Question

I have a program where I want to display 2 buttons that are arrows pointing left and right. Both are images and I am required to have them on my calculator type program. If I hit the right arrow, I want the field where there is a calculation involved to increase, and the button to get bigger. I have 6 images: a small arrow (left and right), a medium (left and right), and a large (left and right) set. how would I go about creating these buttons?

the link to the lab homework is here:

http://penguin.ewu.edu/cscd439/android/Summer_12/cscd439_l2.html

I just dont really understand how to create a button off of an image I download, and how to make the image change on click.

Answer 1

If you want to increase the button image size and edit text field size on button click then simply replace the smaller images with the images of bigger size you want ,
like this

button1.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub

                 button1.setBackgroundResource(R.drawable.buttonimg);

                    edittext1.setBackgroundResource(R.drawable.edimg);
            }
        });

here

buttonimg and edimg are images in drawable folder