title: How to take off a PX4 autopilot using mavlink message?
body: <p>I follow the following link's sample code</p>
  
  <p><a href="http://android.dronekit.io/first_app.html" rel="nofollow">http://android.dronekit.io/first_app.html</a></p>
  
  <p>and when I set API VehicleApi.getApi(this.drone).arm(true);
  vehicleState.isFlying() automatically becomes true.</p>
  
  <p>Can anybody tell me what this problem is?</p>
  
  <p>What I need is:
  1. take off, land</p>
  
  <p>I read from some website that the dronekit-android does not support the mode changing. If so, how should I send the mavlink message to take off and land?
  So far, I can sucessfully send the mavlink message to the PX4 board.</p>
  
  <p>Thanks for replying.</p>
  
  <p>Thank you for replying.</p>
  
  <p>BR
  SeanH</p>