Add the ability for Sky content to trigger Android intents

sky/examples/raw/launcher.dart

Index: sky/examples/raw/launcher.dart
diff --git a/sky/examples/raw/hello_world.dart b/sky/examples/raw/launcher.dart
similarity index 62%
copy from sky/examples/raw/hello_world.dart
copy to sky/examples/raw/launcher.dart
index 4264abf8990f0bee5c78ce2d5bad6f70456e9ee3..58341d184b1df9dd89a323f0fe5ac3ab460c972e 100644
--- a/sky/examples/raw/hello_world.dart
+++ b/sky/examples/raw/launcher.dart
@@ -5,6 +5,9 @@
 import "dart:math";
 import 'dart:sky';
 
+import 'package:sky/framework/shell.dart' as shell;
+import 'package:mojom/intents/intents.mojom.dart';
+
 Picture draw(int a, int r, int g, int b) {
   double width = view.width;
   double height = view.height;
@@ -13,7 +16,7 @@ Picture draw(int a, int r, int g, int b) {
   double radius = min(width, height) * 0.45;
 
   Paint paint = new Paint()..color = new Color.fromARGB(a, r, g, b);
-  recorder.drawCircle(width / 2, height / 2, radius, paint);
+  recorder.drawRect(new Rect.fromSize(new Size(width, height)), paint);
   return recorder.endRecording();
 }
 
@@ -25,8 +28,15 @@ bool handleEvent(Event event) {
   }
 
   if (event.type == "pointerup") {
-    view.picture = draw(255, 0, 255, 0);
+    view.picture = draw(255, 255, 255, 0);
     view.scheduleFrame();
+
+    ActivityManagerProxy activityManager = new ActivityManagerProxy.unbound();
+    Intent intent = new Intent()
+      ..action = 'android.intent.action.VIEW'
+      ..url = 'sky://localhost:9888/sky/examples/raw/hello_world.dart';
+    shell.requestService(null, activityManager);
+    activityManager.ptr.startActivity(intent);
     return true;
   }
 
@@ -40,7 +50,7 @@ bool handleEvent(Event event) {
 
 void main() {
   print("Hello, world");
-  view.picture = draw(255, 0, 255, 0);
+  view.picture = draw(255, 255, 255, 0);
   view.scheduleFrame();
 
   view.setEventCallback(handleEvent);