I have two png image files that I would like my android app to combine programmatically into one png image file and am wondering if it is possible to do so? if so, what I w
You can do blending. This is not particular to Android. It's just universal image processing.
You may find these articles & samples & code useful:
http://www.jhlabs.com/ip/
http://kfb-android.blogspot.com/2009/04/image-processing-in-android.html
http://code.google.com/p/jjil/
Image Processing on Android