Unable To Click On Regions Of 1st Image Where 2nd Image Overlapping / How To Do

I have 2 imageviews which have animationdrawable backgrounds to animate a box opening and closing when you click on it. The 2 images are slightly overlapping (the transparent area) so they can be closer together.

The problem this is causing is that i am unable to click on regions of the 1st image where the 2nd image (transparent area) is overlapping.

Is there a way to set a clickable region of an imageview?

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