twitter integration using OAuth sign post

I want to integrate twitter in my application.Can anybody suggest how should i proceed using the cosumer key,token,token secret.I got 开发者_如何学Pythonsome code but could not understand the use of the cosumer key,token,token secret,callbackurl.can anybody help me giving the complete explanation of each functions,variable used ?

The oauth-signpost java project should run in Android http://code.google.com/p/oauth-signpost/

There is some demo code here: https://github.com/kaeppler/signpost-examples/blob/master/OAuthTwitterExample/src/TwitterMain.java