title: android appwidget won't update from activity
body: <p>I have a simple appwidget and I want to update it when an action occurs in an activity (in the same app). in onUpdate(), I immediately update the widget, which works fine. In my activity, I call the same static update method in my appwidget that is called in onUpdate() to update the views. the widget is not updated.</p>
  
  <p>I can trace the code right into the AppWidgetManager.updateAppWidget() method, and all this good, but the widget does not update.</p>
  
  <p>The only possible difference I can see is that the context object passed into my static update method is different, when it's called from the context of an activity vs. the context of a appwidget's onUpdate() method. however, there are lots of examples on the web of this so I expect it should work.</p>