title: Layout a knob and button view
body: <p>I want to have this complex control ported into my Android XML Layout:</p>
  
  <p>I need the buttons (heart, cloud,...) and the central knob as ImageButtons, so they should be separate objects and positioned in exact positions.</p>
  
  <p>The problem is how to layout such complex button and backgrounds so it displays correctly on multiple devices having different resolutions.</p>
  
  <p><img src="https://i.stack.imgur.com/Ldvlf.jpg" alt="enter image description here"></p>