Why hasn't Google created their own IDE?

I think Google prefers to support existing open source projects that are successful. Internally, a lot of Java engineers at Google use Eclipse, which is a great IDE for Java development. No need to re-invent the wheel, instead it makes more sense for them to contribute to the success of Eclipse.

FYI, Google also just donated $20K to the Eclipse foundation: http://www.thepowerbase.com/2012/09/google-donates-20000-to-...

Because you can already develop Android apps quickly and efficiently with a number of already built and well supported IDEs? It makes no sense to spend money on something for a niche thing like Android development.

Also http://developer.android.com/sdk/index.html

Steve Yegge's Grok project might become a potential candidate.

Simple: Because googlers all hate IDE's and use vim.

They do employ the author of Vim.

It was surprising news to me, but I doubt this alone is a good reason to ditch the idea of a customised IDE.

For those who hasn't heard, this post is from Bram himself: http://gmailblog.blogspot.com/2010/08/new-in-labs-find-docs-... He seems to work for Gmail.