how to use expandable listview for different images?

how to use expandable listview for different images?

I want to use different images in place of text string as child of
expandable list view. and on click event of these images,the different
child layouts should open. Can anybody tell how can i achieve this? I have
gone through many codes but unable to find correct answer.I don't
understand how to fetch images on expandable list view from drawable
folder. I know how to get text from strings but I have used array for
images and don't know how to add these. I am new to android so don't know
about proper format of code.