Ubuntu Mobile is an Ubuntu edition that targets an exciting new class of computers called Mobile Internet Devices. Ubuntu Mobile, based on the world’s most popular Linux distribution, and MID hardware from OEMs and ODMs, are redefining what can be done in mobile computing.
Android is software stack for mobile devices from Google. It’s open source and based on the Linux kernel.
The Android platform is a software stack for mobile devices including an operating system, middleware and key applications. Developers can create applications for the platform using the Android SDK. Applications are written using the Java programming language and run on Dalvik, a custom virtual machine designed for embedded use which runs on top of a Linux kernel.