It's not just Android. Google is a massive Java shop and a lot of their stuff is written in it. They have plenty of Java expertise in all areas. It's also the

It's not just Android. Google is a massive Java shop and a lot of their stuff is written in it. They have plenty of Java expertise in all areas. It's also the main language taught at universities, which helps with hiring. I've heard that Google's public use of Python is more for PR. If you want to change this then the way is to change what educators are teaching. Java is probably one of the reasons why they acquired Android. Possibly even one of the reasons Android is written in Java. I once knew a senior Java architect who turned down a job at Google. This was back in the "who needs another Yahoo!" days. Needless to say they regretted that decision.