Eclipse: Java Build Path Is Missing

I'm trying to use Google's SDK Tutorial for Android using Eclipse. I was able to get the first two projects to work, but when running the third R.java disappeared so I gave up on

Solution 1:

Please check your Window>Preference>Android>sdk location --- is set to be the path of android sdk and if it not works then please go with new eclipse software delete previous check jdk is install and after that set correct android sdk location to above path.

Thanks

Solution 2:

If the first two projects still work, then your studio is probably deployed properly.

You might want to check if you have a build target set.

Right click on project->android->target name.

Otherwise, might make sense to re-download eclipse and reinstall the google adt plugin.