Android Open Source - Android-Universal-Image-Loader Display Bitmap Task

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License

The source code is released under:

Apache License

Java Source Code

/*******************************************************************************
 * Copyright 2011-2014 Sergey Tarasevich
 */*from   www  .j a va2s. c om*/
 * 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.nostra13.universalimageloader.core;

import android.graphics.Bitmap;
import com.nostra13.universalimageloader.core.assist.LoadedFrom;
import com.nostra13.universalimageloader.core.display.BitmapDisplayer;
import com.nostra13.universalimageloader.core.imageaware.ImageAware;
import com.nostra13.universalimageloader.core.listener.ImageLoadingListener;
import com.nostra13.universalimageloader.utils.L;

/**
 * Displays bitmap in {@link com.nostra13.universalimageloader.core.imageaware.ImageAware}. Must be called on UI thread.
 *
 * @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
 * @see ImageLoadingListener
 * @see BitmapDisplayer
 * @since 1.3.1
 */
final class DisplayBitmapTask implements Runnable {

  private static final String LOG_DISPLAY_IMAGE_IN_IMAGEAWARE = "Display image in ImageAware (loaded from %1$s) [%2$s]";
  private static final String LOG_TASK_CANCELLED_IMAGEAWARE_REUSED = "ImageAware is reused for another image. Task is cancelled. [%s]";
  private static final String LOG_TASK_CANCELLED_IMAGEAWARE_COLLECTED = "ImageAware was collected by GC. Task is cancelled. [%s]";

  private final Bitmap bitmap;
  private final String imageUri;
  private final ImageAware imageAware;
  private final String memoryCacheKey;
  private final BitmapDisplayer displayer;
  private final ImageLoadingListener listener;
  private final ImageLoaderEngine engine;
  private final LoadedFrom loadedFrom;

  public DisplayBitmapTask(Bitmap bitmap, ImageLoadingInfo imageLoadingInfo, ImageLoaderEngine engine,
      LoadedFrom loadedFrom) {
    this.bitmap = bitmap;
    imageUri = imageLoadingInfo.uri;
    imageAware = imageLoadingInfo.imageAware;
    memoryCacheKey = imageLoadingInfo.memoryCacheKey;
    displayer = imageLoadingInfo.options.getDisplayer();
    listener = imageLoadingInfo.listener;
    this.engine = engine;
    this.loadedFrom = loadedFrom;
  }

  @Override
  public void run() {
    if (imageAware.isCollected()) {
      L.d(LOG_TASK_CANCELLED_IMAGEAWARE_COLLECTED, memoryCacheKey);
      listener.onLoadingCancelled(imageUri, imageAware.getWrappedView());
    } else if (isViewWasReused()) {
      L.d(LOG_TASK_CANCELLED_IMAGEAWARE_REUSED, memoryCacheKey);
      listener.onLoadingCancelled(imageUri, imageAware.getWrappedView());
    } else {
      L.d(LOG_DISPLAY_IMAGE_IN_IMAGEAWARE, loadedFrom, memoryCacheKey);
      displayer.display(bitmap, imageAware, loadedFrom);
      engine.cancelDisplayTaskFor(imageAware);
      listener.onLoadingComplete(imageUri, imageAware.getWrappedView(), bitmap);
    }
  }

  /** Checks whether memory cache key (image URI) for current ImageAware is actual */
  private boolean isViewWasReused() {
    String currentCacheKey = engine.getLoadingUriForView(imageAware);
    return !memoryCacheKey.equals(currentCacheKey);
  }
}

Java Source Code List

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