Android: Java, C or C++?

Question

I wrote some simple apps in Android using Java.
But later I found this:

It provides headers and libraries that allow you to build activities, hand

Answer 1

Android is Linux underneath so you can run any language on it. I have run Perl scripts on an Android phone for fun. From a practical, application development point-of-view, Google's implementation of Java running on Dalvik would be the typical route to take.