I've found several online recipes for baking cakes in a rice cooker; they all assume a rice cooker with a "Cake" setting that allows you to specify a cooking time. My rice cooker has settings for white rice, brown rice, congee, etc., etc., but no cake setting. I assume there's a workaround out there. Is there a specific setting that's best to use (e.g., brown rice as opposed to white, or whatever)?
I've seen a youtube video that does it with what looks like a cheap rice cooker.
I think that you need to experiment and test to see how long it will take to cook; every rice cooker will be different.
Use a wooden pick and test, it should come out dry(ish).