ImageCache.java

package uni.projecte.dataLayer.dataStructures;

import android.app.ActivityManager;
import android.content.Context;
import android.graphics.Bitmap;
import android.support.v4.util.LruCache;

/*
 *  From developer Android: Caching Bitmaps
 * 		http://developer.android.com/training/displaying-bitmaps/cache-bitmap.html
 * 
 */

public class ImageCache {

	/* Lruw Cache for caching bitmaps */
	private LruCache<String, Bitmap> mMemoryCache;

	public ImageCache(Context baseContext) {

		final int memClass = ((ActivityManager) baseContext
				.getSystemService(Context.ACTIVITY_SERVICE)).getMemoryClass();

		// Use 1/8th of the available memory for this memory cache.
		final int cacheSize = 1024 * 1024 * memClass / 8;

		mMemoryCache = new LruCache<String, Bitmap>(cacheSize) {

			protected int sizeOf(String key, Bitmap bitmap) {
				// The cache size will be measured in bytes rather than number
				// of items.
				return bitmap.getHeight() * bitmap.getWidth() * 4;
			}

		};

	}

	/* Lte Cache method */

	public void addBitmapToMemoryCache(String key, Bitmap bitmap) {
		if (getBitmapFromMemCache(key) == null) {
			mMemoryCache.put(key, bitmap);
		}
	}

	public Bitmap getBitmapFromMemCache(String key) {
		return mMemoryCache.get(key);
	}

	public int getSize() {

		return mMemoryCache.size();

	}

	public int getMaxSize() {

		return mMemoryCache.maxSize();

	}

}