title: Android imageview matrix operations
body: <p><br>
  Me used <code>imageview</code> to display image.<br>
  I set the scale type as <code>ScaleType.MATRIX</code><br>
  There is option for <code>scaling</code> (<code>zooming</code>), <code>dragging</code> and all. All this are done by doing matrix manipulations mainly <code>postTranslate</code> and <code>postScale</code><br>
  My problem now it can be drag such that the image is not in the screen<br>
  So how we get how much it is dragged.<br>
  <strong>In brief</strong><br>
  I have two matrix (<code>android.graphics.Matrix</code>) one the initial stage and the other that i got after drag and zoom. Now from this 2 matrices i want to calculate <strong>how much it moved in x-direction and y-direction?</strong><br>
  What matrix operation i need to do here.<br>
  Thank you</p>