[android-developers] Detecting Package Update

How can a package determine that it has been updated and that it,
therefore, must stop and restart itself?

Specifically, if my appwidget is installed on the homescreen and the
user downloads a new version, I have to make sure that the widget is
uninstalled and reinstalled so that it executes the later version of the
app. I don't think that happens automatically, does it?

--
Jake Colman -- Android Tinkerer

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