title: How to get the euler-angles from the rotation vector (Sensor.TYPE_ROTATION_VECTOR)
body: <p>I rotated my android device in x direction (from -180 degree to 180 degree), see image below.
  <img src="https://i.stack.imgur.com/kEa5E.jpg" alt="enter image description here">
  <br>
  And I assume only Rotation vector x value is changed. Y and z maybe have some noise, but it should be not much difference among the values.</p>
  
  <p>However, I receive this. Kindly see</p>
  
  <p><a href="https://docs.google.com/spreadsheets/d/1ZLoSKI8XNjI1v4exaXxsuMtzP0qWTP5Uu4C3YTwnsKo/edit?usp=sharing" rel="nofollow noreferrer">https://docs.google.com/spreadsheets/d/1ZLoSKI8XNjI1v4exaXxsuMtzP0qWTP5Uu4C3YTwnsKo/edit?usp=sharing</a></p>
  
  <p>I suspect my sensor has some problem. </p>
  
  <p>Any idea? Thank you very much.</p>
  
  <p>Jimmy</p>