标签:android http io os ar java for sp 2014
【】带线程安全的单例模式.
【】涉及线程安全的函数写法
异步线程下载库源码分析:
【】displayImage
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); } } }
【】loadImage
public void loadImage(String uri, ImageSize targetImageSize, DisplayImageOptions options, ImageLoadingListener listener, ImageLoadingProgressListener progressListener) { checkConfiguration(); if (targetImageSize == null) { targetImageSize = configuration.getMaxImageSize(); } if (options == null) { options = configuration.defaultDisplayImageOptions; } NonViewAware imageAware = new NonViewAware(uri, targetImageSize, ViewScaleType.CROP); displayImage(uri, imageAware, options, listener, progressListener); }
【】loadImageSync
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(); }
【】线程池 ExecutorService
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Android Universalimageloader 源码分析
标签:android http io os ar java for sp 2014
原文地址:http://my.oschina.net/hailongqiu/blog/323752