Kolya Polyarniy 2537

Homework done.

To choose RSS feed - press menu hardware button.

I can't imagine more realistic use case of intent service than this:
downloading feed every 30 minutes, if it is more actual, than showed to user - notificate user about this, and replace feed by more actual one.
But it is not useful - because as for me - it is simplier to press refresh button and wait three seconds to be sure, that feed is actual.