I was building an android source code on Ubuntu and got the following error during build process.

Java: CtsVerifier
(out/target/common/obj/APPS/CtsVerifier_intermediates/classes)
cts/apps/CtsVerifier/src/com/android/cts/verifier/PassFailButtons.java:
191:
onCreateDialog(int,android.os.Bundle) in android.app.Activity
cannot implement onCreateDialog(int,android.os.Bundle)
in com.android.cts.verifier.PassFailButtons.PassFailActivity;
attempting to assign weaker access privileges;
was public private static

I searched many forums and found that the reason the error coming because I have installed open jdk on Ubuntu 11.10 and to fix this issue I need to install the sun jdk(1.6), so I tried aptitude search for sun jdk in Ubuntu but no such package was present in the repository.

I found two ways to fix this issue. One is specific Ubuntu(easy and simple) and other is applicable for all other Linux operating systems including Ubuntu as well.

Installing Sun Jdk on Ubuntu

Add following repository

sudo add-apt-repository ppa:ferramroberto/java

Install sun jdk 1.6

sudo apt-get update
sudo apt-get install sun-java6-jdk

Install sun jre 1.6

sudo apt-get update
sudo apt-get install sun-java6-jre sun-java6-plugin

If you have already installed openJdk then you have to choose default java from preference, execute following command.
sudo update-alternatives --config javac

Done!

Installing sun jdk on Linux or Ubuntu

You will need to install jdk 6 if you are building android source code. I am mentioning steps to install jdk 7 and jdk 6 separately, most of the steps similar except the extracting the tar or bin file.

Installing jdk 7 on Linux/Ubuntu

Download the jdk 7 tar from here.

Extract the tar

tar -xvzf jdk-7u1-linux-i586.tar.gz

Move extracted folder to this location

sudo mv jdk1.7.0_ /usr/lib/jvm/

Inform Linux/ubuntu that new java source is available

sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0_/bin/javac 1
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7.0_/bin/java 1

Choose default java(jdk 1.7) on ubuntu/linux

sudo update-alternatives --config javac
sudo update-alternatives --config java

Installing jdk 6 on Linux/Ubuntu

Download the jdk 6 bin from here.

Extract the bin

chmod +x jdk-6u29-linux-i586.bin
./jdk-6u29-linux-i586.bin

Move extracted folder to this location

sudo mv jdk1.6.0_29 /usr/lib/jvm/

Inform Linux/ubuntu that new java source is available

sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.6.0_29/bin/javac 1
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.6.0_29/bin/java 1

Choose default java(jdk 1.6) on ubuntu/linux

sudo update-alternatives --config javac
sudo update-alternatives --config java

Please leave the comment if you get any difficulties to install sun jdk after following these steps.