I want to start trying to develop apps for android, but I'm confused about that:>it is really necessary to get the ogle sdk?>where it's the source of the android versions (aosp,jelly whatever)>what it's the quick rundown to do (extract this , compile that ...etc)alsowhat exactly means to "compile android"?do you compile the moded kernelonly or are you compiling this and a basic set of apks?what are the apks? (I mean if these are interpreted or compilated stuff)Thanks a lot anon.