title: Check if a latitude and longitude is within a circle
body: <p>See this illustration:</p>
  
  <p><img src="https://i.stack.imgur.com/C8R24.png" alt="enter image description here"></p>
  
  <p>What I would like to know is:</p>
  
  <ol>
  <li>How to create an area (circle) when given a latitude and longitude and the distance (10 kilometers)</li>
  <li>How to check (calculate) if a latitude and longitude is either inside or outside the area</li>
  </ol>
  
  <p>I would prefer if you can give me code example in Java or specifically for Android with Google Maps API V2</p>