The Sun JDK is no longer in Ubuntu's main package repository. In order to download it, you need to add the appropriate repository and indicate to the system which JDK should be used.

Java 6: for Gingerbread and newer

  $wget dl.cubieboard.org/software/tools/android/jdk1.6.0_45.tar.gz

Input in terminal:

$ sudo vim ~/.bashrc

Add :

JAVA_HOME=/work/tools/jdk1.6.0_45
export JRE_HOME=/work/tools/jdk1.6.0_45/jre
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

Then save and input :

$source ~/.bashrc

You will need a 64-bit version of Ubuntu. Ubuntu 12.04 is recommended. Building using an older version of Ubuntu is not supported on master or recent releases.

$sudo apt-get install git gnupg flex bison gperf build-essential \
zip curl libc6-dev libncurses5-dev:i386 x11proto-core-dev \
libx11-dev:i386 libreadline6-dev:i386 mingw32 tofrodos \
python-markdown libxml2-utils xsltproc zlib1g-dev:i386 libgl1-mesa-glx:i386 libgl1-mesa-dev