title: Android, check alpha of pixel?
body: <p>I get the colour of my bitmap under the touch x and y:</p>
  
  <pre><code>int myX = (int)event.getX();
  int myY = (int)event.getY();
  int color = pngTestBM.getPixel(myX,myY);
  </code></pre>
  
  <p>How can I check if the pixel is transparent?</p>