` as a [dependency in your pubspec.yaml file](ht
 import 'package:battery/battery.dart';
 
 // Instantiate it
-var battery = new Battery();
+var battery = Battery();
 
 // Access current battery level
 print(battery.batteryLevel);

packages/camera/README.md

@@ -50,12 +50,12 @@ List<CameraDescription> cameras;
 
 Future<Null> main() async {
   cameras = await availableCameras();
-  runApp(new CameraApp());
+  runApp(CameraApp());
 }
 
 class CameraApp extends StatefulWidget {
   @override
-  _CameraAppState createState() => new _CameraAppState();
+  _CameraAppState createState() => _CameraAppState();
 }
 
 class _CameraAppState extends State<CameraApp> {
@@ -64,7 +64,7 @@ class _CameraAppState extends State<CameraApp> {
   @override
   void initState() {
     super.initState();
-    controller = new CameraController(cameras[0], ResolutionPreset.medium);
+    controller = CameraController(cameras[0], ResolutionPreset.medium);
     controller.initialize().then((_) {
       if (!mounted) {
         return;
@@ -82,12 +82,12 @@ class _CameraAppState extends State<CameraApp> {
   @override
   Widget build(BuildContext context) {
     if (!controller.value.isInitialized) {
-      return new Container();
+      return Container();
     }
-    return new AspectRatio(
+    return AspectRatio(
         aspectRatio:
         controller.value.aspectRatio,
-        child: new CameraPreview(controller));
+        child: CameraPreview(controller));
   }
 }
 ```

packages/cloud_firestore/README.md

@@ -44,15 +44,15 @@ Binding a `CollectionReference` to a `ListView`:
 class BookList extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return new StreamBuilder<QuerySnapshot>(
+    return StreamBuilder<QuerySnapshot>(
       stream: Firestore.instance.collection('books').snapshots(),
       builder: (BuildContext context, AsyncSnapshot<QuerySnapshot> snapshot) {
-        if (!snapshot.hasData) return new Text('Loading...');
-        return new ListView(
+        if (!snapshot.hasData) return Text('Loading...');
+        return ListView(
           children: snapshot.data.documents.map((DocumentSnapshot document) {
-            return new ListTile(
-              title: new Text(document['title']),
-              subtitle: new Text(document['author']),
+            return ListTile(
+              title: Text(document['title']),
+              subtitle: Text(document['author']),
             );
           }).toList(),
         );

packages/connectivity/README.md

@@ -12,7 +12,7 @@ Sample usage to check current status:
 ```dart
 import 'package:connectivity/connectivity.dart';
 
-var connectivityResult = await (new Connectivity().checkConnectivity());
+var connectivityResult = await (Connectivity().checkConnectivity());
 if (connectivityResult == ConnectivityResult.mobile) {
   // I am connected to a mobile network.
 } else if (connectivityResult == ConnectivityResult.wifi) {
@@ -31,7 +31,7 @@ exposed by connectivity plugin:
 import 'package:connectivity/connectivity.dart';
 
 initState() {
-  subscription = new Connectivity().onConnectivityChanged.listen((ConnectivityResult result) {
+  subscription = Connectivity().onConnectivityChanged.listen((ConnectivityResult result) {
     // Got a new connectivity status!
   })
 }

packages/device_info/README.md

@@ -13,7 +13,7 @@ Example:
 ```dart
 import 'package:device_info/device_info.dart';
 
-DeviceInfoPlugin deviceInfo = new DeviceInfoPlugin();
+DeviceInfoPlugin deviceInfo = DeviceInfoPlugin();
 AndroidDeviceInfo androidInfo = await deviceInfo.androidInfo;
 print('Running on ${androidInfo.model}');  // e.g. "Moto G (4)"
 

packages/firebase_admob/README.md

@@ -16,21 +16,21 @@ FirebaseAdMob.instance.initialize(appId: appId);
 ```
 
 ## Using banners and interstitials
-Banner and interstitial ads can be configured with target information. 
+Banner and interstitial ads can be configured with target information.
 And in the example below, the ads are given test ad unit IDs for a quick start.
 
