Humiditytracker is a project mainly written in Java, based on the GPL-3.0 license.
Android app that lets you record humidity data and graph it.
Copyright 2011 Samuel Marshall
Released under GNU Public License v3 (see LICENSE)
This is an Android app created using Google's standard tools. If you want to build it, go ahead and download the source.
Note that I threw this together in a hurry; it's a total mess and I don't care. :) There's basically no documentation, the code is terrible, but it does work.
If you just want to run it, please search 'humidity tracker' on Android market.