'R cannot be resolved to a variable' - gen folder is empty

Question

I\'ve got an error:

R cannot be resolved to a variable

in line:

setContentView(R.layout.main);

but I can\'t r

Answer 1

Try this:

1. First disable automatic build option from Project>Build Automatically
2. Change eclipse work space
3. Create a new Hello World test project
4. Comment setContentView(R.layout.main);
5. Build project manually by right click on your project in eclipse>Build project
6. Check whether R.java in gen folder has been generated
7. If yes, then uncomment setContentView(R.layout.main);
8. Now build project again manually and run

This should resolve the problem hopefully.