Take a snapshot of front camera in android

I'm working on an app which needs to take a picture with the front facing camera of the device without preview and/or asking the user for it. It's a Anti Steal app. I've seen alot of code where they show previews of the camera, where they use the front and/or back camera and so on.

My question now is: How can I take a snapshot of the front camera and save it onto the sd card, without asking the user for permission and without previewing the camera?

Thanks alot for help.

Source: http://stackoverflow.com/questions/17925406/take-a-snapshot-of-front-camera-in-android

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