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How is Google Now (now at the “entrance”) searching inside applications?

So, Google has just released a new feature for Google Now called Now on Tap. This allows the user to get context-sensitive help from different applications ( Example video Verge ).

  • Does it just take a screenshot from the current application and use OCR to extract the text?
  • Does he have a “special permission from Google” that allows you to read values ​​in views?
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First of all, it should work using the helper API added to the M Developer Preview. However, since "Now on Tap" is owned and not released, we can only guess at that time.

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