【Xutils-框架 BitmapUtils】解析！！！！！！！！！！！！！！！！！！！！！！！！

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/** *  * LJ 2015 0625 */package com.lidroid.xutils;import android.content.Context;import android.graphics.Bitmap;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.text.TextUtils;import android.view.View;import android.view.animation.Animation;import com.lidroid.xutils.bitmap.BitmapCacheListener;import com.lidroid.xutils.bitmap.BitmapCommonUtils;import com.lidroid.xutils.bitmap.BitmapDisplayConfig;import com.lidroid.xutils.bitmap.BitmapGlobalConfig;import com.lidroid.xutils.bitmap.callback.BitmapLoadCallBack;import com.lidroid.xutils.bitmap.callback.BitmapLoadFrom;import com.lidroid.xutils.bitmap.callback.DefaultBitmapLoadCallBack;import com.lidroid.xutils.bitmap.core.AsyncDrawable;import com.lidroid.xutils.bitmap.core.BitmapSize;import com.lidroid.xutils.bitmap.download.Downloader;import com.lidroid.xutils.cache.FileNameGenerator;import com.lidroid.xutils.task.PriorityAsyncTask;import com.lidroid.xutils.task.PriorityExecutor;import com.lidroid.xutils.task.TaskHandler;import java.io.File;import java.lang.ref.WeakReference;public class BitmapUtils implements TaskHandler {/** * 判断任务是否暂停 */private boolean pauseTask = false;/** * 是否取消所有任务 */private boolean cancelAllTask = false;private final Object pauseTaskLock = new Object();/** * Android上下文 */private Context context;private BitmapGlobalConfig globalConfig;private BitmapDisplayConfig defaultDisplayConfig;// ///////////////////////////////////////////// create// ///////////////////////////////////////////////////public BitmapUtils(Context context) {this(context, null);}/** *  * @param context *            上下文 * @param diskCachePath *            磁盘高速缓存路径 */public BitmapUtils(Context context, String diskCachePath) {if (context == null) {throw new IllegalArgumentException("context may not be null");}this.context = context.getApplicationContext();globalConfig = BitmapGlobalConfig.getInstance(this.context,diskCachePath);defaultDisplayConfig = new BitmapDisplayConfig();}/** *  * @param context *            上下文 * @param diskCachePath *            磁盘高速缓存路径 * @param memoryCacheSize *            内存缓存空间大小 */public BitmapUtils(Context context, String diskCachePath,int memoryCacheSize) {this(context, diskCachePath);globalConfig.setMemoryCacheSize(memoryCacheSize);}/** *  * @param context *            上下文 * @param diskCachePath *            磁盘高速缓存路径 * @param memoryCacheSize *            内存缓存空间大小 * @param diskCacheSize *            磁盘高速缓存空间大小 */public BitmapUtils(Context context, String diskCachePath,int memoryCacheSize, int diskCacheSize) {this(context, diskCachePath);globalConfig.setMemoryCacheSize(memoryCacheSize);globalConfig.setDiskCacheSize(diskCacheSize);}/** *  * @param context *            上下文 * @param diskCachePath *            磁盘高速缓存路径 * @param memoryCachePercent *            内存缓存百分比 */public BitmapUtils(Context context, String diskCachePath,float memoryCachePercent) {this(context, diskCachePath);globalConfig.setMemCacheSizePercent(memoryCachePercent);}/** *  * @param context *            上下文 * @param diskCachePath *            磁盘高速缓存路径 * @param memoryCachePercent *            内存缓存百分比 * @param diskCacheSize *            磁盘缓存空间大小 */public BitmapUtils(Context context, String diskCachePath,float memoryCachePercent, int diskCacheSize) {this(context, diskCachePath);globalConfig.setMemCacheSizePercent(memoryCachePercent);globalConfig.setDiskCacheSize(diskCacheSize);}// ////////////////////////////////////// config// /////////////////////////////////////////////////////////////////////** * 配置默认加载drawable类型资源图片 *  * @param drawable * @return */public BitmapUtils configDefaultLoadingImage(Drawable drawable) {defaultDisplayConfig.setLoadingDrawable(drawable);return this;}/** * 配置默认加载资源id类型资源图片 *  * @param resId * @return */public BitmapUtils configDefaultLoadingImage(int resId) {defaultDisplayConfig.setLoadingDrawable(context.getResources().getDrawable(resId));return this;}/** * 配置默认加载图片 *  * @param bitmap *            bitmap类中的资源图片 * @return */public BitmapUtils configDefaultLoadingImage(Bitmap