How to take photo with front and rear camera simultaneously? [duplicate]

Question

I'm trying to make an app that takes a picture using the front and the rear camera in one picture.

This is kinda how it would look.

I've read http://developer.android.com/reference/android/hardware/Camera.html and searched and really couldn't find anything on the subject but I know I saw on the app store of other apps like this.

Answer 1

Mostly it depends on the hardware of the device and most of the devices now do not allow use of both cameras simultaneously. Even if some device will be able to use both cameras, if you want to make application that runs flawlessly on as much devices as possible (and this is what you want) you should not implement this solution. Google says:

In order for your application to be compatible with more devices, you should not make assumptions about the device camera specifications

What you can do, and it depends on the application you are writing is to periodically take pictures once with the front camera and the second time with the back camera.