/**
* 删除缓存的图片
*
* @param url 缓存的图片的地址
*/
public static void removeMemoryCache(String url) {
if (TextUtils.isEmpty(url)) {
return;
}
DiskCacheUtils.removeFromCache(url, ImageLoader.getInstance().getDiskCache());
MemoryCacheUtils.removeFromCache(url, ImageLoader.getInstance().getMemoryCache());
}
/** 从ImageLoader内存缓存中取出头像位图 */
private static Bitmap getMemoryCachedAvatarBitmap(UserInfoProvider.UserInfo userInfo) {
if (userInfo == null || !isImageUriValid(userInfo.getAvatar())) {
return null;
}
String key = HeadImageView.getAvatarCacheKey(userInfo.getAvatar());
// DiskCacheUtils.findInCache(uri, ImageLoader.getInstance().getDiskCache() 查询磁盘缓存示例
List<Bitmap> bitmaps =
MemoryCacheUtils.findCachedBitmapsForImageUri(
key, ImageLoader.getInstance().getMemoryCache());
if (bitmaps.size() > 0) {
return bitmaps.get(0);
}
return null;
}
private void initEmptyFieldsWithDefaultValues()
{
if (taskExecutor == null)
{
taskExecutor = DefaultConfigurationFactory.createExecutor(threadPoolSize, threadPriority, tasksProcessingType);
} else
{
customExecutor = true;
}
if (taskExecutorForCachedImages == null)
{
taskExecutorForCachedImages = DefaultConfigurationFactory.createExecutor(threadPoolSize, threadPriority, tasksProcessingType);
} else
{
customExecutorForCachedImages = true;
}
if (diskCache == null)
{
if (diskCacheFileNameGenerator == null)
{
diskCacheFileNameGenerator = DefaultConfigurationFactory.createFileNameGenerator();
}
diskCache = DefaultConfigurationFactory.createDiskCache(context, diskCacheFileNameGenerator, diskCacheSize, diskCacheFileCount);
}
if (memoryCache == null)
{
memoryCache = DefaultConfigurationFactory.createMemoryCache(memoryCacheSize);
}
if (denyCacheImageMultipleSizesInMemory)
{
memoryCache = new FuzzyKeyMemoryCache(memoryCache, MemoryCacheUtils.createFuzzyKeyComparator());
}
if (downloader == null)
{
downloader = DefaultConfigurationFactory.createImageDownloader(context);
}
if (decoder == null)
{
decoder = DefaultConfigurationFactory.createImageDecoder(writeLogs);
}
if (defaultDisplayImageOptions == null)
{
defaultDisplayImageOptions = DisplayImageOptions.createSimple();
}
}
/**
* Adds display image task to execution pool. Image will be set to ImageAware when it's turn.<br>
* <b>NOTE:</b> {@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 <b>null</b> - 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 if this method is called on UI thread.
* @param progressListener {@linkplain
* com.nostra13.universalimageloader.core.listener.ImageLoadingProgressListener Listener} for
* image loading progress. Listener fires events on UI thread if this method is called on UI
* thread. Caching on disk should be enabled in {@linkplain
* com.nostra13.universalimageloader.core.DisplayImageOptions options} to make this listener
* work.
* @throws IllegalStateException if {@link #init(ImageLoaderConfiguration)} method wasn't called
* before
* @throws IllegalArgumentException if passed <b>imageAware</b> is null
*/
public void displayImage(
String uri,
ImageAware imageAware,
DisplayImageOptions options,
ImageLoadingListener listener,
ImageLoadingProgressListener progressListener) {
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 = MemoryCacheUtils.generateKey(uri, targetSize);
engine.prepareDisplayTaskFor(imageAware, memoryCacheKey);
listener.onLoadingStarted(uri, imageAware.getWrappedView());
Bitmap bmp = configuration.memoryCache.get(memoryCacheKey);
if (bmp != null && !bmp.isRecycled()) {
L.d(LOG_LOAD_IMAGE_FROM_MEMORY_CACHE, memoryCacheKey);
if (options.shouldPostProcess()) {
ImageLoadingInfo imageLoadingInfo =
new ImageLoadingInfo(
uri,
imageAware,
targetSize,
memoryCacheKey,
options,
listener,
progressListener,
engine.getLockForUri(uri));
ProcessAndDisplayImageTask displayTask =
new ProcessAndDisplayImageTask(engine, bmp, imageLoadingInfo, defineHandler(options));
if (options.isSyncLoading()) {
displayTask.run();
} else {
engine.submit(displayTask);
}
} else {
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,
progressListener,
engine.getLockForUri(uri));
LoadAndDisplayImageTask displayTask =
new LoadAndDisplayImageTask(engine, imageLoadingInfo, defineHandler(options));
if (options.isSyncLoading()) {
displayTask.run();
} else {
engine.submit(displayTask);
}
}
}
