Pick image from sd card, resize the image and save it back to sd card

Question

I am working on an application, in which I need to pick an image from sd card and show it in image view. Now I want the user to decrease/increase its width by c

Answer 1

You should ideally use multitouch instead of using a button to increase/decrease width. Here's an amazing library. Once the user decides to save the image, the image translation matrix must be stored persistently (in your sqlite database). Next time the user opens the image, you need to recall the matrix and apply it to your image.

I've actually done this before.