Visit http://linux.softpedia.com/get/Programming/Interpreters/Android-32340.shtml

Basically copy and paste all of that below and you'll have installed and started the Android SDK before you know it.

wget http://dl.google.com/android/android-sdk_r12-linux_x86.tgz
sudo apt-get install openjdk-6-jre openjdk-6-lib openjdk-6-jre-headless
tar -xvf android-sdk_r12-linux_x86.tgz
cd android-sdk-linux_x86/tools
./android