A company worked on Android for several years, then Google bought it.
Google has ChromeOS, with a HTML based shell. And there were some news articles that Google is merging ChromeOS and Android - we will see if those speculations were true.
In addition to this. J2ME and Symbian (the two biggest mobile platforms when Android was being developed) were both based off Java so it made sense to use it.
Google has ChromeOS, with a HTML based shell. And there were some news articles that Google is merging ChromeOS and Android - we will see if those speculations were true.