Android uses the Linux kernel. But when one talks about Linux, one usually means GNU/Linux: that is, the kernel and the unix (or rather, not unix) userspace.
Android has little, if any, of that user space. That is, assume I have a dynamically linked Linux program: I'd probably won't be able to run it on Android, even if cross-compiled to the proper hardware, because much of the libraries and tools one expect a Linux distribution to have are missing there.
Android has little, if any, of that user space. That is, assume I have a dynamically linked Linux program: I'd probably won't be able to run it on Android, even if cross-compiled to the proper hardware, because much of the libraries and tools one expect a Linux distribution to have are missing there.