I have designed buttons with designer and the initial image is loaded with designer. I have about 30 buttons and each has its own image. Using toggle button I would like to swap images on all 30 buttons and vise versa.
You should define a BitmapDrawable and set this one to all Button Backgrounds.
If you change the BitmapDrawable.Bitmap property it should change on all Buttons.
I haven't tested it but it should work.