title: how to display center radius portion of map in android
body: <p>I have searched a lot but didn't find it. so  sorry if this is a repeated question..</p>
  
  <p>what i want is i want to highlight center portion of my map in android like this..</p>
  
  <p><img src="https://i.stack.imgur.com/u8VE9.jpg" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/YAHMY.jpg" alt="enter image description here"></p>
  
  <p>as you see above both image show circle of some radius..so any idea how yo achieve this ???</p>
  
  <p>help will be greatly appreciated. Thanks in Advance </p>