BitmapLruCache.java

package ph.com.voyager.epg.core.model.volley;

import com.android.volley.toolbox.ImageLoader;

import android.graphics.Bitmap;
import android.support.v4.util.LruCache;

/**
 * A straightforward implementation of the {@link ImageLoader.ImageCache ImageCache} in LruCache
 * provided by Android + Support Library.
 *
 * Originally written by Ficus Kirkpatrick: https://gist.github.com/ficusk/5614325
 *
 * @author jerieljan
 */
public class BitmapLruCache extends LruCache<String, Bitmap> implements ImageLoader.ImageCache {

    /**
     * Creates a new BitmapLruCache with the default cache size.
     */
    public BitmapLruCache() {
        this(getDefaultLruCacheSize());
    }

    /**
     * Creates a new BitmapLruCache with a defined amount of KB on memory.
     */
    public BitmapLruCache(int sizeInKiloBytes) {
        super(sizeInKiloBytes);
    }

    /**
     * Retrieves the default LruCache size.
     *
     * The value is based on 1/8 of the devices' maximum memory.
     */
    public static int getDefaultLruCacheSize() {
        final int maxMemory = (int) (Runtime.getRuntime().maxMemory() / 1024);
        final int cacheSize = maxMemory / 8;

        return cacheSize;
    }

    @Override
    protected int sizeOf(String key, Bitmap value) {
        return value.getRowBytes() * value.getHeight() / 1024;
    }

    @Override
    public Bitmap getBitmap(String url) {
        return get(url);
    }

    @Override
    public void putBitmap(String url, Bitmap bitmap) {
        put(url, bitmap);
    }
}