To compile android, we need to switch from java6 to java5 and here are the steps.

1. Add the following line to /etc/apt/sources.list

deb http://ubuntu.mirror.cambrium.nl/ubuntu/ dapper main multiverse

2. Install java5

$ sudo apt-get update

$ sudo apt-get install sun-java5-jdk

$ sudo update-java-alternatives -l

java-1.5.0-sun 53 /usr/lib/jvm/java-1.5.0-sun

java-6-sun 63 /usr/lib/jvm/java-6-sun

3. Switch to java5

$ sudo update-java-alternatives -s java-1.5.0-sun