wassup ghost, ltnt lol. hope all is well, as far as editing jave caode with eclipse you should be able to do it, may make things easier, but compiling it, if your talking about AOSP, as in a rom, im not sure it can be done that way, if its the individual APKS your doing then it should work, well, sorta.. if you are decompiling them first you are going to have smali files to work with, and eclipse doesnt really handle smali properly, it doesnt see it as being java, therefore, it reads them as text files, you can open them and edit them. but it would be the same as editing them with gedit or notepad basically. and then to recompile the app you would have to baksmali it, flash ti and see if the changes worked.. your really better off using something like notepad++ for that. but if you are editing it from source, then you should just be able tot ake the whole folder, put it int he workspace, and import it into eclipse and edit away as if you were writing from scratch, then compile for android using the SDK and the latest API. AOSP as in the android OS, it all pretty much written in c and c++, and eclipse wont help much there, the stock apps are writtin java but most everything else is cc++. for that you would need other software, at least if you want to know if the calls your making are proper lol. if you look at the files, the ones ending in .c are written in c and the ones ending in .cpp are c++. the actual code is very similar, but eclipse if for java, and will be pretty useless for editing the actual OS files