title: hierarchy is not working for my device
body: <p>when I run hierarchy in terminal. it can show the interface of it, but can not connect to my device.And it can connect to virtual emulator. It remind me in terminal like that,</p>
  
  <ol>
  <li>Adb rejected forward command for device 172.18...... unknown host service</li>
  <li>missing forward port for 172.18.....</li>
  <li>unable to get view server protocal version from device 172.18....</li>
  </ol>
  
  <p>How can it show my view structure of my device in the hierarchy viewer. Can anyone help me ?or 
  anyone who knows where to find the knowledge of the hierarchy. thanks in advance.</p>