Some guy ask me for an plugin develop by me some time ago, about how to access the android camera and display as an texture, now with the new APL system we can develop our own plugins for android without modify the engine source, take it as a little tutorial instead as a plugin, because AFAIK that functionality comes with the new 4.13 or 4.14 (not sure, MR Chris Babcock told me), meanwhile you can use mine.
I split the core functionality inside an UActorComponent with only 3 methods, one to call and open the camera, other for update, and finally one for shutdown. the code itself it´s easy, however if you have some question please post the thread
EDIT: I add a full project inside my drive, for some reason I have unexpected pixel convertion in unreal 4.13 when use development mode, for now just deploy on shipping mode and will be work, ue 4.12 keep working on both develop and shipping
**4.14.1 update link here: ** https://drive.google.com/file/d/0B8MQ0PFXL_i7alVjTFpJSnZhNFU/view?usp=sharing
**4.13 Link here: ** https://drive.google.com/folderview?id=0B8epJbyvXtUHc0xqemxiX2JDeGM&usp=sharing
see the video:
basic BP sample