FontFactory - improve performance when using custom fonts

FontFactory.java

import java.util.HashMap;

import android.content.Context;
import android.graphics.Typeface;
import android.util.Log;

/**
 * Manage font
 * @author Olivier Demolliens. @odemolliens
 */
public class FontFactory {
	private static FontFactory instance;
	private HashMap<String, Typeface> fontMap = new HashMap<String, Typeface>();
	private Context context;

	private FontFactory(Context context) {
		this.context = context.getApplicationContext();
	}

	public static FontFactory getInstance(Context context) {
		if(instance == null){
			return instance = new FontFactory(context);
		} else {
			return instance;
		}
	}

	public Typeface getFont(String font) {
		Typeface typeface = fontMap.get(font);
		if (typeface == null) {
			try {
				typeface = Typeface.createFromAsset(context.getResources().getAssets(), "fonts/" + font);
				fontMap.put(font, typeface);  
			} catch (Exception e) {
				Log.e("FontFactory", "Could not get typeface: " + e.getMessage() + " with name: " + font);
				return null;
			}

		}
		return typeface;
	}
}