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/*******************************************************************************
* Copyright 2011-2013 Sergey Tarasevich
*
* 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 android.text.TextUtils;
import android.view.View;
import android.widget.ImageView;
import com.nostra13.universalimageloader.cache.disc.DiscCacheAware;
import com.nostra13.universalimageloader.cache.memory.MemoryCacheAware;
import com.nostra13.universalimageloader.core.assist.*;
import com.nostra13.universalimageloader.core.imageaware.ImageAware;
import com.nostra13.universalimageloader.core.imageaware.ImageNonViewAware;
import com.nostra13.universalimageloader.core.imageaware.ImageViewAware;
import com.nostra13.universalimageloader.utils.ImageSizeUtils;
import com.nostra13.universalimageloader.utils.L;
/**
* Singletone for image loading and displaying at {@link ImageView ImageViews}
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before any other method.
*
* @author Sergey Tarasevich (nostra13[at]gmail[dot]com)
* @since 1.0.0
*/
public class ImageLoader {
public static final String TAG = ImageLoader.class.getSimpleName();
static final String LOG_INIT_CONFIG = "Initialize ImageLoader with configuration";
static final String LOG_DESTROY = "Destroy ImageLoader";
static final String LOG_LOAD_IMAGE_FROM_MEMORY_CACHE = "Load image from memory cache [%s]";
private static final String WARNING_RE_INIT_CONFIG = "Try to initialize ImageLoader which had already been initialized before. " + "To re-init ImageLoader with new configuration call ImageLoader.destroy() at first.";
private static final String ERROR_WRONG_ARGUMENTS = "Wrong arguments were passed to displayImage() method (ImageView reference must not be null)";
private static final String ERROR_NOT_INIT = "ImageLoader must be init with configuration before using";
private static final String ERROR_INIT_CONFIG_WITH_NULL = "ImageLoader configuration can not be initialized with null";
private ImageLoaderConfiguration configuration;
private ImageLoaderEngine engine;
private final ImageLoadingListener emptyListener = new SimpleImageLoadingListener();
private volatile static ImageLoader instance;
/** Returns singleton class instance */
public static ImageLoader getInstance() {
if (instance == null) {
synchronized (ImageLoader.class) {
if (instance == null) {
instance = new ImageLoader();
}
}
}
return instance;
}
protected ImageLoader() {
}
/**
* Initializes ImageLoader instance with configuration.
* If configurations was set before ( {@link #isInited()} == true) then this method does nothing.
* To force initialization with new configuration you should {@linkplain #destroy() destroy ImageLoader} at first.
*
* @param configuration {@linkplain ImageLoaderConfiguration ImageLoader configuration}
* @throws IllegalArgumentException if configuration parameter is null
*/
public synchronized void init(ImageLoaderConfiguration configuration) {
if (configuration == null) {
throw new IllegalArgumentException(ERROR_INIT_CONFIG_WITH_NULL);
}
if (this.configuration == null) {
if (configuration.writeLogs) L.d(LOG_INIT_CONFIG);
engine = new ImageLoaderEngine(configuration);
this.configuration = configuration;
} else {
L.w(WARNING_RE_INIT_CONFIG);
}
}
/**
* Returns true - if ImageLoader {@linkplain #init(ImageLoaderConfiguration) is initialized with
* configuration}; false - otherwise
*/
public boolean isInited() {
return configuration != null;
}
/**
* Adds display image task to execution pool. Image will be set to ImageAware when it's turn.
* Default {@linkplain DisplayImageOptions display image options} from {@linkplain ImageLoaderConfiguration
* configuration} will be used.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param imageAware {@linkplain com.nostra13.universalimageloader.core.imageaware.ImageAware Image aware view}
* which should display image
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
* @throws IllegalArgumentException if passed imageAware is null
*/
public void displayImage(String uri, ImageAware imageAware) {
displayImage(uri, imageAware, null, null);
}
/**
* Adds display image task to execution pool. Image will be set to ImageAware when it's turn.
