diff --git a/.gitignore b/.gitignore
index 75f33e5b02..cf476b11ba 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,7 +41,6 @@ unlinked.ds
 unlinked_spec.ds
 
 # Android related
-**/android/**/GeneratedPluginRegistrant.java
 **/android/**/gradle-wrapper.jar
 **/android/.gradle
 **/android/captures/
@@ -60,8 +59,6 @@ unlinked_spec.ds
 **/ios/**/.tags*
 **/ios/**/.vagrant/
 **/ios/**/DerivedData/
-**/ios/**/GeneratedPluginRegistrant.h
-**/ios/**/GeneratedPluginRegistrant.m
 **/ios/**/Icon?
 **/ios/**/Pods/
 **/ios/**/profile
diff --git a/dev/bots/test.dart b/dev/bots/test.dart
index c5c5cf7e43..9aafdcd29e 100644
--- a/dev/bots/test.dart
+++ b/dev/bots/test.dart
@@ -87,6 +87,7 @@ Future<Null> _verifyInternationalizations() async {
 }
 
 Future<Null> _analyzeRepo() async {
+  await _verifyGeneratedPluginRegistrants(flutterRoot);
   await _verifyNoBadImports(flutterRoot);
   await _verifyInternationalizations();
 
@@ -477,3 +478,63 @@ void _printProgress(String action, String workingDir, String command) {
   const String arrow = '⏩';
   print('$arrow $action: cd $cyan$workingDir$reset; $yellow$command$reset');
 }
+
+Future<Null> _verifyGeneratedPluginRegistrants(String flutterRoot) async {
+  final Directory flutterRootDir = new Directory(flutterRoot);
+
+  final Map<String, List<File>> packageToRegistrants = <String, List<File>>{};
+
+  for (FileSystemEntity entity in flutterRootDir.listSync(recursive: true)) {
+    if (entity is! File)
+      continue;
+    if (_isGeneratedPluginRegistrant(entity)) {
+      final String package = _getPackageFor(entity, flutterRootDir);
+      final List<File> registrants = packageToRegistrants.putIfAbsent(package, () => <File>[]);
+      registrants.add(entity);
+    }
+  }
+
+  final Set<String> outOfDate = new Set<String>();
+
+  for (String package in packageToRegistrants.keys) {
+    final Map<File, String> fileToContent = new Map<File, String>.fromIterable(packageToRegistrants[package],
+      key: (File f) => f,
+      value: (File f) => f.readAsStringSync(),
+    );
+    await _runCommand(flutter, <String>['inject-plugins'],
+      workingDirectory: package,
+      printOutput: false,
+    );
+    for (File registrant in fileToContent.keys) {
+      if (registrant.readAsStringSync() != fileToContent[registrant]) {
+        outOfDate.add(registrant.path);
+      }
+    }
+  }
+
+  if (outOfDate.isNotEmpty) {
+    print('$red━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━$reset');
+    print('${bold}The following GeneratedPluginRegistrants are out of date:$reset');
+    for (String registrant in outOfDate) {
+      print(' - $registrant');
+    }
+    print('$red━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━$reset');
+    exit(1);
+  }
+}
+
+String _getPackageFor(File entity, Directory flutterRootDir) {
+  for (Directory dir = entity.parent; dir != flutterRootDir; dir = dir.parent) {
+    if (new File(path.join(dir.path, 'pubspec.yaml')).existsSync()) {
+      return dir.path;
+    }
+  }
+  throw new ArgumentError('$entity is not within a dart package.');
+}
+
+bool _isGeneratedPluginRegistrant(File file) {
+  final String filename = path.basename(file.path);
+  return filename == 'GeneratedPluginRegistrant.java' ||
+      filename == 'GeneratedPluginRegistrant.h' ||
+      filename == 'GeneratedPluginRegistrant.m';
+}
diff --git a/dev/integration_tests/channels/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java b/dev/integration_tests/channels/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
index e07931dc42..d007606a44 100644
--- a/dev/integration_tests/channels/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
+++ b/dev/integration_tests/channels/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
@@ -7,5 +7,17 @@ import io.flutter.plugin.common.PluginRegistry;
  */
 public final class GeneratedPluginRegistrant {
   public static void registerWith(PluginRegistry registry) {
+    if (alreadyRegisteredWith(registry)) {
+      return;
+    }
+  }
+
+  private static boolean alreadyRegisteredWith(PluginRegistry registry) {
+    final String key = GeneratedPluginRegistrant.class.getCanonicalName();
+    if (registry.hasPlugin(key)) {
+      return true;
+    }
+    registry.registrarFor(key);
+    return false;
   }
 }
diff --git a/dev/integration_tests/ui/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java b/dev/integration_tests/ui/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
index e07931dc42..d007606a44 100644
--- a/dev/integration_tests/ui/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
+++ b/dev/integration_tests/ui/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
@@ -7,5 +7,17 @@ import io.flutter.plugin.common.PluginRegistry;
  */
 public final class GeneratedPluginRegistrant {
   public static void registerWith(PluginRegistry registry) {
+    if (alreadyRegisteredWith(registry)) {
+      return;
+    }
+  }
+
+  private static boolean alreadyRegisteredWith(PluginRegistry registry) {
+    final String key = GeneratedPluginRegistrant.class.getCanonicalName();
+    if (registry.hasPlugin(key)) {
+      return true;
+    }
+    registry.registrarFor(key);
+    return false;
   }
 }
diff --git a/dev/manual_tests/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java b/dev/manual_tests/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
