If you find the official Facebook API a bit complicated, the you should give a try to FBRocket.
Tag Archives: social
Android Twitter usage
It is easy to update your twitter status from your android app:
http://www.androidpeople.com/android-post-status-to-twitter-using-jtwitter-example/
However these instructions are a bit outdated, because twitter has newer authentication based on OAuth. Check the JTwitter site for details: JTwitter