* Default {@linkplain DisplayImageOptions display image options} from {@linkplain ImageLoaderConfiguration
* configuration} will be used.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param imageAware {@linkplain com.nostra13.universalimageloader.core.imageaware.ImageAware Image aware view}
* which should display image
* @param listener {@linkplain ImageLoadingListener Listener} for image loading process. Listener fires events on UI
* thread.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
* @throws IllegalArgumentException if passed imageAware is null
*/
public void displayImage(String uri, ImageAware imageAware, ImageLoadingListener listener) {
displayImage(uri, imageAware, null, listener);
}
/**
* Adds display image task to execution pool. Image will be set to ImageAware when it's turn.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param imageAware {@linkplain com.nostra13.universalimageloader.core.imageaware.ImageAware Image aware view}
* which should display image
* @param options {@linkplain com.nostra13.universalimageloader.core.DisplayImageOptions Options} for image
* decoding and displaying. If null - default display image options
* {@linkplain ImageLoaderConfiguration.Builder#defaultDisplayImageOptions(DisplayImageOptions) from
* configuration} will be used.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
* @throws IllegalArgumentException if passed imageAware is null
*/
public void displayImage(String uri, ImageAware imageAware, DisplayImageOptions options) {
displayImage(uri, imageAware, options, null);
}
/**
* Adds display image task to execution pool. Image will be set to ImageAware when it's turn.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param imageAware {@linkplain com.nostra13.universalimageloader.core.imageaware.ImageAware Image aware view}
* which should display image
* @param options {@linkplain com.nostra13.universalimageloader.core.DisplayImageOptions Options} for image
* decoding and displaying. If null - default display image options
* {@linkplain ImageLoaderConfiguration.Builder#defaultDisplayImageOptions(DisplayImageOptions) from
* configuration} will be used.
* @param listener {@linkplain ImageLoadingListener Listener} for image loading process. Listener fires events on UI
* thread.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
* @throws IllegalArgumentException if passed imageAware is null
*/
public void displayImage(String uri, ImageAware imageAware, DisplayImageOptions options,
ImageLoadingListener listener) {
checkConfiguration();
if (imageAware == null) {
throw new IllegalArgumentException(ERROR_WRONG_ARGUMENTS);
}
if (listener == null) {
listener = emptyListener;
}
if (options == null) {
options = configuration.defaultDisplayImageOptions;
}
if (TextUtils.isEmpty(uri)) {
engine.cancelDisplayTaskFor(imageAware);
listener.onLoadingStarted(uri, imageAware.getWrappedView());
if (options.shouldShowImageForEmptyUri()) {
imageAware.setImageDrawable(options.getImageForEmptyUri(configuration.resources));
} else {
imageAware.setImageDrawable(null);
}
listener.onLoadingComplete(uri, imageAware.getWrappedView(), null);
return;
}
ImageSize targetSize = ImageSizeUtils.defineTargetSizeForView(imageAware, configuration.getMaxImageSize());
String memoryCacheKey = MemoryCacheUtil.generateKey(uri, targetSize);
engine.prepareDisplayTaskFor(imageAware, memoryCacheKey);
listener.onLoadingStarted(uri, imageAware.getWrappedView());
Bitmap bmp = configuration.memoryCache.get(memoryCacheKey);
if (bmp != null && !bmp.isRecycled()) {
if (configuration.writeLogs) L.d(LOG_LOAD_IMAGE_FROM_MEMORY_CACHE, memoryCacheKey);
if (options.shouldPostProcess()) {
ImageLoadingInfo imageLoadingInfo = new ImageLoadingInfo(uri, imageAware, targetSize, memoryCacheKey, options, listener, engine
.getLockForUri(uri));
ProcessAndDisplayImageTask displayTask = new ProcessAndDisplayImageTask(engine, bmp, imageLoadingInfo, options
.getHandler());
if (options.isSyncLoading()) {
displayTask.run();
} else {
engine.submit(displayTask);
}
} else {
bmp = options.getDisplayer().display(bmp, imageAware, LoadedFrom.MEMORY_CACHE);
listener.onLoadingComplete(uri, imageAware.getWrappedView(), bmp);
}
} else {
if (options.shouldShowImageOnLoading()) {
imageAware.setImageDrawable(options.getImageOnLoading(configuration.resources));
} else if (options.isResetViewBeforeLoading()) {
imageAware.setImageDrawable(null);
}
ImageLoadingInfo imageLoadingInfo = new ImageLoadingInfo(uri, imageAware, targetSize, memoryCacheKey, options, listener, engine
.getLockForUri(uri));
LoadAndDisplayImageTask displayTask = new LoadAndDisplayImageTask(engine, imageLoadingInfo, options
.getHandler());
if (options.isSyncLoading()) {
displayTask.run();
} else {
engine.submit(displayTask);
}
}
}
/**
* Adds display image task to execution pool. Image will be set to ImageView when it's turn.
