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Android Build a Simple Android App (2014) Basic Android Programming Generating a Random Number

Random Fonts?

I am looking to create a Random so every time a new fact appears it also has a different font but i cant figure it out was hoping someone might be able to point me in the correct direction. i currently have the following:

import android.graphics.Typeface;

import java.util.Random; public class FontsBook extends Typeface {

public String getFonts() {

    String[] mFonts = {
            "fonts/waltograph42.otf",
            "fonts/Disneyland.ttf",
            "fonts/Incredibles.ttf",
            "fonts/Monster AG",
            "fonts/MORPHEUS.TTF",
            "fonts/mulan.ttf",
            "fonts/RAPSCALL.TTF",
            "fonts/Tangled.ttf",
            "fonts/aladdin.ttf"};


    String font = "";

    Random randomGenerator = new Random();
    int randomNumber = randomGenerator.nextInt(mFonts.length);

    font = mFonts[randomNumber];

    return font;
}

}

the line public class FontsBook extends Typeface { is showing 'there is no default constructor available in android.graphics.Typeface.