R.layout.main cannot be resolved

Question

Using Eclipse on win XP. I've previously created an app or 2, but am now working on the 'real' version and get the above error.

I was having funnies creating a 1.5 version, so have started a new project for 2.1.

package xxx.guest;

import android.R;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;

public class briefme extends Activity {

 private String strURL;
           ........
           ........ 

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

Project as below (note I've removed some names for confidentiality reasons!)

Any ideas what's gone wrong?

Thanks,

Martin.

Project screenshot here

Answer 1

I would try refreshing. If that doesn't work, close and open the project.

If those two fail, delete and re-create R (it should auto-generate -- copy it just to be on the safe side).

I've had this happen to me a few times and those are the three things I usually do to fix the error.

Also try changing your import:

import android.R;

to:

import your.package.R;

Answer 2

In my case this happened because their was a layout resource with upper case letters in the file name. Resources weren't compiled because of the error and because of that the R class was missing.