Fix outdated links across a number of markdown files

CONTRIBUTING.md

@@ -3,7 +3,7 @@
 
 [![Build Status](https://api.cirrus-ci.com/github/flutter/plugins.svg)](https://cirrus-ci.com/github/flutter/plugins/master)
 
-_See also: [Flutter's code of conduct](https://flutter.io/design-principles/#code-of-conduct)_
+_See also: [Flutter's code of conduct](https://github.com/flutter/flutter/blob/master/CODE_OF_CONDUCT.md)_
 
 ## Things you will need
 
@@ -131,17 +131,16 @@ pub global run flutter_plugin_tools xctest --target RunnerUITests --skip <plugin
 We gladly accept contributions via GitHub pull requests.
 
 Please peruse our
-[style guide](https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo) and
-[design principles](https://flutter.io/design-principles/) before
-working on anything non-trivial. These guidelines are intended to
+[style guide](https://github.com/flutter/flutter/wiki/Style-guide-for-Flutter-repo)
+before working on anything non-trivial. These guidelines are intended to
 keep the code consistent and avoid common pitfalls.
 
 To start working on a patch:
 
  * `git fetch upstream`
  * `git checkout upstream/master -b <name_of_your_branch>`
  * Hack away.
- * Verify changes with [flutter_plugin_tools](https://pub.dartlang.org/packages/flutter_plugin_tools)
+ * Verify changes with [flutter_plugin_tools](https://pub.dev/packages/flutter_plugin_tools)
 ```
 pub global activate flutter_plugin_tools
 pub global run flutter_plugin_tools format --plugins plugin_name

packages/android_alarm_manager/README.md

@@ -1,6 +1,6 @@
 # android_alarm_manager
 
-[![pub package](https://img.shields.io/pub/v/android_alarm_manager.svg)](https://pub.dartlang.org/packages/android_alarm_manager)
+[![pub package](https://img.shields.io/pub/v/android_alarm_manager.svg)](https://pub.dev/packages/android_alarm_manager)
 
 A Flutter plugin for accessing the Android AlarmManager service, and running
 Dart code in the background when alarms fire.
@@ -121,6 +121,6 @@ register plugins. This can be resolved by running `flutter upgrade` to upgrade
 to the latest Flutter version.**
 
 For help getting started with Flutter, view our online
-[documentation](http://flutter.io/).
+[documentation](https://flutter.dev/).
 
-For help on editing plugin code, view the [documentation](https://flutter.io/platform-plugins/#edit-code).
+For help on editing plugin code, view the [documentation](https://flutter.dev/docs/development/packages-and-plugins/developing-packages#plugin).

packages/android_intent/README.md

@@ -53,20 +53,20 @@ if (platform.isAndroid) {
 Feel free to add support for additional Android intents.
 
 The Dart values supported for the arguments parameter, and their corresponding
-Android values, are listed [here](https://flutter.io/platform-channels/#codec).
+Android values, are listed [here](https://flutter.dev/docs/development/platform-integration/platform-channels#codec).
 On the Android side, the arguments are used to populate an Android `Bundle`
 instance. This process currently restricts the use of lists to homogeneous lists
 of integers or strings.
 
 > Note that a similar method does not currently exist for iOS. Instead, the
-[url_launcher](https://pub.dartlang.org/packages/url_launcher) plugin
+[url_launcher](https://pub.dev/packages/url_launcher) plugin
 can be used for deep linking. Url launcher can also be used for creating
 ACTION_VIEW intents for Android, however this intent plugin also allows
 clients to set extra parameters for the intent.
 
