Android API Target Level 5 and 6 for Ubuntu

Today i installed Ubuntu 10.4 and Eclipse Galileo. Then I downloaded the Android SDK and tried to install all packages via the Android SDK Tools. But unfortunately, only the Target Levels 3, 4, 7 and 8 were available. API Level 5 and 6 are missing.

Does anybody know the reason for this? I already did a 开发者_JS百科Google search and there seems to be nobody with the same problem. I also tried to restart it and nothing happens, the API Levels are still missing.

Does anybody know the reason for this?

They are deprecated and generally unnecessary. Android 2.0 and 2.0.1 are used on approximately 0.4% of Android production devices.

That being said, uncheck "Display updates only" in the Available Packages area of the Android SDK and AVD Manager, and you will see them.