* Default {@linkplain DisplayImageOptions display image options} from {@linkplain ImageLoaderConfiguration
* configuration} will be used.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param imageView {@link ImageView} which should display image
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
* @throws IllegalArgumentException if passed imageView is null
*/
public void displayImage(String uri, ImageView imageView) {
displayImage(uri, new ImageViewAware(imageView), null, null);
}
/**
* Adds display image task to execution pool. Image will be set to ImageView when it's turn.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param imageView {@link ImageView} which should display image
* @param options {@linkplain com.nostra13.universalimageloader.core.DisplayImageOptions Options} for image
* decoding and displaying. If null - default display image options
* {@linkplain ImageLoaderConfiguration.Builder#defaultDisplayImageOptions(DisplayImageOptions) from
* configuration} will be used.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
* @throws IllegalArgumentException if passed imageView is null
*/
public void displayImage(String uri, ImageView imageView, DisplayImageOptions options) {
displayImage(uri, new ImageViewAware(imageView), options, null);
}
/**
* Adds display image task to execution pool. Image will be set to ImageView when it's turn.
* Default {@linkplain DisplayImageOptions display image options} from {@linkplain ImageLoaderConfiguration
* configuration} will be used.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param imageView {@link ImageView} which should display image
* @param listener {@linkplain ImageLoadingListener Listener} for image loading process. Listener fires events on UI
* thread.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
* @throws IllegalArgumentException if passed imageView is null
*/
public void displayImage(String uri, ImageView imageView, ImageLoadingListener listener) {
displayImage(uri, new ImageViewAware(imageView), null, listener);
}
/**
* Adds display image task to execution pool. Image will be set to ImageView when it's turn.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param imageView {@link ImageView} which should display image
* @param options {@linkplain com.nostra13.universalimageloader.core.DisplayImageOptions Options} for image
* decoding and displaying. If null - default display image options
* {@linkplain ImageLoaderConfiguration.Builder#defaultDisplayImageOptions(DisplayImageOptions) from
* configuration} will be used.
* @param listener {@linkplain ImageLoadingListener Listener} for image loading process. Listener fires events on UI
* thread.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
* @throws IllegalArgumentException if passed imageView is null
*/
public void displayImage(String uri, ImageView imageView, DisplayImageOptions options,
ImageLoadingListener listener) {
displayImage(uri, new ImageViewAware(imageView), options, listener);
}
/**
* Adds load image task to execution pool. Image will be returned with
* {@link ImageLoadingListener#onLoadingComplete(String, android.view.View, android.graphics.Bitmap)} callback}.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param listener {@linkplain ImageLoadingListener Listener} for image loading process. Listener fires events on UI
* thread.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
*/
public void loadImage(String uri, ImageLoadingListener listener) {
loadImage(uri, null, null, listener);
}
/**
* Adds load image task to execution pool. Image will be returned with
* {@link ImageLoadingListener#onLoadingComplete(String, android.view.View, android.graphics.Bitmap)} callback}.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param targetImageSize Minimal size for {@link Bitmap} which will be returned in
* {@linkplain ImageLoadingListener#onLoadingComplete(String, android.view.View, android.graphics.Bitmap)} callback}. Downloaded image will be decoded
* and scaled to {@link Bitmap} of the size which is equal or larger (usually a bit larger) than
* incoming targetImageSize.
* @param listener {@linkplain ImageLoadingListener Listener} for image loading process. Listener fires events on UI
* thread.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
*/
public void loadImage(String uri, ImageSize targetImageSize, ImageLoadingListener listener) {
loadImage(uri, targetImageSize, null, listener);
}
/**
* Adds load image task to execution pool. Image will be returned with
* {@link ImageLoadingListener#onLoadingComplete(String, android.view.View, android.graphics.Bitmap)} callback}.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param options {@linkplain com.nostra13.universalimageloader.core.DisplayImageOptions Options} for image
* decoding and displaying. If null - default display image options
* {@linkplain ImageLoaderConfiguration.Builder#defaultDisplayImageOptions(DisplayImageOptions) from
* configuration} will be used.
