src/com/android/gallery3d/filtershow/mediapicker/imageloader/ImageDisplayTask.java

/*
 * Copyright (c) 2016, The Linux Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
 *   * Neither the name of The Linux Foundation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package com.android.gallery3d.filtershow.mediapicker.imageloader;

import android.graphics.Bitmap;
import android.util.Log;

final class ImageDisplayTask implements Runnable {

    private static final String TAG = "ImageDisplayTask";

    private final Bitmap bitmap;
    private final ImageViewImpl imageView;
    private final String memoryCacheKey;
    private final ImageLoaderHandle handle;

    public ImageDisplayTask(Bitmap bitmap, ImageLoaderInfo imageLoadingInfo,
                            ImageLoaderHandle handle) {
        this.bitmap = bitmap;
        imageView = imageLoadingInfo.imageView;
        memoryCacheKey = imageLoadingInfo.memoryCacheKey;
        this.handle = handle;
    }

    @Override
    public void run() {
        if (imageView.isRecyled()) {
            Log.d(TAG, "Image was recyled by GC. Task is cancelled. " + memoryCacheKey);
        } else if (isViewWasReused()) {
            Log.d(TAG, "Image is reused for another image. Task is cancelled. " + memoryCacheKey);
        } else {
            Log.d(TAG, "Display image in ImageAware (loaded from " + memoryCacheKey);
            imageView.setImageBitmap(bitmap);
            handle.cacheKeysForImageAwares.remove(imageView.getId());
        }
    }

    private boolean isViewWasReused() {
        String currentCacheKey = handle.cacheKeysForImageAwares.get(imageView.getId());
        return !memoryCacheKey.equals(currentCacheKey);
    }
}