Syncing Android and Server

I don't know what this is called, but it is something like syncing android application and a Web server. Examples are RSS Feeds and Weather Forecast

Does anyone know the concept behind developing application? I mean how do you sync the Android phone with a web server. Is there any programming needed in the server side and the client side(Android)

Are there 开发者_C百科any programming books that tackles this subject? Thanks.

What should I do to connect to Server from eclipse - Android?

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The server should make the data available in a meaningfull parsable format (for machines). For example RSS/XML feeds, etc. Your application should poll frequently and updates the status/screen.