index e07931dc42..d007606a44 100644
--- a/dev/manual_tests/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
+++ b/dev/manual_tests/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
@@ -7,5 +7,17 @@ import io.flutter.plugin.common.PluginRegistry;
  */
 public final class GeneratedPluginRegistrant {
   public static void registerWith(PluginRegistry registry) {
+    if (alreadyRegisteredWith(registry)) {
+      return;
+    }
+  }
+
+  private static boolean alreadyRegisteredWith(PluginRegistry registry) {
+    final String key = GeneratedPluginRegistrant.class.getCanonicalName();
+    if (registry.hasPlugin(key)) {
+      return true;
+    }
+    registry.registrarFor(key);
+    return false;
   }
 }
diff --git a/examples/flutter_gallery/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java b/examples/flutter_gallery/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
index cae2b1f93d..19a021fdfa 100644
--- a/examples/flutter_gallery/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
+++ b/examples/flutter_gallery/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
@@ -11,9 +11,21 @@ import io.flutter.videoplayer.VideoPlayerPlugin;
  */
 public final class GeneratedPluginRegistrant {
   public static void registerWith(PluginRegistry registry) {
+    if (alreadyRegisteredWith(registry)) {
+      return;
+    }
     ConnectivityPlugin.registerWith(registry.registrarFor("io.flutter.plugins.connectivity.ConnectivityPlugin"));
     DeviceInfoPlugin.registerWith(registry.registrarFor("io.flutter.plugins.deviceinfo.DeviceInfoPlugin"));
     UrlLauncherPlugin.registerWith(registry.registrarFor("io.flutter.plugins.urllauncher.UrlLauncherPlugin"));
     VideoPlayerPlugin.registerWith(registry.registrarFor("io.flutter.videoplayer.VideoPlayerPlugin"));
   }
+
+  private static boolean alreadyRegisteredWith(PluginRegistry registry) {
+    final String key = GeneratedPluginRegistrant.class.getCanonicalName();
+    if (registry.hasPlugin(key)) {
+      return true;
+    }
+    registry.registrarFor(key);
+    return false;
+  }
 }
diff --git a/examples/hello_world/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java b/examples/hello_world/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
index e07931dc42..d007606a44 100644
--- a/examples/hello_world/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
+++ b/examples/hello_world/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
@@ -7,5 +7,17 @@ import io.flutter.plugin.common.PluginRegistry;
  */
 public final class GeneratedPluginRegistrant {
   public static void registerWith(PluginRegistry registry) {
+    if (alreadyRegisteredWith(registry)) {
+      return;
+    }
+  }
+
+  private static boolean alreadyRegisteredWith(PluginRegistry registry) {
+    final String key = GeneratedPluginRegistrant.class.getCanonicalName();
+    if (registry.hasPlugin(key)) {
+      return true;
+    }
+    registry.registrarFor(key);
+    return false;
   }
 }
diff --git a/examples/layers/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java b/examples/layers/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
index e07931dc42..d007606a44 100644
--- a/examples/layers/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
+++ b/examples/layers/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
@@ -7,5 +7,17 @@ import io.flutter.plugin.common.PluginRegistry;
  */
 public final class GeneratedPluginRegistrant {
   public static void registerWith(PluginRegistry registry) {
+    if (alreadyRegisteredWith(registry)) {
+      return;
+    }
+  }
+
+  private static boolean alreadyRegisteredWith(PluginRegistry registry) {
+    final String key = GeneratedPluginRegistrant.class.getCanonicalName();
+    if (registry.hasPlugin(key)) {
+      return true;
+    }
+    registry.registrarFor(key);
+    return false;
   }
 }
diff --git a/examples/platform_channel/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java b/examples/platform_channel/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
index e07931dc42..d007606a44 100644
--- a/examples/platform_channel/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
+++ b/examples/platform_channel/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
@@ -7,5 +7,17 @@ import io.flutter.plugin.common.PluginRegistry;
  */
 public final class GeneratedPluginRegistrant {
   public static void registerWith(PluginRegistry registry) {
+    if (alreadyRegisteredWith(registry)) {
+      return;
+    }
+  }
+
+  private static boolean alreadyRegisteredWith(PluginRegistry registry) {
+    final String key = GeneratedPluginRegistrant.class.getCanonicalName();
+    if (registry.hasPlugin(key)) {
+      return true;
+    }
+    registry.registrarFor(key);
+    return false;
   }
 }
diff --git a/examples/platform_view/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java b/examples/platform_view/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
new file mode 100644
index 0000000000..d007606a44
--- /dev/null
+++ b/examples/platform_view/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
@@ -0,0 +1,23 @@
+package io.flutter.plugins;
+
+import io.flutter.plugin.common.PluginRegistry;
+
+/**
+ * Generated file. Do not edit.