 ## Getting Started
 
 For help getting started with Flutter, view our online
-[documentation](http://flutter.io/).
+[documentation](https://flutter.dev/).
 
-For help on editing plugin code, view the [documentation](https://flutter.io/platform-plugins/#edit-code).
+For help on editing plugin code, view the [documentation](https://flutter.dev/docs/development/packages-and-plugins/developing-packages#plugin).

packages/battery/battery/README.md

@@ -1,11 +1,11 @@
 # Battery
 
-[![pub package](https://img.shields.io/pub/v/battery.svg)](https://pub.dartlang.org/packages/battery)
+[![pub package](https://img.shields.io/pub/v/battery.svg)](https://pub.dev/packages/battery)
 
 A Flutter plugin to access various information about the battery of the device the app is running on.
 
 ## Usage
-To use this plugin, add `battery` as a [dependency in your pubspec.yaml file](https://flutter.io/platform-plugins/).
+To use this plugin, add `battery` as a [dependency in your pubspec.yaml file](https://flutter.dev/docs/development/platform-integration/platform-channels).
 
 ### Example
 

packages/camera/camera/README.md

@@ -1,6 +1,6 @@
 # Camera Plugin
 
-[![pub package](https://img.shields.io/pub/v/camera.svg)](https://pub.dartlang.org/packages/camera)
+[![pub package](https://img.shields.io/pub/v/camera.svg)](https://pub.dev/packages/camera)
 
 A Flutter plugin for iOS and Android allowing access to the device cameras.
 
@@ -15,7 +15,7 @@ A Flutter plugin for iOS and Android allowing access to the device cameras.
 
 ## Installation
 
-First, add `camera` as a [dependency in your pubspec.yaml file](https://flutter.io/using-packages/).
+First, add `camera` as a [dependency in your pubspec.yaml file](https://flutter.dev/using-packages/).
 
 ### iOS
 

packages/camera/camera/lib/camera.dart

@@ -388,7 +388,7 @@ class CameraController extends ValueNotifier<CameraValue> {
   /// Captures an image and saves it to [path].
   ///
   /// A path can for example be obtained using
-  /// [path_provider](https://pub.dartlang.org/packages/path_provider).
+  /// [path_provider](https://pub.dev/packages/path_provider).
   ///
   /// If a file already exists at the provided path an error will be thrown.
   /// The file can be read as this function returns.
@@ -507,7 +507,7 @@ class CameraController extends ValueNotifier<CameraValue> {
   /// Start a video recording and save the file to [path].
   ///
   /// A path can for example be obtained using
-  /// [path_provider](https://pub.dartlang.org/packages/path_provider).
+  /// [path_provider](https://pub.dev/packages/path_provider).
   ///
   /// The file is written on the flight as the video is being recorded.
   /// If a file already exists at the provided path an error will be thrown.

packages/connectivity/connectivity/README.md

@@ -55,6 +55,6 @@ Note that connectivity changes are no longer communicated to Android apps in the
 ## Getting Started
 
 For help getting started with Flutter, view our online
-[documentation](http://flutter.io/).
+[documentation](https://flutter.dev/).
 
-For help on editing plugin code, view the [documentation](https://flutter.io/platform-plugins/#edit-code).
+For help on editing plugin code, view the [documentation](https://flutter.dev/docs/development/packages-and-plugins/developing-packages#plugin).

packages/cross_file/README.md

@@ -24,7 +24,7 @@ final fileContent = await file.readAsString();
 print('Content of the file: ${fileContent}');  // e.g. "Moto G (4)"
 ```
 
