Android runs some scripting languages, so you can code on-the-unit. http://code.google.com/p/android-scripting/ http://code.google.com/p/android-scripting/ pyth

Android runs some scripting languages, so you can code on-the-unit. http://code.google.com/p/android-scripting/ http://code.google.com/p/android-scripting/ python, lua, beanshell (java scripting), perl and ruby (via JRuby) and some JVM languages. Although scripting languages tend to be slower, especially on a smartphone and especially on this one (500MHz), they are increasingly mainstream, and the tools are available on the unit. And probably, vastly more powerful than the platforms most of us got started on (ZX81 here). disclaimer: I don't have an Android, and haven't used these languags, so don't know what limitations they have on a smartphone, nor how serious those limitations are.