Is it possible to develop with Codename One for Windows Phone 8?

Renan, your answer is wrong. ALL applications that work on Windows Phone 7 work on Windows Phone 8. If you (as a developer) want, you can choose to upload a package that will be downloaded by WP7.x users and another package that will be downloaded by WP8.x users, but if you upload one that supports WP7, support for WP8. All games made with XNA running on both WP7 and WP8. Remember that if you make an App with WP7 support, it can not use the WP8 APIs.

That is, Junior, if you developed an App with Codename One for WP7, it works on WP8, but you can not use the WP8 SDK.

Last month was a preliminary build of Codename One with support for WP8. More details on this post on the site .

Warning for various details, such as the fact that XNA is not supported because, according to them, WP8 does not support as well; and apparently it is not possible to create a binary that can be used in both WP7 and WP8.