How to get my emoticons on my iphone 4 to show up on android?

I have an iPhone 4 and most of the people I text have androids, how do I get my emoticons I send to show up in the texts I send to them? They say when I send something it shows up as a box or something random. And when they send me Smiley's it shows up regular like this. Instead of animated. How can we get our smileys to work together so we can both see them. I can't see theirs, they can't see mine. So confused! I'm using emoji if that means anything that's the only way to make an animated smiley on iPhone. I just added that 'language keyboard' to my keyboards but on android all you gotta do is insert a smiley, totally different process. My android tablet to android phone shows Smiley's perfectly, but not iPhone.

Different operating systems. It won't work from iphone to android.