How can one blur a rectangular region of the screen (region could
intersect with more than one activity's windows)... we are able to get
blur working for a particular view itself by implementing a custom
onDraw() method and Paint.setMaskFilter() --> BlurMaskFilter but can't
figure out how to apply a blur to another activity's view.

If this is just not possible, then please demonstrate how to take a
snapshot of the screen so that we can manipulate that bitmap image as
part of our blur activity.  I've only seen the snapshot capability
offered on the WebView but it's a very useful utility to have for all
views in general.

Thanks,
Cheryl
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