unregisterReciever on cancel() ? about android-protips-location HOT 3 OPEN

I had to wrap that in a try/catch as sometimes there was an Exception if the 
receiver had not been registered.

Also, I added:

lastLocationFinder.cancel();

to onPause() in the main activity (for my app at least this was required)

I also had to wrap the unregisterReceiver(singleUpdateReceiver) in a try-catch 
because the onReceive method was getting called twice and on the second time it 
triggered an IllegalArgumentException because the receiver had been 
unregistered on the first call to onReceive. Anyone know why the onReceive is 
called twice sometimes? One way to test this is to comment out the if check in 
GingerbreadLastLocationFinder.getLastBestLocation(...) to force the receiver 
registration.

in cancel() method check the boolean flag indicating if the receiver has been 
already unregistered in onReceive()