-You will find links to the API docs on the [pub page](https://pub.dartlang.org/packages/cross_file).
+You will find links to the API docs on the [pub page](https://pub.dev/packages/cross_file).
 
 ## Getting Started
 

packages/device_info/device_info/README.md

@@ -21,11 +21,11 @@ IosDeviceInfo iosInfo = await deviceInfo.iosInfo;
 print('Running on ${iosInfo.utsname.machine}');  // e.g. "iPod7,1"
 ```
 
-You will find links to the API docs on the [pub page](https://pub.dartlang.org/packages/device_info).
+You will find links to the API docs on the [pub page](https://pub.dev/packages/device_info).
 
 ## Getting Started
 
 For help getting started with Flutter, view our online
-[documentation](http://flutter.io/).
+[documentation](https://flutter.dev/).
 
-For help on editing plugin code, view the [documentation](https://flutter.io/platform-plugins/#edit-code).
+For help on editing plugin code, view the [documentation](https://flutter.dev/docs/development/packages-and-plugins/developing-packages#plugin).

packages/flutter_plugin_android_lifecycle/README.md

@@ -1,6 +1,6 @@
 # Flutter Android Lifecycle Plugin
 
-[![pub package](https://img.shields.io/pub/v/flutter_plugin_android_lifecycle.svg)](https://pub.dartlang.org/packages/flutter_plugin_android_lifecycle)
+[![pub package](https://img.shields.io/pub/v/flutter_plugin_android_lifecycle.svg)](https://pub.dev/packages/flutter_plugin_android_lifecycle)
 
 A Flutter plugin for Android to allow other Flutter plugins to access  Android `Lifecycle` objects
 in the plugin's binding.
@@ -11,7 +11,7 @@ major version of the Android `Lifecycle` API they expect.
 
 ## Installation
 
-Add `flutter_plugin_android_lifecycle` as a [dependency in your pubspec.yaml file](https://flutter.io/using-packages/).
+Add `flutter_plugin_android_lifecycle` as a [dependency in your pubspec.yaml file](https://flutter.dev/using-packages/).
 
 ## Example
 

packages/google_maps_flutter/google_maps_flutter/README.md

@@ -1,12 +1,12 @@
 # Google Maps for Flutter
 
-[![pub package](https://img.shields.io/pub/v/google_maps_flutter.svg)](https://pub.dartlang.org/packages/google_maps_flutter)
+[![pub package](https://img.shields.io/pub/v/google_maps_flutter.svg)](https://pub.dev/packages/google_maps_flutter)
 
 A Flutter plugin that provides a [Google Maps](https://developers.google.com/maps/) widget.
 
 ## Usage
 
-To use this plugin, add `google_maps_flutter` as a [dependency in your pubspec.yaml file](https://flutter.io/platform-plugins/).
+To use this plugin, add `google_maps_flutter` as a [dependency in your pubspec.yaml file](https://flutter.dev/docs/development/platform-integration/platform-channels).
 
 ## Getting Started
 

packages/google_sign_in/extension_google_sign_in_as_googleapis_auth/example/README.md

@@ -5,4 +5,4 @@ Demonstrates how to use the google_sign_in plugin with the `googleapis` package.
 ## Getting Started
 
 For help getting started with Flutter, view our online
-[documentation](http://flutter.io/).
+[documentation](https://flutter.dev/).

packages/google_sign_in/google_sign_in/README.md

@@ -1,6 +1,6 @@
 # google_sign_in
 
-[![pub package](https://img.shields.io/pub/v/google_sign_in.svg)](https://pub.dartlang.org/packages/google_sign_in)
+[![pub package](https://img.shields.io/pub/v/google_sign_in.svg)](https://pub.dev/packages/google_sign_in)
 
 A Flutter plugin for [Google Sign In](https://developers.google.com/identity/).
 
@@ -63,7 +63,7 @@ plugin could be an option.
 ## Usage
 
 ### Import the package
-To use this plugin, follow the [plugin installation instructions](https://pub.dartlang.org/packages/google_sign_in#pub-pkg-tab-installing).
+To use this plugin, follow the [plugin installation instructions](https://pub.dev/packages/google_sign_in#pub-pkg-tab-installing).
 
 ### Use the plugin
 Add the following import to your Dart code:

packages/image_picker/image_picker/README.md

@@ -1,13 +1,13 @@
 # Image Picker plugin for Flutter
 
-[![pub package](https://img.shields.io/pub/v/image_picker.svg)](https://pub.dartlang.org/packages/image_picker)
+[![pub package](https://img.shields.io/pub/v/image_picker.svg)](https://pub.dev/packages/image_picker)
 
 A Flutter plugin for iOS and Android for picking images from the image library,
