cmu.cconfs.instantMessage.utils.ImageCache.java Source code

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Here is the source code for cmu.cconfs.instantMessage.utils.ImageCache.java

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/**
 * Copyright (C) 2013-2014 EaseMob Technologies. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package cmu.cconfs.instantMessage.utils;

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

public class ImageCache {

    private ImageCache() {
        // use 1/8 of available heap size
        cache = new LruCache<String, Bitmap>((int) (Runtime.getRuntime().maxMemory() / 8)) {
            @Override
            protected int sizeOf(String key, Bitmap value) {
                return value.getRowBytes() * value.getHeight();
            }
        };
    }

    private static ImageCache imageCache = null;

    public static synchronized ImageCache getInstance() {
        if (imageCache == null) {
            imageCache = new ImageCache();
        }
        return imageCache;

    }

    private LruCache<String, Bitmap> cache = null;

    /**
     * put bitmap to image cache
     * @param key
     * @param value
     * @return  the puts bitmap
     */
    public Bitmap put(String key, Bitmap value) {
        return cache.put(key, value);
    }

    /**
     * return the bitmap
     * @param key
     * @return
     */
    public Bitmap get(String key) {
        return cache.get(key);
    }
}