title: Android ImageView - Get coordinates of tap (click) regardless of scroll location or zoom scale
body: <p><strong>Background:</strong>
  I have an ImageView that I've modified to be scrollable (drag) and zoom-able (pinch zoom). I used the exact technique mentioned in the "Hello, Android" 3rd edition book that can also be found <a href="http://www.zdnet.com/blog/burnette/how-to-use-multi-touch-in-android-2/1747?tag=content;siu-container">here</a>. This technique uses matrix transformation to handle both scrolling and zooming.</p>
  
  <p><strong>My Problem:</strong>
  When a user taps on the image, I want the coordinates of that tap in relation to the image itself, regardless of how the image has been scrolled or magnified. For instance, if my image is 1000x2000 and I scroll and zoom the image. Then I tap on the image at a certain point, I want to know what that point is in relation to the 1000x2000, not just the screen area. How can I do this?</p>