You install Orbot first, that's your Tor browser in effect. With that installed on it's own you can surf the net anon just like desktop Tor browser (little globe in the top right corner).
Then you install Gibberbot, that's the gadget that encrypts your txt/email traffic from your XMPP compatible account (Jabber,Google).
After you've installed those two programs (10 mins tops) you just start Orbot then start Gibberbot, link your account and you're good to go.
It only works if the person you are communicating with is also using the same software though, so all parties who need to communicate anon need them installed and linked too.