title: show only ground overlays map android?
body: <p>hello I'm implementing ground overlay in android. Now i want to clear background arround Ground overlay or show only Ground Overlay. </p>
  
  <p><strong>default</strong>
  <img src="https://i.stack.imgur.com/UoGJP.png" alt="enter image description here"></p>
  
  <p><strong>now I want</strong>
  <img src="https://i.stack.imgur.com/Av887.png" alt="enter image description here"></p>
  
  <p>so how the code ?</p>