Tool for localizers to generate rough layout preview images of an Android app in other language?

For my open-source Android app, many users contribute localizations to tens of languages. They are not developers, and some don't even have an Android device, so they can not compile to view immediately how it looks.

Question: Is there a webapp or tool that takes the layout and localization XML files, mixes them, and generates images of the various screens?

It would not be perfect (many strings appear only in 开发者_StackOverflow社区generated dialogs), but better than nothing. Right now translators can not see how it looks until I release a beta version. That would motivate translators a lot, and lead to translations of better quality (especially for text lengths).

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Now Eclipse does this with the ADT plugin.

Just open a layout XML file, select the "Graphical layout" tab, and change the language using the dropdown menu.