Xcode is iOS and I don't have an android
edit: then I like how apples stats at WWDC is the complete opposite.
Apple will inflate their own stats. You need a different and trusted data collection company for non-biased facts.
Just to say, in case you change your mind, you can get android development tools for free and the Android SDK comes with android virtual devices so you can still run and test them on a virtual device.
Thanks for agreeing to make your apps for android as well. I sent you some development tool-links