-```
-MobileAdTargetingInfo targetingInfo = new MobileAdTargetingInfo(
+```dart
+MobileAdTargetingInfo targetingInfo = MobileAdTargetingInfo(
   keywords: <String>['flutterio', 'beautiful apps'],
   contentUrl: 'https://flutter.io',
-  birthday: new DateTime.now(),
+  birthday: DateTime.now(),
   childDirected: false,
   designedForFamilies: false,
   gender: MobileAdGender.male, // or MobileAdGender.female, MobileAdGender.unknown
   testDevices: <String>[], // Android emulators are considered test devices
 );
 
-BannerAd myBanner = new BannerAd(
+BannerAd myBanner = BannerAd(
   // Replace the testAdUnitId with an ad unit id from the AdMob dash.
   // https://developers.google.com/admob/android/test-ads
   // https://developers.google.com/admob/ios/test-ads
@@ -42,7 +42,7 @@ BannerAd myBanner = new BannerAd(
   },
 );
 
-InterstitialAd myInterstitial = new InterstitialAd(
+InterstitialAd myInterstitial = InterstitialAd(
   // Replace the testAdUnitId with an ad unit id from the AdMob dash.
   // https://developers.google.com/admob/android/test-ads
   // https://developers.google.com/admob/ios/test-ads

packages/firebase_admob/lib/firebase_admob.dart

@@ -404,7 +404,7 @@ class RewardedVideoAd {
 ///
 /// Apps can create, load, and show mobile ads. For example:
 /// ```
-/// BannerAd myBanner = new BannerAd(unitId: myBannerAdUnitId)
+/// BannerAd myBanner = BannerAd(unitId: myBannerAdUnitId)
 ///   ..load()
 ///   ..show();
 /// ```

packages/firebase_analytics/README.md

@@ -18,12 +18,12 @@ To track `PageRoute` transitions, add a `FirebaseAnalyticsObserver` to the list
 
 ```dart
 
-FirebaseAnalytics analytics = new FirebaseAnalytics();
+FirebaseAnalytics analytics = FirebaseAnalytics();
 
 MaterialApp(
-  home: new MyAppHome(),
+  home: MyAppHome(),
   navigatorObservers: [
-    new FirebaseAnalyticsObserver(analytics: analytics),
+    FirebaseAnalyticsObserver(analytics: analytics),
   ],
 );
 ```

packages/firebase_analytics/lib/firebase_analytics.dart

@@ -36,7 +36,7 @@ class FirebaseAnalytics {
   ///
   /// Example:
   ///
-  ///     FirebaseAnalytics analytics = new FirebaseAnalytics();
+  ///     FirebaseAnalytics analytics = FirebaseAnalytics();
   ///     analytics.android?.setMinimumSessionDuration(200000);
   final FirebaseAnalyticsAndroid android;
 

packages/firebase_analytics/lib/observer.dart

@@ -27,9 +27,9 @@ String defaultNameExtractor(RouteSettings settings) => settings.name;
 /// ```dart
 /// Navigator.pushNamed(context, '/contact/123');
 ///
-/// Navigator.push(context, new MaterialPageRoute(
-///   settings: new RouteSettings(name: '/contact/123',
-///   builder: new ContactDetail(123)))),
+/// Navigator.push(context, MaterialPageRoute(
+///   settings: RouteSettings(name: '/contact/123',
+///   builder: ContactDetail(123)))),
 ///
 /// Navigator.pop(context);
 /// ```
@@ -38,9 +38,9 @@ String defaultNameExtractor(RouteSettings settings) => settings.name;
 /// you're using a [MaterialApp]:
 /// ```dart
 /// MaterialApp(
-///   home: new MyAppHome(),
+///   home: MyAppHome(),
 ///   navigatorObservers: [
-///     new FirebaseAnalyticsObserver(analytics: service.analytics),
+///     FirebaseAnalyticsObserver(analytics: service.analytics),
 ///   ],
 /// );
 /// ```

