title: Ionic Framework failed to run on android emulator
body: <p>I've followed this guide to install the android SDK: 
  <a href="https://codesundar.com/ionic-cordova-environment-setup-for-windows-mac/" rel="nofollow noreferrer">https://codesundar.com/ionic-cordova-environment-setup-for-windows-mac/</a></p>
  
  <p>and setup environment files and all is correct</p>
  
  <p><a href="https://i.stack.imgur.com/PYKc8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PYKc8.png" alt="enter image description here"></a></p>
  
  <p>and got an error: <strong>No valid Android SDK root found.</strong></p>
  
  <p>This is my command line result:
  <a href="https://i.stack.imgur.com/bKqdL.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bKqdL.png" alt="enter image description here"></a></p>
  
  <hr>
  
  <p>I've also tried the <code>--no-native-run</code> and it still not working.
  <a href="https://i.stack.imgur.com/UlrzJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/UlrzJ.png" alt="enter image description here"></a></p>