title: react native errorTimeout getting device list. When running hello world on ubuntu
body: <p>I print <code>react-native run-android</code>
  And get the following output:</p>
  
  <blockquote>
    <blockquote>
      <p>FAILURE: Build failed with an exception.</p>
    </blockquote>
    
    <ul>
    <li><p>What went wrong: Execution failed for task ':app:installDebug'.</p>
    
    <blockquote>
      <p>com.android.builder.testing.api.DeviceException: Timeout getting device list.</p>
    </blockquote></li>
    <li><p>Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.</p></li>
    </ul>
    
    <p>BUILD FAILED</p>
    
    <p>Total time: 1 mins 11.385 secs Could not install the app on the
    device, read the error above for details. Make sure you have an
    Android emulator running or a device connected and have set up your
    Android development environment:
    <a href="https://facebook.github.io/react-native/docs/android-setup.html" rel="noreferrer">https://facebook.github.io/react-native/docs/android-setup.html</a></p>
  </blockquote>
  
  <p>I have genymotion emulator running. I have defined android home and path</p>
  
  <pre><code>export ANDROID_HOME=/home/jonstark/Documents/android/
  export PATH=$PATH:$ANDROID_HOME/tools:$ANDROID_HOME/platform-tools
  </code></pre>
  
  <p>In sdk manager I have downloaded all required packages.
  What do I do?</p>