Correct way of Encrypting and Decrypting an Image using AES

Question

EDIT ::: The code in the question works, but it takes around 10 seconds for getting back to the activity once the image is taken in camera. I gave up this approach and used Face

Answer 1

The code in the question works, but it takes around 10 seconds for getting back to the activity once the image is taken in camera. I gave up this approach and used Facebook's Conceal Library to encrypt and decrypt images. Link to Facebook's Solution : Facebook Conceal - Image Encryption and Decryption