packages/firebase_dynamic_links/README.md

@@ -29,28 +29,28 @@ https://example.page.link/WXYZ
 You can create a Dynamic Link programmatically by setting the following parameters and using the `DynamicLinkParameters.buildUrl()` method.
 
 ```dart
-final DynamicLinkParameters parameters = new DynamicLinkParameters(
+final DynamicLinkParameters parameters = DynamicLinkParameters(
   domain: 'abc123.app.goo.gl',
   link: Uri.parse('https://example.com/'),
-  androidParameters: new AndroidParameters(
+  androidParameters: AndroidParameters(
       packageName: 'com.example.android',
       minimumVersion: 125,
   ),
-  iosParameters: new IosParameters(
+  iosParameters: IosParameters(
       bundleId: 'com.example.ios',
       minimumVersion: '1.0.1',
       appStoreId: '123456789',
   ),
-  googleAnalyticsParameters: new GoogleAnalyticsParameters(
+  googleAnalyticsParameters: GoogleAnalyticsParameters(
       campaign: 'example-promo',
       medium: 'social',
       source: 'orkut',
   ),
-  itunesConnectAnalyticsParameters: new ItunesConnectAnalyticsParameters(
+  itunesConnectAnalyticsParameters: ItunesConnectAnalyticsParameters(
     providerToken: '123456',
     campaignToken: 'example-promo',
   ),
-  socialMetaTagParameters:  new SocialMetaTagParameters(
+  socialMetaTagParameters:  SocialMetaTagParameters(
     title: 'Example of a Dynamic Link',
     description: 'This link works whether app is installed or not!',
   ),
@@ -71,7 +71,7 @@ To shorten a long Dynamic Link, use the DynamicLinkParameters.shortenUrl method.
 ```dart
 final ShortDynamicLink shortenedLink = await DynamicLinkParameters.shortenUrl(
   Uri.parse('https://example.page.link/?link=https://example.com/&apn=com.example.android&ibn=com.example.ios'),
-  new DynamicLinkParametersOptions(ShortDynamicLinkPathLength.unguessable),
+  DynamicLinkParametersOptions(ShortDynamicLinkPathLength.unguessable),
 );
 
 final Uri shortUrl = shortenedLink.shortUrl;
@@ -101,11 +101,11 @@ applinks:YOUR_SUBDOMAIN.page.link
 
 ```dart
 void main() {
-  runApp(new MaterialApp(
+  runApp(MaterialApp(
     title: 'Dynamic Links Example',
     routes: <String, WidgetBuilder>{
-      '/': (BuildContext context) => new MyHomeWidget(), // Default home route
-      '/helloworld': (BuildContext context) => new MyHelloWorldWidget(),
+      '/': (BuildContext context) => MyHomeWidget(), // Default home route
+      '/helloworld': (BuildContext context) => MyHelloWorldWidget(),
     },
   ));
 }

packages/firebase_messaging/README.md

@@ -52,7 +52,7 @@ From your Dart code, you need to import the plugin and instantiate it:
 ```dart
 import 'package:firebase_messaging/firebase_messaging.dart';
 
-final FirebaseMessaging _firebaseMessaging = new FirebaseMessaging();
+final FirebaseMessaging _firebaseMessaging = FirebaseMessaging();
 ```
 
 Next, you should probably request permissions for receiving Push Notifications. For this, call `_firebaseMessaging.requestNotificationPermissions()`. This will bring up a permissions dialog for the user to confirm on iOS. It's a no-op on Android. Last, but not least, register `onMessage`, `onResume`, and `onLaunch` callbacks via `_firebaseMessaging.configure()` to listen for incoming messages (see table below for more information).

packages/firebase_performance/README.md

@@ -70,11 +70,10 @@ class _MyAppState extends State<MyApp> {
 .
 .
   Future<void> testHttpMetric() async {
-    final _MetricHttpClient metricHttpClient =
-        new _MetricHttpClient(new Client());
+    final _MetricHttpClient metricHttpClient = _MetricHttpClient(Client());
 
     final Request request =
-        new Request("SEND", Uri.parse("https://www.google.com"));
+        Request("SEND", Uri.parse("https://www.google.com"));
 
     metricHttpClient.send(request);
   }

packages/google_maps_flutter/README.md

@@ -50,7 +50,7 @@ import 'package:google_maps_flutter/google_maps_flutter.dart';
 
 void main() {
   runApp(MaterialApp(
-    home: new Scaffold(
+    home: Scaffold(
       appBar: AppBar(title: const Text('Google Maps demo')),
       body: MapsDemo(),
     ),

packages/google_sign_in/README.md

@@ -23,8 +23,8 @@ enable the [Google People API](https://developers.google.com/people/).
 1. [First register your application](https://developers.google.com/mobile/add?platform=ios).
 2. Open Xcode. You'll have to paste this into Xcode to properly register `GoogleServices-Info.plist`.
 3. Select `GoogleServices-Info.plist` from the file manager and drag that file into the `Runner` directory, `[my_project]/ios/Runner/GoogleServices-Info.plist`.
-4. A dialog will show up and ask you to select the targets, select the `Runner` target.  
-5. Then add the `CFBundleURLTypes` attributes below into the `[my_project]/ios/Runner/Info.plist` file.  
+4. A dialog will show up and ask you to select the targets, select the `Runner` target.
+5. Then add the `CFBundleURLTypes` attributes below into the `[my_project]/ios/Runner/Info.plist` file.
 
