I have been developing for win7 mobile (XNA/silverlight and will continue to do so, love everything about it) but I wanted to branch a few of my more polished games to google app store online, and perhaps android(though not sure, as with all the different versions it makes learning/loading applications a bit tricky)

What is the most versatile language to start learning from chrome apps/android:

Java would be excellent for android, but could I port it to a web app for chrome? (and its close to C#)

Flash would work for a web app as I can just embed it into a html page (have done actionscript before, didn't care much for the IDE though), but would it also work on android?

or I guess there is always C/C++ but haven't heard much about that, though I think it works for both (though C++ does interest me)

Any advice would be excellent, thanks.