bitmap) {defaultDisplayConfig.setLoadingDrawable(new BitmapDrawable(context.getResources(), bitmap));return this;}/** * 设置默认加载失败的图片 *  * @param drawable *            drawable类型的资源图片 * @return */public BitmapUtils configDefaultLoadFailedImage(Drawable drawable) {defaultDisplayConfig.setLoadFailedDrawable(drawable);return this;}/** * 配置默认加载失败图片，加载id类型资源图片 *  * @param resId * @return */public BitmapUtils configDefaultLoadFailedImage(int resId) {defaultDisplayConfig.setLoadFailedDrawable(context.getResources().getDrawable(resId));return this;}/** * 配置默认加载失败图片，加载Bitmap类型资源图片 *  * @param bitmap * @return */public BitmapUtils configDefaultLoadFailedImage(Bitmap bitmap) {defaultDisplayConfig.setLoadFailedDrawable(new BitmapDrawable(context.getResources(), bitmap));return this;}/** * 配置默认图片最大宽和高 *  * @param maxWidth *            最大宽 * @param maxHeight *            最大高 * @return */public BitmapUtils configDefaultBitmapMaxSize(int maxWidth, int maxHeight) {defaultDisplayConfig.setBitmapMaxSize(new BitmapSize(maxWidth,maxHeight));return this;}/** * 配置默认位图最大图片参数 *  * @param maxSize *            最大图片参数类 * @return */public BitmapUtils configDefaultBitmapMaxSize(BitmapSize maxSize) {defaultDisplayConfig.setBitmapMaxSize(maxSize);return this;}/** * 配置默认图片加载动画 *  * @param animation *            动画 * @return */public BitmapUtils configDefaultImageLoadAnimation(Animation animation) {defaultDisplayConfig.setAnimation(animation);return this;}/** * 配置默认自动旋转动画 *  * @param autoRotation * @return */public BitmapUtils configDefaultAutoRotation(boolean autoRotation) {defaultDisplayConfig.setAutoRotation(autoRotation);return this;}/** * 配置默认是否显示原始图片 *  * @param showOriginal *            true:显示原始图片，false：将会对图片压缩处理 * @return */public BitmapUtils configDefaultShowOriginal(boolean showOriginal) {defaultDisplayConfig.setShowOriginal(showOriginal);return this;}/** * 配置默认图片配置，传入Bitmap.Config类型 *  * @param config * @return */public BitmapUtils configDefaultBitmapConfig(Bitmap.Config config) {defaultDisplayConfig.setBitmapConfig(config);return this;}/** * 配置默认显示配置 *  * @param displayConfig * @return */public BitmapUtils configDefaultDisplayConfig(BitmapDisplayConfig displayConfig) {defaultDisplayConfig = displayConfig;return this;}/** * 配置下载参数 *  * @param downloader * @return */public BitmapUtils configDownloader(Downloader downloader) {globalConfig.setDownloader(downloader);return this;}/** * 配置默认缓存失效 *  * @param defaultExpiry * @return */public BitmapUtils configDefaultCacheExpiry(long defaultExpiry) {globalConfig.setDefaultCacheExpiry(defaultExpiry);return this;}/** * 配置默认链接时间超时时间 *  * @param connectTimeout *            毫秒单位 * @return */public BitmapUtils configDefaultConnectTimeout(int connectTimeout) {globalConfig.setDefaultConnectTimeout(connectTimeout);return this;}/** * 配置默认读取超时时间 *  * @param readTimeout *            毫秒 * @return */public BitmapUtils configDefaultReadTimeout(int readTimeout) {globalConfig.setDefaultReadTimeout(readTimeout);return this;}/** * 配置线程池多少 *  * @param threadPoolSize *            线程池数 此参数没有设置，默认是设置5个核心线程池 * @return */public BitmapUtils configThreadPoolSize(int threadPoolSize) {globalConfig.setThreadPoolSize(threadPoolSize);return this;}/** * 配置内存缓存是否启用，默认是启用的 *  * @param enabled * @return */public BitmapUtils configMemoryCacheEnabled(boolean enabled) {globalConfig.setMemoryCacheEnabled(enabled);return this;}/** * 配置磁盘缓存功能，默认是启用的 *  * @param enabled * @return */public BitmapUtils configDiskCacheEnabled(boolean enabled) {globalConfig.setDiskCacheEnabled(enabled);return this;}/** * 配置原始磁盘缓存文件名称 *  * @param fileNameGenerator * @return */public BitmapUtils configDiskCacheFileNameGenerator(FileNameGenerator fileNameGenerator) {globalConfig.setFileNameGenerator(fileNameGenerator);return this;}/** * 配置位图缓存监听 *  * @param listener * @return */public BitmapUtils configBitmapCacheListener(BitmapCacheListener listener) {globalConfig.setBitmapCacheListener(listener);return this;}// //////////////////////// display /////////////////////////////////////** * 根据图片路径，显示到具体的View上 *  * @param container *            要把图片显示到的View * @param uri *            图片路径 */public <T extends