well, I think you'd want to start with an HttpClient (http://
developer.android.com/reference/android/net/http/
AndroidHttpClient.html) to make the request and download the
resource(s). Then you would need to extract the information you need
from the content. This is commonly called "scraping" since you are
trying to extract data from presentation views. It's hairy, and likely
to involve any number of parsers or (gads!) regular expressions to
accomplish the task. I'd avoid this route if at all possible.

If the service you are accessing actually intends for other
applications to consume it, perhaps there is already a public API
(e.g. twitter, facebook, etc. all have http APIs you can use). At the
very least, perhaps the site supports alternative formats for the
content - like xml or json. If requesting a different format is an
option, you'll have a much easier time extracting the data since you
can use a standard parser.

-Mike

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