RawTypeface.java

package com.jasonrobinson.racer.util;

import android.content.Context;
import android.graphics.Typeface;
import android.support.v4.util.LruCache;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class RawTypeface {

    private static LruCache<Integer, Typeface> sTypefaceCache = new LruCache<Integer, Typeface>(5);

    private RawTypeface() {

    }

    public static Typeface obtain(Context context, int resId) {
        Typeface typeface = sTypefaceCache.get(resId);
        if (typeface == null) {
            String outPath = context.getCacheDir() + File.separator + resId + ".raw";

            File outFile = new File(outPath);
            if (!outFile.exists()) {
                try {
                    copyToFile(context, resId, outFile);
                } catch (IOException e) {
                    return null;
                }
            }

            typeface = Typeface.createFromFile(outFile);
            outFile.delete();

            sTypefaceCache.put(resId, typeface);
        }

        return typeface;
    }

    private static void copyToFile(Context context, int resId, File outFile) throws IOException {
        InputStream is = context.getResources().openRawResource(resId);

        byte[] buffer = new byte[is.available()];
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(outFile));

        try {
            int read = 0;
            while ((read = is.read(buffer)) > 0) {
                bos.write(buffer, 0, read);
            }
        } finally {
            bos.close();
            is.close();
        }
    }
}