Android : How to locate diffrent images on a button boundaries

i have a Button i want to have - 4 images around its boundaries . all images exactly the same size . and they have to be located like in the shown picture.

i don't want to use image button because it can attach only one image, please dont offer to create one image on a image button - because i have a dynamic order .

Just tell me how to set the location of images progmatically according to button location .