no it's my explanation that was not clear..
I have 3 buttons array (0 to 2)
I have 3 images (0.png, 1.png and 2.png)
I have 3 more images (0.jpg, 1.jpg and 2.jpg)
I have 3 imageViews (imageView(0), imageView(1) and imageView(2)
Then just swap the images that correspond to the clicked button index