Simple Image cache

ImageCache.java

public class ImageCache implements Map<String, Bitmap> {

    private final Map<String, Bitmap> cache = new HashMap<String, Bitmap>();
    private final Context context;

    public ImageCache(Context context) {
        this.context = context;
    }

    @Override
    public void clear() {
        for (Bitmap bitmap : values()) {
            bitmap.recycle();
        }
        cache.clear();
    }

    @Override
    public boolean containsKey(Object o) {
        return cache.containsKey(o);
    }

    @Override
    public boolean containsValue(Object o) {
        return cache.containsValue(o);
    }

    @Override
    public Set<Entry<String, Bitmap>> entrySet() {
        return cache.entrySet();
    }

    @Override
    public boolean equals(Object o) {
        return cache.equals(o);
    }

    @Override
    public Bitmap get(Object o) {
        return cache.get(o);
    }

    @Override
    public int hashCode() {
        return cache.hashCode();
    }

    @Override
    public boolean isEmpty() {
        return cache.isEmpty();
    }

    @Override
    public Set<String> keySet() {
        return cache.keySet();
    }

    @Override
    public Bitmap put(String s, Bitmap bitmap) {
        return cache.put(s, bitmap);
    }

    @Override
    public void putAll(Map<? extends String, ? extends Bitmap> map) {
        cache.putAll(map);
    }

    @Override
    public Bitmap remove(Object o) {
        return cache.remove(o);
    }

    @Override
    public int size() {
        return cache.size();
    }

    @Override
    public Collection<Bitmap> values() {
        return cache.values();
    }
}