Question: Any ideas why at times Eclipse frizzles and doesn't recognize code it did seconds ago? The "R" in the code below has the red squiggle under it when it didn't 5 minutes ago and I've change no code. This happens frequently with Eclipse and usually I shut it down and start it again and it's good to go...no go this time.

```
// Initialize view elements
    mSearchBox      = (EditText) this.findViewById(R.id.edittext_search);
    mSearchButton   = (Button) this.findViewById(R.id.button_search);

```

Answer: 
did you accidentally import android.R.\*; by any chance? I imported this one and that makes eclipse not recognize all the other generated R classes, make sure you are importing the one from your project: 

```
import <project_name>.R;

```
Did you add any image files to your drawable folder? Image files with invalid file names can also cause the same issue.