Basic Font setter

FontManager.java

package com.levelup.touiteur;

import android.graphics.Typeface;
import android.util.SparseArray;
import android.widget.TextView;

import com.levelup.touiteur.log.TouiteurLog;

public class FontManager {

	public enum Font {
		roboto,
		robotoLight,
		robotoSlab,
		robotoBold,
		robotoMedium,
	}

	private final SparseArray<Typeface> mFonts = new SparseArray<Typeface>(5);

	/**
	 * Do not call directly, use {@link Touiteur#getFontManager()}
	 */
	public FontManager() {
	}

	public Typeface getFont(Font font) {
		if (!UserPreferences.getInstance().getBoolean(UserPreferences.UseSystemFont)) {
			// add the font from storage as we're not going to use it
			Typeface result = mFonts.get(font.ordinal(), null);
			if (null==result) {
				result = loadFont(font);
				mFonts.append(font.ordinal(), result);
			}
			return result;
		} else {
			// remove the font from storage as we're not going to use it
			mFonts.remove(font.ordinal());
		}

		return null;
	}

	private Typeface loadFont(Font font) {
		final String fontPath;
		switch (font) {
		case roboto:
			fontPath = "fonts/Roboto-Regular.ttf";
			break;
		case robotoLight:
			fontPath = "fonts/Roboto-Light.ttf";
			break;
		case robotoBold:
			fontPath = "fonts/Roboto-Bold.ttf";
			break;
		case robotoSlab:
			fontPath = "fonts/RobotoSlab-Regular.ttf";
			break;
		case robotoMedium:
			fontPath = "fonts/Roboto-Medium.ttf";
			break;
		default:
			fontPath = null;
			break;
		}

		if (null!=fontPath)
			try {
				return Typeface.createFromAsset(Touiteur.sApp.getAssets(), fontPath);
			} catch (Exception e) {
				TouiteurLog.e(false, "Error creating font "+fontPath, e);
			}

		final String systemName = getDefaultName(font);
		if (null!=systemName)
			try {
				return Typeface.create(systemName, Typeface.NORMAL);
			} catch (Exception e) {
				TouiteurLog.e(false, "Error creating font "+systemName, e);
			}


		return null;
	}


	public void setTypeface(Font font, TextView textview) {
		final Typeface tf = getFont(font);
		if (null!=tf && null!=textview)
			textview.setTypeface(tf);
	}

	public static String getDefaultName(Font font) {
		switch (font) {
		case roboto:
			return "sans-serif";
		case robotoLight:
			return "sans-serif-light";
		case robotoBold:
			return "sans-serif-bold";
		case robotoSlab:
			return "sans-serif";
		case robotoMedium:
			return "sans-serif-medium";
		default:
			return null;
		}
	}
}