This is a TypefaceSpan with shadow.

ShadowedTypefaceSpan.java

import android.text.TextPaint;
import android.text.style.TypefaceSpan;

/**
 * Created by Furkan Tektas on 15.02.2014.
 */
public class ShadowedTypefaceSpan extends TypefaceSpan {
    private float radius;
    private float dx;
    private float dy;
    private int color;

    public ShadowedTypefaceSpan(String family, float radius, float dx, float dy, int color) {
        super(family);
        this.radius = radius;
        this.dx = dx;
        this.dy = dy;
        this.color = color;
    }

    @Override
    public void updateDrawState(TextPaint ds) {
        super.updateDrawState(ds);
        ds.setShadowLayer(radius, dx, dy, color);
    }
}