* @param listener {@linkplain ImageLoadingListener Listener} for image loading process. Listener fires events on UI
* thread.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
*/
public void loadImage(String uri, DisplayImageOptions options, ImageLoadingListener listener) {
loadImage(uri, null, options, listener);
}
/**
* Adds load image task to execution pool. Image will be returned with
* {@link ImageLoadingListener#onLoadingComplete(String, android.view.View, android.graphics.Bitmap)} callback}.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param targetImageSize Minimal size for {@link Bitmap} which will be returned in
* {@linkplain ImageLoadingListener#onLoadingComplete(String, android.view.View, android.graphics.Bitmap)} callback}. Downloaded image will be decoded
* and scaled to {@link Bitmap} of the size which is equal or larger (usually a bit larger) than
* incoming targetImageSize.
* @param options {@linkplain com.nostra13.universalimageloader.core.DisplayImageOptions Options} for image
* decoding and displaying. If null - default display image options
* {@linkplain ImageLoaderConfiguration.Builder#defaultDisplayImageOptions(DisplayImageOptions) from
* configuration} will be used.
* @param listener {@linkplain ImageLoadingListener Listener} for image loading process. Listener fires events on UI
* THREAD.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
*/
public void loadImage(String uri, ImageSize targetImageSize, DisplayImageOptions options,
ImageLoadingListener listener) {
checkConfiguration();
if (targetImageSize == null) {
targetImageSize = configuration.getMaxImageSize();
}
if (options == null) {
options = configuration.defaultDisplayImageOptions;
}
ImageNonViewAware imageAware = new ImageNonViewAware(targetImageSize, ViewScaleType.CROP);
displayImage(uri, imageAware, options, listener);
}
/**
* Loads and decodes image synchronously.
* Default display image options
* {@linkplain ImageLoaderConfiguration.Builder#defaultDisplayImageOptions(DisplayImageOptions) from
* configuration} will be used.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @return Result image Bitmap. Can be null if image loading/decoding was failed or cancelled.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
*/
public Bitmap loadImageSync(String uri) {
return loadImageSync(uri, null, null);
}
/**
* Loads and decodes image synchronously.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param options {@linkplain com.nostra13.universalimageloader.core.DisplayImageOptions Options} for image
* decoding and scaling. If null - default display image options
* {@linkplain ImageLoaderConfiguration.Builder#defaultDisplayImageOptions(DisplayImageOptions) from
* configuration} will be used.
* @return Result image Bitmap. Can be null if image loading/decoding was failed or cancelled.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
*/
public Bitmap loadImageSync(String uri, DisplayImageOptions options) {
return loadImageSync(uri, null, options);
}
/**
* Loads and decodes image synchronously.
* Default display image options
* {@linkplain ImageLoaderConfiguration.Builder#defaultDisplayImageOptions(DisplayImageOptions) from
* configuration} will be used.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param targetImageSize Minimal size for {@link Bitmap} which will be returned. Downloaded image will be decoded
* and scaled to {@link Bitmap} of the size which is equal or larger (usually a bit
* larger) than incoming targetImageSize.
* @return Result image Bitmap. Can be null if image loading/decoding was failed or cancelled.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
*/
public Bitmap loadImageSync(String uri, ImageSize targetImageSize) {
return loadImageSync(uri, targetImageSize, null);
}
/**
* Loads and decodes image synchronously.
* NOTE: {@link #init(ImageLoaderConfiguration)} method must be called before this method call
*
* @param uri Image URI (i.e. "http://site.com/image.png", "file:///mnt/sdcard/image.png")
* @param targetImageSize Minimal size for {@link Bitmap} which will be returned. Downloaded image will be decoded
* and scaled to {@link Bitmap} of the size which is equal or larger (usually a bit
* larger) than incoming targetImageSize.
* @param options {@linkplain com.nostra13.universalimageloader.core.DisplayImageOptions Options} for image
* decoding and scaling. If null - default display image options
* {@linkplain ImageLoaderConfiguration.Builder#defaultDisplayImageOptions(DisplayImageOptions) from
* configuration} will be used.
