FontTextView.java

package com.cusnews.widgets;

import java.util.concurrent.ConcurrentHashMap;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Typeface;
import android.util.AttributeSet;
import android.widget.TextView;

import com.cusnews.R;


/**
 * A TextView that allows a custom font to be defined in a layout. The font must be in the assets folder. <a
 * href="http://stackoverflow.com/questions/2376250/custom-fonts-and-xml-layouts-android">Stackoverflow</a>
 */
public class FontTextView extends TextView {
	public FontTextView( Context context ) {
		super( context );
	}

	public FontTextView( Context context, AttributeSet attrs ) {
		super( context, attrs );
		initialize( context, attrs );
	}

	public FontTextView( Context context, AttributeSet attrs, int defStyle ) {
		super( context, attrs, defStyle );
		initialize( context, attrs );
	}

	private void initialize( Context context, AttributeSet attrs ) {
		String font;

		TypedArray a         = context.obtainStyledAttributes( attrs, R.styleable.FontButton );
		int        fontIndex = a.getInt( R.styleable.FontButton_font, -1 );

		// defined in attrs_fontui.xml
		switch( fontIndex ) {
			case 1:
				font = Fonts.FONT_CN;
				break;
			default:
				font = Fonts.FONT_BOLD_CN;
				break;
		}

		a.recycle();

		if( font != null ) {
			setFont( font );
		}
	}

	public void setFont( String font ) {
		if( !isInEditMode() ) {
			Typeface tf = Fonts.getFont( getContext(), font );
			setTypeface( tf );
		}
	}

	/**
	 * A cache for Fonts. Works around a known memory leak in <code>Typeface.createFromAsset</code>.
	 * <p/>
	 * <a href="http://code.google.com/p/android/issues/detail?id=9904">Google Code</a>
	 */
	public final static class Fonts {
		private static final ConcurrentHashMap<String, Typeface> sTypefaces = new ConcurrentHashMap<String, Typeface>();

		public static final String FONT_CN      = "NotoSerif-Regular.ttf";
		public static final String FONT_BOLD_CN = "NotoSerif-Bold.ttf";

		public static Typeface getFont( Context context, String assetPath ) {
			Typeface font = sTypefaces.get( assetPath );
			if( font == null ) {
				font = Typeface.createFromAsset( context.getAssets(), "fonts/" + assetPath );
				sTypefaces.put( assetPath, font );
			}
			return font;
		}

	}
}