Eclipse Upgrade Not Working

My Eclipse out of the blue stopped building my Android so I removed the old version and have installed Indigo. When I try to import an Android project in I get this error:

Errors occurred during the build.
Errors running builder 'Android Resource Manager' on project 'ACCUWX_HoneyComb'.
java.lang.NullPointerException
Errors running builder 'Android Pre Compiler' on project 'ACCUWX_HoneyComb'.
java.lang.NullPointerException
Errors running builder 'Java Builder' on project 'ACCUWX_HoneyComb'.
java.lang.NullPointerException

Please help!

How do I update my Java version in Eclipse?

Click on the Window tab in Eclipse, go to Preferences and when that window comes up, go to Java → Installed JREs → Execution Environment and choose JavaSE-1.5. You then have to go to Compiler and set the Compiler compliance level.

Try removing the .metadata folder from your workspace. This holds all your configurations, even after a new install. I think if you just delete this folder, assuming everything is in place, you should be up and running again.