iOS Activating app with volume buttons

[Kamil1232]

Is there a way I could set up an app to run in the background and open up and activate if you say double tapped the volume down button?

 

[ChristianVirtual]

Unlikely with official API ... wouldn't allow you to change the use of standard buttons like those. It would be against their overall concept and desired UX.
If possible when jail broken I don't know ...

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Something learned: there is actually an API, see http://stackoverflow.com/questions/7528443/iphone-detect-volume-keys-press

Might be possible to build something on it; still it would be against the expected Ux

 

[xArtx]

It’s specifically mentioned in guidelines that you can’t use certain buttons for any other function.
(even if you find a way to do it), and the volume buttons are included.