Add Flutter GCM package and extend fitness app to use GCM.

examples/fitness/BUILD.gn

@@ -9,10 +9,29 @@ sky_app("fitness") {
   manifest = "flutter.yaml"
 
   if (is_android) {
+    import("//build/config/android/config.gni")
+    import("//build/config/android/rules.gni")
+
     apk_name = "Fitness"
 
+    android_library("java") {
+      java_files = [
+        "apk/src/org/domokit/fitness/FitnessApplication.java",
+      ]
+
+      deps = [
+        "//base:base_java",
+        "//mojo/public/java:bindings",
+        "//mojo/public/java:system",
+        "//sky/services/gcm:gcm_lib",
+        "//sky/services/gcm:interfaces_java",
+        "//sky/shell:java",
+      ]
+    }
+
     deps = [
       "//examples/fitness/apk:resources",
+      ":java",
     ]
   } else if (is_mac) {
     info_plist = "mac/Info.plist"

examples/fitness/apk/AndroidManifest.xml

@@ -8,7 +8,17 @@
     <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="21" />
     <uses-permission android:name="android.permission.INTERNET" />
 
-    <application android:icon="@mipmap/ic_launcher" android:label="Fitness" android:name="org.domokit.sky.shell.SkyApplication">
+    <!-- for GCM -->
+    <uses-permission android:name="android.permission.WAKE_LOCK" />
+    <uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
+    <!-- Supposedly this permission prevents other apps from receiving our
+    messages, but it doesn't seem to have any effect. -->
+    <permission android:name="org.domokit.sky.shell.permission.C2D_MESSAGE"
+        android:protectionLevel="signature" />
+    <uses-permission android:name="org.domokit.sky.shell.permission.C2D_MESSAGE" />
+    <!-- end for GCM -->
+
+    <application android:icon="@mipmap/ic_launcher" android:label="Fitness" android:name="org.domokit.fitness.FitnessApplication">
         <activity android:configChanges="orientation|keyboardHidden|keyboard|screenSize" android:hardwareAccelerated="true" android:launchMode="singleTask" android:name="org.domokit.sky.shell.SkyActivity" android:theme="@android:style/Theme.Black.NoTitleBar">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
@@ -19,5 +29,34 @@
             android:name="org.domokit.sky.shell.UpdateService"
             android:exported="false"
             android:process=":remote"/>
+
+        <!-- for GCM -->
+        <receiver
+            android:name="com.google.android.gms.gcm.GcmReceiver"
+            android:exported="true"
+            android:permission="com.google.android.c2dm.permission.SEND" >
+            <intent-filter>
+                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
+                <category android:name="org.domokit.sky.shell" />
+            </intent-filter>
+        </receiver>
+        <service
+            android:name="org.domokit.gcm.GcmListenerService"
+            android:exported="false" >
+            <intent-filter>
+                <action android:name="com.google.android.c2dm.intent.RECEIVE" />
+            </intent-filter>
+        </service>
+        <service
+            android:name="org.domokit.gcm.InstanceIDListenerService"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="com.google.android.gms.iid.InstanceID"/>
+            </intent-filter>
+        </service>
+        <service
+            android:name="org.domokit.gcm.RegistrationIntentService"
+            android:exported="false">
+        </service>
     </application>
  </manifest>

examples/fitness/apk/src/org/domokit/fitness/FitnessApplication.java

+// Copyright 2015 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.
+
+package org.domokit.fitness;
+
+import android.content.Context;
+
+import org.chromium.mojo.system.Core;
+import org.chromium.mojo.system.MessagePipeHandle;
+import org.chromium.mojom.gcm.GcmService;
+import org.domokit.gcm.RegistrationIntentService;
+import org.domokit.sky.shell.ServiceFactory;
+import org.domokit.sky.shell.ServiceRegistry;
+import org.domokit.sky.shell.SkyApplication;
+
+/**
+ * Sky implementation of {@link android.app.Application}, managing application-level global
+ * state and initializations.
+ */
+public class FitnessApplication extends SkyApplication {
+    /**
+      * Override this function to register more services.
+      */
+    protected void onServiceRegistryAvailable(ServiceRegistry registry) {
+        super.onServiceRegistryAvailable(registry);
+
+        registry.register(GcmService.MANAGER.getName(), new ServiceFactory() {
+            @Override
+            public void connectToService(Context context, Core core, MessagePipeHandle pipe) {
+                GcmService.MANAGER.bind(
+                    new RegistrationIntentService.MojoService(context), pipe);
+            }
+        });
+    }
+}

