SkyDemo.apk should show thumbmails when offline

sky/sdk/example/demo_launcher/lib/main.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.
 
 import 'dart:sky';
 
 import 'package:mojom/intents/intents.mojom.dart';
+import 'package:sky/mojo/asset_bundle.dart';
 import 'package:sky/mojo/shell.dart' as shell;
 import 'package:sky/painting/box_painter.dart';
 import 'package:sky/theme/colors.dart' as colors;
 import 'package:sky/theme/typography.dart' as typography;
 import 'package:sky/widgets/basic.dart';
 import 'package:sky/widgets/card.dart';
 import 'package:sky/widgets/fixed_height_scrollable.dart';
 import 'package:sky/widgets/flat_button.dart';
 import 'package:sky/widgets/material.dart';
 import 'package:sky/widgets/scaffold.dart';
 import 'package:sky/widgets/theme.dart';
 import 'package:sky/widgets/tool_bar.dart';
 
+AssetBundle _initBundle() {
+  if (rootBundle != null)
+    return rootBundle;
+  const String _kAssetBase = '..';
+  return new NetworkAssetBundle(Uri.base.resolve(_kAssetBase));
+}
+
+final AssetBundle _bundle = _initBundle();
+
 void launch(String relativeUrl, String bundle) {
   Uri url = Uri.base.resolve(relativeUrl);
 
   ActivityManagerProxy activityManager = new ActivityManagerProxy.unbound();
   ComponentName component = new ComponentName()
     ..packageName = 'org.domokit.sky.demo'
     ..className = 'org.domokit.sky.demo.SkyDemoActivity';
   Intent intent = new Intent()
     ..action = 'android.intent.action.VIEW'
     ..component = component
@@ skipping 22 matching lines @@
 
 List<Widget> demos = [
   new SkyDemo(
     name: 'Stocks',
     href: '../../stocks/lib/main.dart',
     bundle: 'stocks.skyx',
     description: 'Multi-screen app with scrolling list',
     textTheme: typography.black,
     decoration: new BoxDecoration(
       backgroundImage: new BackgroundImage(
-        src: '../assets/stocks_thumbnail.png',
+        image: _bundle.loadImage('assets/stocks_thumbnail.png'),
         fit: BackgroundFit.cover
       )
     )
   ),
   new SkyDemo(
     name: 'Asteroids',
     href: '../../game/main.dart',
     description: '2D game using sprite sheets to achieve high performance',
     textTheme: typography.white,
     decoration: new BoxDecoration(
       backgroundImage: new BackgroundImage(
-        src: '../assets/game_thumbnail.png',
+        image: _bundle.loadImage('assets/game_thumbnail.png'),
         fit: BackgroundFit.cover
       )
     )
   ),
   new SkyDemo(
     name: 'Interactive Flex',
     href: '../../rendering/interactive_flex.dart',
     bundle: 'interactive_flex.skyx',
     description: 'Swipe to adjust the layout of the app',
     textTheme: typography.white,
     decoration: new BoxDecoration(
       backgroundColor: const Color(0xFF0081C6)
     )
   ),
   new SkyDemo(
     name: 'Sector',
     href: '../../widgets/sector.dart',
     bundle: 'sector.skyx',
     description: 'Demo of alternative layouts',
     textTheme: typography.black,
     decoration: new BoxDecoration(
       backgroundColor: colors.Black,
       backgroundImage: new BackgroundImage(
-        src: '../assets/sector_thumbnail.png',
+        image: _bundle.loadImage('assets/sector_thumbnail.png'),
         fit: BackgroundFit.cover
       )
     )
   ),
   // new SkyDemo(
   //   'Touch Demo', '../../rendering/touch_demo.dart', 'Simple example showing handling of touch events at a low level'),
   new SkyDemo(
     name: 'Minedigger Game',
     href: '../../mine_digger/lib/main.dart',
     bundle: 'mine_digger.skyx',
@@ skipping 65 matching lines @@
           child: new DemoList()
         )
       )
     );
   }
 }
 
 void main() {
   runApp(new SkyHome());
 }