com.tz.explore.util.ImageLoader.java Source code

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Here is the source code for com.tz.explore.util.ImageLoader.java

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/**
 * Copyright  YOLANDA. 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 com.tz.explore.util;

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

import com.tz.explore.bean.Messenger;
import com.tz.explore.bean.Messenger.ImageCallback;

/**
 * Created in Aug 2, 2015 4:54:56 PM
 * 
 * @author YOLANDA
 */
public class ImageLoader implements ImageCallback {

    private static ImageLoader _ImageLoader;

    private LruCache<String, Bitmap> cache;

    private ImageLoader() {
        TaskPoster.initPoster();
        int maxSize = (int) (Runtime.getRuntime().maxMemory() / 8);

        cache = new LruCache<String, Bitmap>(maxSize) {
            @Override
            protected int sizeOf(String key, Bitmap value) {
                return value.getRowBytes() * value.getHeight() / 1024;
            }
        };
    }

    public static ImageLoader getInstance() {
        if (_ImageLoader == null) {
            _ImageLoader = new ImageLoader();
        }
        return _ImageLoader;
    }

    public void loadImage(ImageView imageView, String path) {
        Bitmap bitmap = cache.get(path);
        if (bitmap == null) {
            Messenger messenger = new Messenger(imageView, path, imageView.getWidth(), this);
            TaskPoster poster = new TaskPoster(messenger);
            poster.execute();
        } else {
            imageView.setImageBitmap(bitmap);
        }
    }

    @Override
    public void callback(Messenger messenger) {
        cache.put(messenger.getImgPath(), messenger.getmBitmap());
    }

}