apache license for android

I read a few blogs on why google chose apache license for android. It mentions that if android were to use gpl license then nobody would then adopt android, because any properiatery software that are pluged-in to android would have to be made open source. Even though it would lead to more openness and faster development, many would like to avoid it. It has even chosen bionic libc just to keep the gpl license out of user space. It would be a nightmare for developers if everything that they develop were to be made open source. So apache license does make sense...