examples/fitness/lib/main.dart

@@ -7,6 +7,7 @@ library fitness;
 import 'package:playfair/playfair.dart' as playfair;
 import 'package:flutter/material.dart';
 import 'package:flutter/painting.dart';
+import 'package:gcm/gcm.dart' as gcm;
 
 import 'user_data.dart';
 import 'date_utils.dart';
@@ -161,6 +162,18 @@ class FitnessAppState extends State<FitnessApp> {
   }
 }
 
-void main() {
+initGcm() async {
+  // Register for GCM messages using the senderId provided in the
+  // google-services.json we received when registering our app.
+  String token;
+  token = await gcm.registerGcmService(
+      "858790231562", (String from, String message) {
+    print("onMessageReceived: $from; $message");
+    gcm.unsubscribeTopics(token, ["global"]);
+  });
+  gcm.subscribeTopics(token, ["global"]);
+}
+
+main() {
   runApp(new FitnessApp());
 }

examples/fitness/pubspec.yaml

@@ -5,3 +5,5 @@ dependencies:
     path: ../../packages/flutter
   playfair:
     path: ../../packages/playfair
+  gcm:
+    path: ../../packages/gcm

packages/flutter/pubspec.yaml

@@ -8,8 +8,8 @@ dependencies:
   collection: '>=1.1.3 <2.0.0'
   intl: '>=0.12.4+2 <0.13.0'
   material_design_icons: '>=0.0.3 <0.1.0'
-  sky_engine: 0.0.75
-  sky_services: 0.0.75
+  sky_engine: 0.0.77
+  sky_services: 0.0.77
   vector_math: '>=1.4.3 <2.0.0'
   quiver: '>=0.21.4 <0.22.0'
 

packages/gcm/.gitignore

+.DS_Store
+.idea
+.packages
+.pub/
+build/
+packages
+pubspec.lock

packages/gcm/lib/gcm.dart

+// Copyright 2015 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.
+
+/// Service exposed to Flutter apps that implements a subset of the GCM API.
+///
+/// This library will probably be moved into a separate package eventually.
+library gcm;
+
+export 'src/gcm.dart';

packages/gcm/lib/src/gcm.dart

+// Copyright 2015, the Flutter authors.  Please see the AUTHORS file
+// for details. 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 'package:flutter/services.dart';
+import 'package:sky_services/gcm/gcm.mojom.dart';
+
+GcmServiceProxy _initGcmService() {
+  GcmServiceProxy gcmService = new GcmServiceProxy.unbound();
+  shell.connectToService(null, gcmService);
+  return gcmService;
+}
+
+final GcmServiceProxy _gcmService = _initGcmService();
+
+typedef void GcmListenerCallback(String from, String message);
+class _GcmListenerImpl implements GcmListener {
+  _GcmListenerImpl(this.callback);
+
+  GcmListenerCallback callback;
+
+  void onMessageReceived(String from, String message) {
+    callback(from, message);
+  }
+}
+
+Future<String> registerGcmService(String senderId, GcmListenerCallback listenerCallback) async {
+  GcmListenerStub listener = new GcmListenerStub.unbound()
+    ..impl = new _GcmListenerImpl(listenerCallback);
+  GcmServiceRegisterResponseParams result =
+      await _gcmService.ptr.register(senderId, listener);
+  return result.token;
+}
+
+void subscribeTopics(String token, List<String> topics) {
+  _gcmService.ptr.subscribeTopics(token, topics);
+}
+
+void unsubscribeTopics(String token, List<String> topics) {
+  _gcmService.ptr.unsubscribeTopics(token, topics);
+}

packages/gcm/pubspec.yaml

+name: gcm
+description: Bindings for Google Cloud Messaging API
+version: 0.0.1
+author: Flutter Authors <flutter-dev@googlegroups.com>
+homepage: https://github.com/flutter/flutter/tree/master/packages/playfair
+
+dependencies:
+  flutter:
+    path: ../flutter
+
+dev_dependencies:
+  test: 0.12.6+1
+
+environment:
+  sdk: '>=1.12.0 <2.0.0'