View> void display(T container, String uri) {display(container, uri, null, null);}/** * 根据图片路径，显示到具体的View上 *  * @param container *            要把图片显示到的View * @param uri *            图片路径 * @param displayConfig */public <T extends View> void display(T container, String uri,BitmapDisplayConfig displayConfig) {display(container, uri, displayConfig, null);}/** * 根据图片路径，显示到具体的View上 *  * @param container *            要把图片显示到的View * @param uri *            图片路径 * @param callBack *            加载过程回调各种状态 */public <T extends View> void display(T container, String uri,BitmapLoadCallBack<T> callBack) {display(container, uri, null, callBack);}/** * 根据图片路径，显示到具体的View上 *  * @param container *            要把图片显示到的View * @param uri *            图片路径 * @param displayConfig *            位图显示配置 * @param callBack */public <T extends View> void display(T container, String uri,BitmapDisplayConfig displayConfig, BitmapLoadCallBack<T> callBack) {if (container == null) {return;}if (callBack == null) {callBack = new DefaultBitmapLoadCallBack<T>();}if (displayConfig == null || displayConfig == defaultDisplayConfig) {displayConfig = defaultDisplayConfig.cloneNew();}// Optimize Max SizeBitmapSize size = displayConfig.getBitmapMaxSize();displayConfig.setBitmapMaxSize(BitmapCommonUtils.optimizeMaxSizeByView(container, size.getWidth(), size.getHeight()));container.clearAnimation();if (TextUtils.isEmpty(uri)) {callBack.onLoadFailed(container, uri,displayConfig.getLoadFailedDrawable());return;}// start loadingcallBack.onPreLoad(container, uri, displayConfig);// find bitmap from mem cache.Bitmap bitmap = globalConfig.getBitmapCache().getBitmapFromMemCache(uri, displayConfig);if (bitmap != null) {callBack.onLoadStarted(container, uri, displayConfig);callBack.onLoadCompleted(container, uri, bitmap, displayConfig,BitmapLoadFrom.MEMORY_CACHE);} else if (!bitmapLoadTaskExist(container, uri, callBack)) {final BitmapLoadTask<T> loadTask = new BitmapLoadTask<T>(container,uri, displayConfig, callBack);// get executorPriorityExecutor executor = globalConfig.getBitmapLoadExecutor();File diskCacheFile = this.getBitmapFileFromDiskCache(uri);boolean diskCacheExist = diskCacheFile != null&& diskCacheFile.exists();if (diskCacheExist && executor.isBusy()) {executor = globalConfig.getDiskCacheExecutor();}// set loading imageDrawable loadingDrawable = displayConfig.getLoadingDrawable();callBack.setDrawable(container, new AsyncDrawable<T>(loadingDrawable, loadTask));loadTask.setPriority(displayConfig.getPriority());loadTask.executeOnExecutor(executor);}}// ///////////////////////////////////////////// cache// //////////////////////////////////////////////////////////////////** * 清除内存和磁盘缓存 */public void clearCache() {globalConfig.clearCache();}/** * 清除内存缓存 */public void clearMemoryCache() {globalConfig.clearMemoryCache();}/** * 清除磁盘缓存 */public void clearDiskCache() {globalConfig.clearDiskCache();}/** * 根据uri清除内存缓存和磁盘缓存 *  * @param uri */public void clearCache(String uri) {globalConfig.clearCache(uri);}/** * 根据uri清除内存缓存 *  * @param uri */public void clearMemoryCache(String uri) {globalConfig.clearMemoryCache(uri);}/** * 根据uri清除磁盘缓存 *  * @param uri */public void clearDiskCache(String uri) {globalConfig.clearDiskCache(uri);}/** * 刷新缓存 */public void flushCache() {globalConfig.flushCache();}/** * 关闭缓存 */public void closeCache() {globalConfig.closeCache();}/** * 根据uri从磁盘缓存得到位图文件 *  * @param uri * @return */public File getBitmapFileFromDiskCache(String uri) {return globalConfig.getBitmapCache().getBitmapFileFromDiskCache(uri);}/** * 根据uri和位图显示配置从磁盘缓存得到位图文件 *  * @param uri * @param config * @return */public Bitmap getBitmapFromMemCache(String uri, BitmapDisplayConfig config) {if (config == null) {config = defaultDisplayConfig;}return globalConfig.getBitmapCache().getBitmapFromMemCache(uri, config);}// //////////////////////////////////////// tasks// ///////////////////////////////////////////////////////////////////////** * 支持暂停 */@Overridepublic boolean supportPause() {return true;}/** * 支持重新开始 */@Overridepublic boolean supportResume() {return true;}/** * 支持取消 */@Overridepublic boolean supportCancel() {return true;}/** * 