Try processing js on Android OS.

If you like to code in processing.js, then this application will fulfill your wish on your phone or tablet with android operating system.
The APDE - Android Processing IDE requires the following permissions:

• modify and delete the contents of your USB storage - required to save sketches to the external storage 
• control vibration - required to provide haptic feedback, which can be turned off in Settings 

This includes a quick-run JavaScript - Sandbox and a tutorials that are explained in more details.
The development team from CalsignLabs has just one person.
This tell us about this alpha released application:

APDE (Android Processing Development Environment) is an integrated development environment for creating Processing sketches on your phone/tablet. APDE supports the full edit, compile, and run cycle. You don't need a computer or an SDK to start coding on the go.

The application can be found on google play here.