sigh. please read the message fully? thanks. it wasn't about blocking 
as a UI concept.

>Eh, blocking on user input is rarely the way to do things.  Your
>activity has to be able to respond to other events - such as being
>killed or put to sleep when the phone rings.  A mobile phone is an
>event driven environment - so Google built Android that way.
>
>If I read your post right, I'd be doing anything that's a long server
>transaction in a thread, and if the user must wait for that, I'd
>present them with a progress dialog, which is dismissed when the
>thread completes (i.e. posts via a Runnable).
>

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