title: flutter Image.network not working on release apk
body: <p>Getting weird issue. If I run app in simulator, works fine. If I installed app by connecting android device works fine. But if I made apk by <code>flutter build apk</code> and installed in device.</p>
  
  <p>Network image not coming? Why? any thing is going wrong? No need to provide code. For display network image, I'm using simple <code>Image.network</code> with url from google image.</p>
  
  <p>I have tried with <code>flutter clean</code> and then <code>flutter build apk --release</code> but same issue coming</p>
  
  <blockquote>
    <p>NOT WORKING BY RELEASE APK:</p>
  </blockquote>
  
  <pre><code>Uer-MacBook-Air:AppName user$ flutter build apk --release
  Initializing gradle...                                              2.0s
  Resolving dependencies...                                           3.1s
  Running Gradle task 'assembleRelease'...                                
  Running Gradle task 'assembleRelease'... Done                      63.4s
  Built build/app/outputs/apk/release/app-release.apk (8.1MB).
  </code></pre>
  
  <blockquote>
    <p>WORKING BY DEBUG APK </p>
  </blockquote>
  
  <pre><code>Uer-MacBook-Air:AppName user$ flutter build apk --debug 
  Initializing gradle...                                              3.5s
  Resolving dependencies...                                           5.5s
  Running Gradle task 'assembleDebug'...                                  
  Running Gradle task 'assembleDebug'... Done                        36.2s
  Built build/app/outputs/apk/debug/app-debug.apk.
  </code></pre>
  
  <p>Anybody has faced this type of issue? I have installed many apk by <code>flutter build apk</code> and that was work fine and right now not working in release mode? But when I tried with debug mode <code>flutter build apk --debug</code> its working fine means images are displaying?</p>
  
  <p>What I have to add some permission for release mode apk? </p>