AndroidTwitpic is a project mainly written in Java, it's free.
How to send image to Twitpic from Android
This sample project shows how to send image to Twitpic. External Twitter4j and signpost jar files can be downloaded from: http://londatiga.net/downloads/Twitter_ExtJars.zip.
Author: Lorensius W. L. T [email protected] Website: http://www.londatiga.net