Android app 101: how do I sync web contents to the app? just starting building applications

I'm trying to build my own android application, and I was wondering if someone can direct me or help me find a tutorial o开发者_Go百科n what to do to get contents between the two. I've been teaching myself php and web building and now I'm trying to build an android app.

But I have no idea as to how to sync the two pieces together? Say if I wanted to update some contents on my php page, how would it be updated to my android app? I'm also beginner at java, but I do have ambition to learning these things.

Thank you in advance fellow members.

ps I've been messing around with eclipse and the android platform.

I don't know if you wanted to write it from scratch or find some sort of library. I've also just started android development and I stumbled across a project called openmobster.
http://code.google.com/p/openmobster/ It's a library for integrating mobile applications with web based services. They have tutorials and documentation in the wiki section. For example: http://code.google.com/p/openmobster/wiki/AndroidSyncApp

If you were interested in writing something from scratch you should be able to browse the source to see some of the things they are doing.