R.layout.main error, no solutions have worked

Question

I am just beginning to develop for Android. The tutorial book I am using uses the code below, but, put simply, it does not work. As I've searched for an answer, I find that none of the solutions people say have rid them of this error have worked for me. Here is a list of methods that did not work.

-Cleaning: It just said it couldn't clean until I resolved the error.

-Building the Project: It built it, but the error did not go away.

-Deleting import R: The error did not go away.

-Renaming import R to import me.package.R: The error persisted.

Here is the code that is generating the error.

public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
}

Can anyone help me out?

Answer 1

您的项目可能需要引用一些库jar，由于某些编译问题，由于未正确生成项目的R.java。