[Solved]Package sun-java6-jdk is not available, but is referred to by another package.

Problem: Package sun-java6-jdk is not available, but is referred to by another package.

Reason: The sun-java6-jdk is no longer in ubuntu's main repository, or in canonical-archive repository, (which you are suggested on Android website.)

Solution: Use ppa

Command:

                   sudo add-apt-repository ppa:ferramroberto/java
                   sudo apt-get update
                   sudo apt-get install sun-java6-jdk

Switch between different versions of jdk
                   sudo update-alternatives --config java

Then choose the one you'd like.

Enjoy!