Android Load Your String Resources Programmatically

How do I Load Your String Resources Programmatically from a Class file and not an Activity:

this is in my Strings.xml

    <!-- FactBook Resource -->
    <string-array name="facts">
        <item>facts 1</item>
        <item>facts 2</item>
...
    </string-array>

Here my Class File

public class FactBook {

    public String[] mFacts;

    mFacts = getResources().getStringArray(R.array.facts);

    public String getFact() {

        String fact = "";

        // Randomly select a fact
        Random randomGenerator = new Random();  
        int randomNumber = randomGenerator.nextInt(mFacts.length);

        fact = mFacts[randomNumber];

        return fact;
    }
}

I get a erro. - Invalid Method declaration, return type required.