Are There Any Android Devices Or Any Method Can Open Front And Back Camera At The Same Time?

For some reason, I need to open front and back cameras at the same time and I tried the new Camera2 API and get ERROR_MAX_CAMERAS_IN_USE error when I tried to open the second Camer

Solution 1:

The Samsung Galaxy S4 and Samsung Galaxy S5 are two devices which can use a front and a rear camera simultaneously

I'm not sure about public apis, but Samsung offers Samsung specific SDKs you may want to check there on Samsung Developers

Solution 2:

I know this is way late but here are two post I made on this to help anyone who runs into this:

https://stackoverflow.com/a/28811277/1138878

https://stackoverflow.com/a/43445052/1138878

Short answer: it's possible but depends on hardware/chipset (Snapdragon 801 and higher level hardware).