 ```
 <!-- Put me in the [my_project]/ios/Runner/Info.plist file -->
@@ -59,8 +59,8 @@ import 'package:google_sign_in/google_sign_in.dart';
 
 Initialize GoogleSignIn with the scopes you want:
 
-```
-GoogleSignIn _googleSignIn = new GoogleSignIn(
+```dart
+GoogleSignIn _googleSignIn = GoogleSignIn(
   scopes: [
     'email',
     'https://www.googleapis.com/auth/contacts.readonly',

packages/google_sign_in/lib/testing.dart

@@ -15,9 +15,9 @@ import 'package:flutter/services.dart' show MethodCall;
 /// FakeSignInBackend fakeSignInBackend;
 ///
 /// setUp(() {
-///   googleSignIn = new GoogleSignIn();
-///   fakeSignInBackend = new FakeSignInBackend();
-///   fakeSignInBackend.user = new FakeUser(
+///   googleSignIn = GoogleSignIn();
+///   fakeSignInBackend = FakeSignInBackend();
+///   fakeSignInBackend.user = FakeUser(
 ///     id: 123,
 ///     email: 'jdoe@example.org',
 ///   );

packages/image_picker/README.md

@@ -30,7 +30,7 @@ import 'package:image_picker/image_picker.dart';
 
 class MyHomePage extends StatefulWidget {
   @override
-  _MyHomePageState createState() => new _MyHomePageState();
+  _MyHomePageState createState() => _MyHomePageState();
 }
 
 class _MyHomePageState extends State<MyHomePage> {
@@ -46,19 +46,19 @@ class _MyHomePageState extends State<MyHomePage> {
 
   @override
   Widget build(BuildContext context) {
-    return new Scaffold(
-      appBar: new AppBar(
-        title: new Text('Image Picker Example'),
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('Image Picker Example'),
       ),
-      body: new Center(
+      body: Center(
         child: _image == null
-            ? new Text('No image selected.')
-            : new Image.file(_image),
+            ? Text('No image selected.')
+            : Image.file(_image),
       ),
-      floatingActionButton: new FloatingActionButton(
+      floatingActionButton: FloatingActionButton(
         onPressed: getImage,
         tooltip: 'Pick Image',
-        child: new Icon(Icons.add_a_photo),
+        child: Icon(Icons.add_a_photo),
       ),
     );
   }

packages/local_auth/README.md

@@ -56,7 +56,7 @@ instructions will pop up to let the user set up fingerprint. If the user clicks
 Use the exported APIs to trigger local authentication with default dialogs:
 
 ```dart
-var localAuth = new LocalAuthentication();
+var localAuth = LocalAuthentication();
 bool didAuthenticate =
     await localAuth.authenticateWithBiometrics(
         localizedReason: 'Please authenticate to show account balance');

packages/quick_actions/README.md

@@ -29,8 +29,8 @@ Finally, manage the app's quick actions, for instance:
 
 ```dart
 quickActions.setShortcutItems(<ShortcutItem>[
-  new quickActions.ShortcutItem(type: 'action_main', localizedTitle: 'Main view', icon: 'icon_main'),
-  new quickActions.ShortcutItem(type: 'action_help', localizedTitle: 'Help', icon: 'icon_help')
+  quickActions.ShortcutItem(type: 'action_main', localizedTitle: 'Main view', icon: 'icon_main'),
+  quickActions.ShortcutItem(type: 'action_help', localizedTitle: 'Help', icon: 'icon_help')
 ]);
 ```