+ */
+public final class GeneratedPluginRegistrant {
+  public static void registerWith(PluginRegistry registry) {
+    if (alreadyRegisteredWith(registry)) {
+      return;
+    }
+  }
+
+  private static boolean alreadyRegisteredWith(PluginRegistry registry) {
+    final String key = GeneratedPluginRegistrant.class.getCanonicalName();
+    if (registry.hasPlugin(key)) {
+      return true;
+    }
+    registry.registrarFor(key);
+    return false;
+  }
+}
diff --git a/examples/stocks/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java b/examples/stocks/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
index e07931dc42..d007606a44 100644
--- a/examples/stocks/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
+++ b/examples/stocks/android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java
@@ -7,5 +7,17 @@ import io.flutter.plugin.common.PluginRegistry;
  */
 public final class GeneratedPluginRegistrant {
   public static void registerWith(PluginRegistry registry) {
+    if (alreadyRegisteredWith(registry)) {
+      return;
+    }
+  }
+
+  private static boolean alreadyRegisteredWith(PluginRegistry registry) {
+    final String key = GeneratedPluginRegistrant.class.getCanonicalName();
+    if (registry.hasPlugin(key)) {
+      return true;
+    }
+    registry.registrarFor(key);
+    return false;
   }
 }
diff --git a/packages/flutter_tools/lib/executable.dart b/packages/flutter_tools/lib/executable.dart
index 43ca13b525..d20863c46c 100644
--- a/packages/flutter_tools/lib/executable.dart
+++ b/packages/flutter_tools/lib/executable.dart
@@ -18,6 +18,7 @@ import 'src/commands/drive.dart';
 import 'src/commands/format.dart';
 import 'src/commands/fuchsia_reload.dart';
 import 'src/commands/ide_config.dart';
+import 'src/commands/inject_plugins.dart';
 import 'src/commands/install.dart';
 import 'src/commands/logs.dart';
 import 'src/commands/packages.dart';
@@ -45,6 +46,7 @@ Future<Null> main(List<String> args) async {
     new BuildCommand(verboseHelp: verboseHelp),
     new ChannelCommand(),
     new CleanCommand(),
+    new InjectPluginsCommand(hidden: !verboseHelp),
     new ConfigCommand(verboseHelp: verboseHelp),
     new CreateCommand(),
     new DaemonCommand(hidden: !verboseHelp),
diff --git a/packages/flutter_tools/lib/src/commands/inject_plugins.dart b/packages/flutter_tools/lib/src/commands/inject_plugins.dart
new file mode 100644
index 0000000000..bf53cb5164
--- /dev/null
+++ b/packages/flutter_tools/lib/src/commands/inject_plugins.dart
@@ -0,0 +1,34 @@
+// Copyright 2017 The Chromium Authors. 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:async';
+
+import '../globals.dart';
+import '../plugins.dart';
+import '../runner/flutter_command.dart';
+
+class InjectPluginsCommand extends FlutterCommand {
+  InjectPluginsCommand({ this.hidden: false }) {
+    requiresPubspecYaml();
+  }
+
+  @override
+  final String name = 'inject-plugins';
+
+  @override
+  final String description = 'Re-generates the GeneratedPluginRegistrants.';
+
+  @override
+  final bool hidden;
+
+  @override
+  Future<Null> runCommand() async {
+    final bool result = injectPlugins();
+    if (result) {
+      printStatus('GeneratedPluginRegistrants successfully written.');
+    } else {
+      printStatus('This project does not use plugins, no GeneratedPluginRegistrants have been created.');
+    }
+  }
+}