 and taking new pictures with the camera.
 
 ## Installation
 
-First, add `image_picker` as a [dependency in your pubspec.yaml file](https://flutter.io/platform-plugins/).
+First, add `image_picker` as a [dependency in your pubspec.yaml file](https://flutter.dev/docs/development/platform-integration/platform-channels).
 
 ### iOS
 

packages/in_app_purchase/README.md

@@ -181,7 +181,7 @@ WARNING! Failure to call `InAppPurchaseConnection.completePurchase` and get a su
 ## Development
 
 This plugin uses
-[json_serializable](https://pub.dartlang.org/packages/json_serializable) for the
+[json_serializable](https://pub.dev/packages/json_serializable) for the
 many data structs passed between the underlying platform layers and Dart. After
 editing any of the serialized data structs, rebuild the serializers by running
 `flutter packages pub run build_runner build --delete-conflicting-outputs`.

packages/local_auth/README.md

@@ -170,6 +170,6 @@ app resumes.
 ## Getting Started
 
 For help getting started with Flutter, view our online
-[documentation](http://flutter.io/).
+[documentation](https://flutter.dev/).
 
-For help on editing plugin code, view the [documentation](https://flutter.io/platform-plugins/#edit-code).
+For help on editing plugin code, view the [documentation](https://flutter.dev/docs/development/packages-and-plugins/developing-packages#plugin).

packages/path_provider/path_provider/README.md

@@ -1,13 +1,13 @@
 # path_provider
 
-[![pub package](https://img.shields.io/pub/v/path_provider.svg)](https://pub.dartlang.org/packages/path_provider)
+[![pub package](https://img.shields.io/pub/v/path_provider.svg)](https://pub.dev/packages/path_provider)
 
 A Flutter plugin for finding commonly used locations on the filesystem. Supports iOS, Android, Linux and MacOS.
 Not all methods are supported on all platforms.
 
 ## Usage
 
-To use this plugin, add `path_provider` as a [dependency in your pubspec.yaml file](https://flutter.io/platform-plugins/).
+To use this plugin, add `path_provider` as a [dependency in your pubspec.yaml file](https://flutter.dev/docs/development/platform-integration/platform-channels).
 
 ### Example
 

packages/quick_actions/README.md

@@ -43,6 +43,6 @@ quick action.
 ## Getting Started
 
 For help getting started with Flutter, view our online
-[documentation](http://flutter.io/).
+[documentation](https://flutter.dev/).
 
-For help on editing plugin code, view the [documentation](https://flutter.io/platform-plugins/#edit-code).
+For help on editing plugin code, view the [documentation](https://flutter.dev/docs/development/packages-and-plugins/developing-packages#plugin).

packages/sensors/README.md

@@ -13,7 +13,7 @@ A Flutter plugin to access the accelerometer and gyroscope sensors.
 ## Usage
 
 To use this plugin, add `sensors` as a [dependency in your pubspec.yaml
-file](https://flutter.io/platform-plugins/).
+file](https://flutter.dev/docs/development/platform-integration/platform-channels).
 
 This will expose three classes of sensor events, through three different
 streams.

packages/share/README.md

@@ -1,6 +1,6 @@
 # Share plugin
 
-[![pub package](https://img.shields.io/pub/v/share.svg)](https://pub.dartlang.org/packages/share)
+[![pub package](https://img.shields.io/pub/v/share.svg)](https://pub.dev/packages/share)
 
 A Flutter plugin to share content from your Flutter app via the platform's
 share dialog.
@@ -17,7 +17,7 @@ For more details see: https://github.com/flutter/flutter/wiki/Package-migration-
 
 ## Usage
 
-To use this plugin, add `share` as a [dependency in your pubspec.yaml file](https://flutter.io/platform-plugins/).
+To use this plugin, add `share` as a [dependency in your pubspec.yaml file](https://flutter.dev/docs/development/platform-integration/platform-channels).
 
 ## Example
 

packages/shared_preferences/shared_preferences/README.md

@@ -1,6 +1,6 @@
 # Shared preferences plugin
 
-[![pub package](https://img.shields.io/pub/v/shared_preferences.svg)](https://pub.dartlang.org/packages/shared_preferences)
+[![pub package](https://img.shields.io/pub/v/shared_preferences.svg)](https://pub.dev/packages/shared_preferences)
 
 Wraps platform-specific persistent storage for simple data
