You can import all Android sources into eclipse. Instructions are here . Then you have to make some changes (for example, enable android-common_intermediates / javalib.jar instead of google-common_intermediates / javalib.jar) and you will have the opportunity to evolve in eclipse.
Eclipse separates Android source files from multiple projects (I think according to classpath elements). If you want to change this behavior, you should look in that direction.
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