How difficult is it to convert a Java program to an Android App?

Say I have a Java program that I used Swing to make. How difficult would it be to convert it to an android app? How could I go about learning to do so?

Android works in a very different way than swing. You wouldn't really be "converting" it per se... more, rewriting it and, if you're lucky, taking bits and pieces of your old code and inserting it into different places.

I believe Google has its own getting starting tutorials when you download the android dev kit.
Lynda.com is a good resource I've used in the past, but they will charge you for membership.
Also, there are probably plenty of free tutorials on the web. I don't know any off the top of my head. Personally, I don't do much with mobile development.

If your program is very modular with well separated model-view-control sections, then portions of your model may be usable for an Android app, but of course the view and control portion would not be usable in the least.

Hi,

Android code is different from java swing...So first you learn difference between java swing and android before start the code conversion.. That will be used for easy to covert java swing code to android