title: error: could not find gradle wrapper within android sdk. might need to update your android sdk
body: <p><a href="https://i.stack.imgur.com/DplS6.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/DplS6.jpg" alt=""></a>
  </p>
  
  <p><a href="https://i.stack.imgur.com/AoJtl.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/AoJtl.jpg" alt="enter image description here"></a>
  build-tools is:
  android-5.1</p>
  
  <p>platform-tools updated</p>
  
  <p>my platforms are <br>
  android-5.1 <br>
  android-17</p>