MemoryCache.java

package com.bourke.finch.lazylist;

import android.graphics.Bitmap;

import java.lang.ref.SoftReference;

import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

public class MemoryCache {

    private Map<String, SoftReference<Bitmap>> cache =
        Collections.synchronizedMap(
                new HashMap<String, SoftReference<Bitmap>>());

    public Bitmap get(String id) {
        if(!cache.containsKey(id))
            return null;
        SoftReference<Bitmap> ref=cache.get(id);
        return ref.get();
    }

    public void put(String id, Bitmap bitmap){
        cache.put(id, new SoftReference<Bitmap>(bitmap));
    }

    public void clear() {
        cache.clear();
    }
}