 (NSUserDefaults on iOS and macOS, SharedPreferences on Android, etc.). Data may be persisted to disk asynchronously,
@@ -16,7 +16,7 @@ Please use `shared_preferences: '>=0.5.y+x <2.0.0'` as your dependency constrain
 For more details see: https://github.com/flutter/flutter/wiki/Package-migration-to-1.0.0
 
 ## Usage
-To use this plugin, add `shared_preferences` as a [dependency in your pubspec.yaml file](https://flutter.io/platform-plugins/).
+To use this plugin, add `shared_preferences` as a [dependency in your pubspec.yaml file](https://flutter.dev/docs/development/platform-integration/platform-channels).
 
 ### Example
 

packages/url_launcher/url_launcher/README.md

@@ -1,6 +1,6 @@
 # url_launcher
 
-[![pub package](https://img.shields.io/pub/v/url_launcher.svg)](https://pub.dartlang.org/packages/url_launcher)
+[![pub package](https://img.shields.io/pub/v/url_launcher.svg)](https://pub.dev/packages/url_launcher)
 
 A Flutter plugin for launching a URL in the mobile platform. Supports
 iOS, Android, web, Windows, macOS, and Linux.
@@ -38,7 +38,7 @@ _launchURL() async {
 
 ## Supported URL schemes
 
-The [`launch`](https://www.dartdocs.org/documentation/url_launcher/latest/url_launcher/launch.html) method
+The [`launch`](https://pub.dev/documentation/url_launcher/latest/url_launcher/launch.html) method
 takes a string argument containing a URL. This URL
 can be formatted using a number of different URL schemes. The supported
 URL schemes depend on the underlying platform and installed apps.
@@ -83,7 +83,7 @@ launching a URL using the `sms` scheme, or a device may not have an email app
 and thus no support for launching a URL using the `email` scheme.
 
 We recommend checking which URL schemes are supported using the
-[`canLaunch`](https://www.dartdocs.org/documentation/url_launcher/latest/url_launcher/canLaunch.html)
+[`canLaunch`](https://pub.dev/documentation/url_launcher/latest/url_launcher/canLaunch.html)
 method prior to calling `launch`. If the `canLaunch` method returns false, as a
 best practice we suggest adjusting the application UI so that the unsupported
 URL is never triggered; for example, if the `email` scheme is not supported, a

packages/url_launcher/url_launcher_linux/example/README.md

@@ -5,4 +5,4 @@ Demonstrates how to use the url_launcher plugin.
 ## Getting Started
 
 For help getting started with Flutter, view our online
-[documentation](http://flutter.io/).
+[documentation](https://flutter.dev/).

packages/video_player/video_player/README.md

@@ -1,6 +1,6 @@
 # Video Player plugin for Flutter
 
-[![pub package](https://img.shields.io/pub/v/video_player.svg)](https://pub.dartlang.org/packages/video_player)
+[![pub package](https://img.shields.io/pub/v/video_player.svg)](https://pub.dev/packages/video_player)
 
 A Flutter plugin for iOS, Android and Web for playing back video on a Widget surface.
 
@@ -12,7 +12,7 @@ A Flutter plugin for iOS, Android and Web for playing back video on a Widget sur
 
 ## Installation
 
-First, add `video_player` as a [dependency in your pubspec.yaml file](https://flutter.io/using-packages/).
+First, add `video_player` as a [dependency in your pubspec.yaml file](https://flutter.dev/using-packages/).
 
 ### iOS
 

packages/webview_flutter/README.md

@@ -1,14 +1,14 @@
 # WebView for Flutter
 
-[![pub package](https://img.shields.io/pub/v/webview_flutter.svg)](https://pub.dartlang.org/packages/webview_flutter)
+[![pub package](https://img.shields.io/pub/v/webview_flutter.svg)](https://pub.dev/packages/webview_flutter)
 
 A Flutter plugin that provides a WebView widget.
 
 On iOS the WebView widget is backed by a [WKWebView](https://developer.apple.com/documentation/webkit/wkwebview);
 On Android the WebView widget is backed by a [WebView](https://developer.android.com/reference/android/webkit/WebView).
 
 ## Usage
-Add `webview_flutter` as a [dependency in your pubspec.yaml file](https://flutter.io/platform-plugins/).
+Add `webview_flutter` as a [dependency in your pubspec.yaml file](https://flutter.dev/docs/development/platform-integration/platform-channels).
 
 You can now include a WebView widget in your widget tree. See the
 [WebView](https://pub.dev/documentation/webview_flutter/latest/webview_flutter/WebView-class.html)