暂停 */@Overridepublic void pause() {pauseTask = true;flushCache();}/** * 刷新 */@Overridepublic void resume() {pauseTask = false;synchronized (pauseTaskLock) {pauseTaskLock.notifyAll();}}/** * 取消 */@Overridepublic void cancel() {pauseTask = true;cancelAllTask = true;synchronized (pauseTaskLock) {pauseTaskLock.notifyAll();}}/** * 是否暂停 */@Overridepublic boolean isPaused() {return pauseTask;}/** * 是否是取消了 */@Overridepublic boolean isCancelled() {return cancelAllTask;}// //////////////////////////////////////////////下面这些方法是否没有提供给开发者使用的///////////////////////////////////////////////////////////////@SuppressWarnings("unchecked")private static <T extends View> BitmapLoadTask<T> getBitmapTaskFromContainer(T container, BitmapLoadCallBack<T> callBack) {if (container != null) {final Drawable drawable = callBack.getDrawable(container);if (drawable instanceof AsyncDrawable) {final AsyncDrawable<T> asyncDrawable = (AsyncDrawable<T>) drawable;return asyncDrawable.getBitmapWorkerTask();}}return null;}private static <T extends View> boolean bitmapLoadTaskExist(T container,String uri, BitmapLoadCallBack<T> callBack) {final BitmapLoadTask<T> oldLoadTask = getBitmapTaskFromContainer(container, callBack);if (oldLoadTask != null) {final String oldUrl = oldLoadTask.uri;if (TextUtils.isEmpty(oldUrl) || !oldUrl.equals(uri)) {oldLoadTask.cancel(true);} else {return true;}}return false;}public class BitmapLoadTask<T extends View> extendsPriorityAsyncTask<Object, Object, Bitmap> {private final String uri;private final WeakReference<T> containerReference;private final BitmapLoadCallBack<T> callBack;private final BitmapDisplayConfig displayConfig;private BitmapLoadFrom from = BitmapLoadFrom.DISK_CACHE;public BitmapLoadTask(T container, String uri,BitmapDisplayConfig config, BitmapLoadCallBack<T> callBack) {if (container == null || uri == null || config == null|| callBack == null) {throw new IllegalArgumentException("args may not be null");}this.containerReference = new WeakReference<T>(container);this.callBack = callBack;this.uri = uri;this.displayConfig = config;}@Overrideprotected Bitmap doInBackground(Object... params) {synchronized (pauseTaskLock) {while (pauseTask && !this.isCancelled()) {try {pauseTaskLock.wait();if (cancelAllTask) {return null;}} catch (Throwable e) {}}}Bitmap bitmap = null;// get cache from disk cacheif (!this.isCancelled() && this.getTargetContainer() != null) {this.publishProgress(PROGRESS_LOAD_STARTED);bitmap = globalConfig.getBitmapCache().getBitmapFromDiskCache(uri, displayConfig);}// download imageif (bitmap == null && !this.isCancelled()&& this.getTargetContainer() != null) {bitmap = globalConfig.getBitmapCache().downloadBitmap(uri,displayConfig, this);from = BitmapLoadFrom.URI;}return bitmap;}public void updateProgress(long total, long current) {this.publishProgress(PROGRESS_LOADING, total, current);}private static final int PROGRESS_LOAD_STARTED = 0;private static final int PROGRESS_LOADING = 1;@Overrideprotected void onProgressUpdate(Object... values) {if (values == null || values.length == 0)return;final T container = this.getTargetContainer();if (container == null)return;switch ((Integer) values[0]) {case PROGRESS_LOAD_STARTED:callBack.onLoadStarted(container, uri, displayConfig);break;case PROGRESS_LOADING:if (values.length != 3)return;callBack.onLoading(container, uri, displayConfig,(Long) values[1], (Long) values[2]);break;default:break;}}@Overrideprotected void onPostExecute(Bitmap bitmap) {final T container = this.getTargetContainer();if (container != null) {if (bitmap != null) {callBack.onLoadCompleted(container, this.uri, bitmap,displayConfig, from);} else {callBack.onLoadFailed(container, this.uri,displayConfig.getLoadFailedDrawable());}}}@Overrideprotected void onCancelled(Bitmap bitmap) {synchronized (pauseTaskLock) {pauseTaskLock.notifyAll();}}public T getTargetContainer() {final T container = containerReference.get();final BitmapLoadTask<T> bitmapWorkerTask = getBitmapTaskFromContainer(container, callBack);if (this == bitmapWorkerTask) {return container;}return null;}}}......
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