Language used in Android Application.

Hi Mark, the standard language for developing with android is Java. Though, there is the possibility to use java's JNI to connect to native code, such as C. There are also OpenGL api's in the android sdk, that allow for doing graphics with OpenGL. Most people use the Eclipse ide to develop with, its a very good and free IDE. Here are some links to get you started:

Official Android Developer site: http://developer.android.com/index.html
To get the android SDK: http://developer.android.com/sdk/index.html
To get Eclipse: http://www.eclipse.org/
To get the Java SDK: http://www.oracle.com/technetwork/java/javase/downloads/jdk6-jsp-136632.html

I forgot to mention, that there is also a new tool from google called Android App Inventor. It lets you "build" apps without any programming knowledge. http://appinventor.googlelabs.com/about/

Yep, I haven't tried it yet, but I want to. The sign-up thing is not that big of a deal, but for some reason, I just haven't gotten around to it yet.