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Creating your own Widget problem ?

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I am building a Widget which would give me temperature of a particular city. Now to create a widget,
I am using a Activity class , where I supply the city name and state name to the widget.

But before the View of the Activity class is displayed the onUpdate method of my WidgetProvider is
called and it tries to read the values of city name and state name, and it creates a widget.

I want the onUpdate of WidgetProvider should be called only after I press save button on my View of
the Activity.

Please throw some light on this ?
Consider Paul's rocket mass heater.
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