Crossplatform development for iPhone & Android

As far as 开发者_运维技巧I can see there doesn't seem to any mature environment for crossplatform development for iPhone & Android slate (but feel free to correct me).

I don't know Ipad, I must admit. Any reason why plain Java wouldn't cut it? (maybe underlying things like database (I am not too concerned with hardware))

I am thinking to try to make everything browser based, although that won't get around the d/b & h/w issues, unless there is JS framework that does so.

Any advice?

HTML5 (already mentioned) could be a good option.

Some other options are:

PhoneGap - an open-source cross-platform mobile development environment. It basically uses a stylized web-page and Javascript that is compiled into a native app on each platform.

Worklight (http://www.worklight.com)- a commerical product that does the same thing, but it requires a dedicated Worklight server on the backend. Worklight also allows you to target targets additional platforms (with same codebase) such as Yahoo Widgets, iGoogle, Vista gadgets, etc.

Neither Java or Flash or supported on iPhone/iPad. Basic reasoning being cross-platform development leads to a poor second rate user experience. Do a quick search to see thousands upon thousands of blogs and articles on the topic.

Otherwise look at HTML 5 it gives you a client side database to play with, you don't specify what hardware issues you are implying.