Android Open Source - Android-Universal-Image-Loader Fade In Bitmap Displayer

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License

The source code is released under:

Apache License

Java Source Code

/*******************************************************************************
 * Copyright 2011-2014 Sergey Tarasevich, Daniel Mart
 */* w w  w .  j a  v  a  2s. co m*/
 * 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.display;

import android.graphics.Bitmap;
import android.view.View;
import android.view.animation.AlphaAnimation;
import android.view.animation.DecelerateInterpolator;
import android.widget.ImageView;
import com.nostra13.universalimageloader.core.assist.LoadedFrom;
import com.nostra13.universalimageloader.core.imageaware.ImageAware;

/**
 * Displays image with "fade in" animation
 *
 * @author Sergey Tarasevich (nostra13[at]gmail[dot]com), Daniel Mart
 * @since 1.6.4
 */
public class FadeInBitmapDisplayer implements BitmapDisplayer {

  private final int durationMillis;

  private final boolean animateFromNetwork;
  private final boolean animateFromDisk;
  private final boolean animateFromMemory;

  /**
   * @param durationMillis Duration of "fade-in" animation (in milliseconds)
   */
  public FadeInBitmapDisplayer(int durationMillis) {
    this(durationMillis, true, true, true);
  }

  /**
   * @param durationMillis     Duration of "fade-in" animation (in milliseconds)
   * @param animateFromNetwork Whether animation should be played if image is loaded from network
   * @param animateFromDisk    Whether animation should be played if image is loaded from disk cache
   * @param animateFromMemory  Whether animation should be played if image is loaded from memory cache
   */
  public FadeInBitmapDisplayer(int durationMillis, boolean animateFromNetwork, boolean animateFromDisk,
                 boolean animateFromMemory) {
    this.durationMillis = durationMillis;
    this.animateFromNetwork = animateFromNetwork;
    this.animateFromDisk = animateFromDisk;
    this.animateFromMemory = animateFromMemory;
  }

  @Override
  public void display(Bitmap bitmap, ImageAware imageAware, LoadedFrom loadedFrom) {
    imageAware.setImageBitmap(bitmap);

    if ((animateFromNetwork && loadedFrom == LoadedFrom.NETWORK) ||
        (animateFromDisk && loadedFrom == LoadedFrom.DISC_CACHE) ||
        (animateFromMemory && loadedFrom == LoadedFrom.MEMORY_CACHE)) {
      animate(imageAware.getWrappedView(), durationMillis);
    }
  }

  /**
   * Animates {@link ImageView} with "fade-in" effect
   *
   * @param imageView      {@link ImageView} which display image in
   * @param durationMillis The length of the animation in milliseconds
   */
  public static void animate(View imageView, int durationMillis) {
    if (imageView != null) {
      AlphaAnimation fadeImage = new AlphaAnimation(0, 1);
      fadeImage.setDuration(durationMillis);
      fadeImage.setInterpolator(new DecelerateInterpolator());
      imageView.startAnimation(fadeImage);
    }
  }
}

Java Source Code List

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