R cannot be resolved to a variable , syntax errors in program that was working fine day before

[Sam Acropolis]

Line 15 and 22 complain that

R cannot be resolved to a variable

I have tried removing the

import android.R

statement and even renaming it to import com.HelloWorld.firstandroidproject.R;

but the syntax errors still persist ...

any ideas?


Thanks a bunch everyone

package com.example.firstandroidproject;



import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;


public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        //R.layout.activity_main
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
    
}

[Ulf Dittmer]

You should not have to import anything, it should just work - how are you building the project? The R.java (and R.class) files are generated automatically, and part of the package that's listed in AndroidManifest.xml - which in your case should be "com.example.firstandroidproject", not "com.HelloWorld.firstandroidproject".

[Sam Acropolis]

My package name is as you say it com.example.firstandroidproject;

Im pretty much creating a android virtual device and then attempting to launch it , I have even tried 'cleaning' the project to from the 'project' menu in eclipse.