title: asset images not showing in release version of app in flutter?
body: <p>I have made a list of images and using <code>ListView.builder</code> to display the images and its working perfectly fine while debugging and even in <code>debug apk</code> of the app but when i use <code>release apk</code> its not showing the images.</p>
  <pre><code>List&lt;Activity&gt; act = [
      Activity('assets/sports.png', 'Sports', false),
      Activity('assets/sleeping.png', 'Sleep', false),
      Activity('assets/shop.png', 'Shop', false),
      Activity('assets/relax.png', 'Relax', false),]
  </code></pre>
  <p>I am using <code>ListView.builder</code> to show images like this:</p>
  <pre><code>ListView.builder(
                scrollDirection: Axis.horizontal,
                itemCount: act.length,
                itemBuilder: (context, index) {
                  return Row(children: &lt;Widget&gt;[
                    SizedBox(
                      width: 15,
                    ),
                    GestureDetector(
                        child: ActivityIcon(act[index].image)));
  </code></pre>