* @return Result image Bitmap. Can be null if image loading/decoding was failed or cancelled.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
*/
public Bitmap loadImageSync(String uri, ImageSize targetImageSize, DisplayImageOptions options) {
if (options == null) {
options = configuration.defaultDisplayImageOptions;
}
options = new DisplayImageOptions.Builder().cloneFrom(options).syncLoading(true).build();
SyncImageLoadingListener listener = new SyncImageLoadingListener();
loadImage(uri, targetImageSize, options, listener);
return listener.getLoadedBitmap();
}
/**
* Checks if ImageLoader's configuration was initialized
*
* @throws IllegalStateException if configuration wasn't initialized
*/
private void checkConfiguration() {
if (configuration == null) {
throw new IllegalStateException(ERROR_NOT_INIT);
}
}
/**
* Returns memory cache
*
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
*/
public MemoryCacheAware getMemoryCache() {
checkConfiguration();
return configuration.memoryCache;
}
/**
* Clears memory cache
*
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
*/
public void clearMemoryCache() {
checkConfiguration();
configuration.memoryCache.clear();
}
/**
* Returns disc cache
*
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
*/
public DiscCacheAware getDiscCache() {
checkConfiguration();
return configuration.discCache;
}
/**
* Clears disc cache.
*
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called before
*/
public void clearDiscCache() {
checkConfiguration();
configuration.discCache.clear();
}
/**
* Returns URI of image which is loading at this moment into passed
* {@link com.nostra13.universalimageloader.core.imageaware.ImageAware ImageAware}
*/
public String getLoadingUriForView(ImageAware imageAware) {
return engine.getLoadingUriForView(imageAware);
}
/**
* Returns URI of image which is loading at this moment into passed
* {@link android.widget.ImageView ImageView}
*/
public String getLoadingUriForView(ImageView imageView) {
return engine.getLoadingUriForView(new ImageViewAware(imageView));
}
/**
* Cancel the task of loading and displaying image for passed
* {@link com.nostra13.universalimageloader.core.imageaware.ImageAware ImageAware}.
*
* @param imageAware {@link com.nostra13.universalimageloader.core.imageaware.ImageAware ImageAware} for
* which display task will be cancelled
*/
public void cancelDisplayTask(ImageAware imageAware) {
engine.cancelDisplayTaskFor(imageAware);
}
/**
* Cancel the task of loading and displaying image for passed
* {@link android.widget.ImageView ImageView}.
*
* @param imageView {@link android.widget.ImageView ImageView} for which display task will be cancelled
*/
public void cancelDisplayTask(ImageView imageView) {
engine.cancelDisplayTaskFor(new ImageViewAware(imageView));
}
/**
* Denies or allows ImageLoader to download images from the network.
*
* If downloads are denied and if image isn't cached then
* {@link ImageLoadingListener#onLoadingFailed(String, View, FailReason)} callback will be fired with
* {@link FailReason.FailType#NETWORK_DENIED}
*
* @param denyNetworkDownloads pass true - to deny engine to download images from the network; false -
* to allow engine to download images from network.
*/
public void denyNetworkDownloads(boolean denyNetworkDownloads) {
engine.denyNetworkDownloads(denyNetworkDownloads);
}
/**
* Sets option whether ImageLoader will use {@link FlushedInputStream} for network downloads to handle this known problem or not.
*
* @param handleSlowNetwork pass true - to use {@link FlushedInputStream} for network downloads; false
* - otherwise.
*/
public void handleSlowNetwork(boolean handleSlowNetwork) {
engine.handleSlowNetwork(handleSlowNetwork);
}
/**
* Pause ImageLoader. All new "load&display" tasks won't be executed until ImageLoader is {@link #resume() resumed}.
* Already running tasks are not paused.
*/
public void pause() {
engine.pause();
}
/** Resumes waiting "load&display" tasks */
public void resume() {
engine.resume();
}
/**
* Cancels all running and scheduled display image tasks.
* ImageLoader still can be used after calling this method.
*/
public void stop() {
engine.stop();
}
/**
* {@linkplain #stop() Stops ImageLoader} and clears current configuration.
* You can {@linkplain #init(ImageLoaderConfiguration) init} ImageLoader with new configuration after calling this
* method.
*/
public void destroy() {
if (configuration != null && configuration.writeLogs) L.d(LOG_DESTROY);
stop();
engine = null;
configuration = null;
}
}
