Why arent my new resources added in the res/ sub-folders showing up in the R class?

I don't understand why Eclipse doesn't know how to resolve the color resources I've defined. Am I doing something wrong?

R.color.notepad_lines cannot be resolved MyNewTextView.java

I've had problems before too with eclipse being able to find images in my /res/drawable directory

/res/values/colors.xml

<?xml version="1.0" encoding="utf-8"?>
<res开发者_如何学Cources>
 <color name="notepad_paper">#AAFFFF99</color>
 <color name="notepad_lines">#FF0000FF</color>
 <color name="notepad_margin">#90FF0000</color>
 <color name="notepad_text">#AA0000FF</color>
</resources>

MyNewTextView.java

...
 private Paint marginPaint;
 private Paint linePaint;
 private int paperColor;
 private float margin; 


 private void init(){
  //Get Reference to Resource Table
  Resources myRes = getResources();

  //Create paint brushes
  marginPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
  marginPaint.setColor(myRes.getColor(R.color.notepad_margin));

  linePaint = new Paint(Paint.ANTI_ALIAS_FLAG);
  linePaint.setColor(myRes.getColor(R.color.notepad_lines));

  paperColor = myRes.getColor(R.color.notepad_paper);
  margin = myRes.getDimension(R.dimen.notepad_margin);
 }

...

Eclipse keeps saying it can't find any of the R.* resources =/

R.java

public final class R {
    public static final class attr {
    }

public static final class color {
    public static final int notepad_lines=0x7f040001;
    public static final int notepad_margin=0x7f040002;
    public static final int notepad_paper=0x7f040000;
    public static final int notepad_text=0x7f040003;
}
public static final class dimen {
    public static final int notepad_margin=0x7f050000;
}
public static final class drawable {
    public static final int ic_menu_add=0x7f020000;
    public static final int ic_menu_cut=0x7f020001;
    public static final int ic_menu_king=0x7f020002;
    public static final int icon=0x7f020003;
}
...

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I've had this problem too, unless I let Eclipse create the file, rather that drop the XML file in under res/ somewhere. But I just found a way around this: In the Project Explorer view, find the res/values directory and select refresh from the right click menu:

colors.xml now appears in the explorer, and the R.java now contains the R.color class. Rebuild it you don't auto-rebuild.

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Ensure you are not importing the provided android Resource class 'import android.R' but your own generated Resource class e.g. import .R

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This may be a stupid suggestion but... Is MyNewTextView.java in the same package name as the R.java file? If not, then you need to add a reference to the package via an import statement.

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Delete the R.java file in the gen folder...