> 1. Whether the event can be send down to any thing behind the current > activity. No, you can't. On the Android platform, you define an Activity's UI using a hierarchy of View and ViewGroup nodes. Home & your activity are different activity, they have their own view hierarchy. Key events are always delivered to the View currently in focus. They are dispatched starting from the top of the View hierarchy, and then down, until they reach the appropriate destination. But not the view of other activity. http://developer.android.com/guide/topics/ui/ui-events.html
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