package com.koushikdutta.urlimageviewhelper; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.ArrayList; import java.util.Hashtable; import junit.framework.Assert; import org.apache.http.NameValuePair; import android.annotation.TargetApi; import android.content.Context; import android.content.res.AssetManager; import android.content.res.Resources; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.BitmapFactory.Options; import android.graphics.Matrix; import android.graphics.RectF; import android.graphics.drawable.BitmapDrawable; import android.graphics.drawable.Drawable; import android.os.AsyncTask; import android.os.Build; import android.os.Looper; import android.util.DisplayMetrics; import android.util.Log; import android.view.WindowManager; import android.widget.ImageView; public final class UrlImageViewHelper { static void clog(String format, Object... args) { String log; if (args.length == 0) log = format; else log = String.format(format, args); if (Constants.LOG_ENABLED) Log.i(Constants.LOGTAG, log); } public static int copyStream(final InputStream input, final OutputStream output) throws IOException { final byte[] stuff = new byte[1024]; int read = 0; int total = 0; while ((read = input.read(stuff)) != -1) { output.write(stuff, 0, read); total += read; } return total; } static Resources mResources; static DisplayMetrics mMetrics; private static void prepareResources(final Context context) { if (mMetrics != null) { return; } mMetrics = new DisplayMetrics(); //final Activity act = (Activity)context; //act.getWindowManager().getDefaultDisplay().getMetrics(mMetrics); ((WindowManager) context.getSystemService(Context.WINDOW_SERVICE)) .getDefaultDisplay().getMetrics(mMetrics); final AssetManager mgr = context.getAssets(); mResources = new Resources(mgr, mMetrics, context.getResources().getConfiguration()); } /** * If bitmap can't be loaded successfully, errorResource will be draw to imageview * @param drawable resource */ private static int mErrorResource = 0; public static void setErrorResource(int errorResource) { mErrorResource = errorResource; } private static boolean mUseZoomIn = true; private static boolean mUseZoomOut = true; /** * Bitmap scaling will use smart/sane values to limit the maximum * dimension of the bitmap during decode. This will prevent any dimension of the * bitmap from being smaller than the dimensions of the device itself. * @param useBitmapScaling Toggle for smart resizing. */ public static void setUseZoomIn(boolean useZoomIn) { mUseZoomIn = useZoomIn; } /** * Bitmap scaling will use smart/sane values to limit the maximum * dimension of the bitmap during decode. This will prevent any dimension of the * bitmap from being smaller than the dimensions of the device itself. */ public static boolean getUseZoomIn() { return mUseZoomIn; } /** * Bitmap scaling will use smart/sane values to limit the maximum * dimension of the bitmap during decode. This will prevent any dimension of the * bitmap from being larger than the dimensions of the device itself. * Doing this will conserve memory. * @param useBitmapScaling Toggle for smart resizing. */ public static void setUseZoomOut(boolean useZoomOut) { mUseZoomOut = useZoomOut; } /** * Bitmap scaling will use smart/sane values to limit the maximum * dimension of the bitmap during decode. This will prevent any dimension of the * bitmap from being larger than the dimensions of the device itself. * Doing this will conserve memory. */ public static boolean getUseZoomOut() { return mUseZoomOut; } private static Drawable loadDrawableFromStream(final Context context, final String url, final String filename, final int targetWidth, final int targetHeight) { prepareResources(context); // clog(String.format("Target size: (%dx%d).", targetWidth, targetHeight)); FileInputStream stream = null; // clog("Decoding: url=" + url + " filename=" + filename); try { BitmapFactory.Options o = null; Bitmap bitmap = null; if (mUseZoomOut || mUseZoomIn) { // decode image size (decode metadata only, not the whole image) o = new BitmapFactory.Options(); o.inJustDecodeBounds = true; stream = new FileInputStream(filename); BitmapFactory.decodeStream(stream, null, o); stream.close(); // get original image size int inWidth = o.outWidth; int inHeight = o.outHeight; clog(String.format("Original bitmap size: (%dx%d).", inWidth, inHeight)); // get size for pre-resized image o = new Options(); o.inSampleSize = Math.max(inWidth/targetWidth, inHeight/targetHeight); } // decode pre-resized image stream = new FileInputStream(filename); // o.inPurgeable = true; bitmap = BitmapFactory.decodeStream(stream, null, o); stream.close(); clog(String.format("Pre-sized bitmap size: (%dx%d).", bitmap.getWidth(), bitmap.getHeight())); if (mUseZoomOut || mUseZoomIn) { // create bitmap which matches exactly with the target size float[] values = new float[9]; // calc exact destination size // http://developer.android.com/reference/android/graphics/Matrix.ScaleToFit.html Matrix m = new Matrix(); RectF inRect = new RectF(0, 0, bitmap.getWidth(), bitmap.getHeight()); RectF outRect = new RectF(0, 0, targetWidth, targetHeight); m.setRectToRect(inRect, outRect, Matrix.ScaleToFit.CENTER); m.getValues(values); clog(String.format("Zoom: (%fx%f).", values[0], values[4])); if( mUseZoomOut && (values[0] < 1.0 || values[4] < 1.0) ){ bitmap = Bitmap.createScaledBitmap(bitmap, (int) (bitmap.getWidth() * values[0]), (int) (bitmap.getHeight() * values[4]), true); clog("Zoom out"); } if( mUseZoomIn && (values[0] > 1.0 || values[4] > 1.0) ){ bitmap = Bitmap.createScaledBitmap(bitmap, (int) (bitmap.getWidth() * values[0]), (int) (bitmap.getHeight() * values[4]), true); clog("Zoom in"); } } clog(String.format("Final bitmap size: (%dx%d).", bitmap.getWidth(), bitmap.getHeight())); final BitmapDrawable bd = new BitmapDrawable(mResources, bitmap); return bd; } catch (final IOException e) { clog(e.toString()); return null; } catch (final OutOfMemoryError e) { clog(e.toString()); return null; } finally { if (stream != null) { try { stream.close(); } catch (IOException e) { Log.w(Constants.LOGTAG, "Failed to close FileInputStream", e); } } } } public static final int CACHE_DURATION_INFINITE = Integer.MAX_VALUE; public static final int CACHE_DURATION_ONE_DAY = 1000 * 60 * 60 * 24; public static final int CACHE_DURATION_TWO_DAYS = CACHE_DURATION_ONE_DAY * 2; public static final int CACHE_DURATION_THREE_DAYS = CACHE_DURATION_ONE_DAY * 3; public static final int CACHE_DURATION_FOUR_DAYS = CACHE_DURATION_ONE_DAY * 4; public static final int CACHE_DURATION_FIVE_DAYS = CACHE_DURATION_ONE_DAY * 5; public static final int CACHE_DURATION_SIX_DAYS = CACHE_DURATION_ONE_DAY * 6; public static final int CACHE_DURATION_ONE_WEEK = CACHE_DURATION_ONE_DAY * 7; /** * Download and shrink an Image located at a specified URL, and display it * in the provided {@link ImageView}. * * @param imageView The {@link ImageView} to display the image to after it * is loaded. * @param url The URL of the image that should be loaded. * @param defaultResource The Android resid of the {@link Drawable} that * should be displayed while the image is being downloaded. */ public static void setUrlDrawable(final ImageView imageView, final String url, final int defaultResource) { setUrlDrawable(imageView.getContext(), imageView, url, defaultResource, CACHE_DURATION_THREE_DAYS); } /** * Download and shrink an Image located at a specified URL, and display it * in the provided {@link ImageView} once it finishes loading. * * @param imageView The {@link ImageView} to display the image to after it * is loaded. * @param url The URL of the image that should be loaded. */ public static void setUrlDrawable(final ImageView imageView, final String url) { setUrlDrawable(imageView.getContext(), imageView, url, null, CACHE_DURATION_THREE_DAYS, null); } public static void loadUrlDrawable(final Context context, final String url) { setUrlDrawable(context, null, url, null, CACHE_DURATION_THREE_DAYS, null); } /** * Download and shrink an Image located at a specified URL, and display it * in the provided {@link ImageView}. * * @param imageView The {@link ImageView} to display the image to after it * is loaded. * @param url The URL of the image that should be loaded. * @param defaultDrawable A {@link Drawable} that should be displayed in * {@code imageView} while the image has not been loaded. This * image will also be displayed if the image fails to load. This * can be set to {@code null}. */ public static void setUrlDrawable(final ImageView imageView, final String url, final Drawable defaultDrawable) { setUrlDrawable(imageView.getContext(), imageView, url, defaultDrawable, CACHE_DURATION_THREE_DAYS, null); } /** * Download and shrink an Image located at a specified URL, and display it * in the provided {@link ImageView}. * * @param imageView The {@link ImageView} to display the image to after it * is loaded. * @param url The URL of the image that should be loaded. * @param defaultResource The Android resid of the {@link Drawable} that * should be displayed while the image is being downloaded. * @param cacheDurationMs The length of time, in milliseconds, that this * image should be cached locally. */ public static void setUrlDrawable(final ImageView imageView, final String url, final int defaultResource, final long cacheDurationMs) { setUrlDrawable(imageView.getContext(), imageView, url, defaultResource, cacheDurationMs); } public static void loadUrlDrawable(final Context context, final String url, final long cacheDurationMs) { setUrlDrawable(context, null, url, null, cacheDurationMs, null); } /** * Download and shrink an Image located at a specified URL, and display it * in the provided {@link ImageView}. * * @param imageView The {@link ImageView} to display the image to after it * is loaded. * @param url The URL of the image that should be loaded. * @param defaultDrawable A {@link Drawable} that should be displayed in * {@code imageView} while the image has not been loaded. This * image will also be displayed if the image fails to load. This * can be set to {@code null}. * @param cacheDurationMs The length of time, in milliseconds, that this * image should be cached locally. */ public static void setUrlDrawable(final ImageView imageView, final String url, final Drawable defaultDrawable, final long cacheDurationMs) { setUrlDrawable(imageView.getContext(), imageView, url, defaultDrawable, cacheDurationMs, null); } /** * Download and shrink an Image located at a specified URL, and display it * in the provided {@link ImageView}. * * @param context A {@link Context} to allow setUrlDrawable to load and save * files. * @param imageView The {@link ImageView} to display the image to after it * is loaded. * @param url The URL of the image that should be loaded. * @param defaultResource The Android resid of the {@link Drawable} that * should be displayed while the image is being downloaded. * @param cacheDurationMs The length of time, in milliseconds, that this * image should be cached locally. */ private static void setUrlDrawable(final Context context, final ImageView imageView, final String url, final int defaultResource, final long cacheDurationMs) { Drawable d = null; if (defaultResource != 0) { d = imageView.getResources().getDrawable(defaultResource); } setUrlDrawable(context, imageView, url, d, cacheDurationMs, null); } /** * Download and shrink an Image located at a specified URL, and display it * in the provided {@link ImageView}. * * @param imageView The {@link ImageView} to display the image to after it * is loaded. * @param url The URL of the image that should be loaded. * @param defaultResource The Android resid of the {@link Drawable} that * should be displayed while the image is being downloaded. * @param callback An instance of {@link UrlImageViewCallback} that is * called when the image successfully finishes loading. This * value can be null. */ public static void setUrlDrawable(final ImageView imageView, final String url, final int defaultResource, final UrlImageViewCallback callback) { setUrlDrawable(imageView.getContext(), imageView, url, defaultResource, CACHE_DURATION_THREE_DAYS, callback); } /** * Download and shrink an Image located at a specified URL, and display it * in the provided {@link ImageView}. * * @param imageView The {@link ImageView} to display the image to after it * is loaded. * @param url The URL of the image that should be loaded. * @param callback An instance of {@link UrlImageViewCallback} that is * called when the image successfully finishes loading. This * value can be null. */ public static void setUrlDrawable(final ImageView imageView, final String url, final UrlImageViewCallback callback) { setUrlDrawable(imageView.getContext(), imageView, url, null, CACHE_DURATION_THREE_DAYS, callback); } public static void loadUrlDrawable(final Context context, final String url, final UrlImageViewCallback callback) { setUrlDrawable(context, null, url, null, CACHE_DURATION_THREE_DAYS, callback); } /** * Download and shrink an Image located at a specified URL, and display it * in the provided {@link ImageView}. * * @param imageView The {@link ImageView} to display the image to after it * is loaded. * @param url The URL of the image that should be loaded. * @param defaultDrawable A {@link Drawable} that should be displayed in * {@code imageView} while the image has not been loaded. This * image will also be displayed if the image fails to load. This * can be set to {@code null}. * @param callback An instance of {@link UrlImageViewCallback} that is * called when the image successfully finishes loading. This * value can be null. */ public static void setUrlDrawable(final ImageView imageView, final String url, final Drawable defaultDrawable, final UrlImageViewCallback callback) { setUrlDrawable(imageView.getContext(), imageView, url, defaultDrawable, CACHE_DURATION_THREE_DAYS, callback); } /** * Download and shrink an Image located at a specified URL, and display it * in the provided {@link ImageView}. * * @param imageView The {@link ImageView} to display the image to after it * is loaded. * @param url The URL of the image that should be loaded. * @param defaultResource The Android resid of the {@link Drawable} that * should be displayed while the image is being downloaded. * @param cacheDurationMs The length of time, in milliseconds, that this * image should be cached locally. * @param callback An instance of {@link UrlImageViewCallback} that is * called when the image successfully finishes loading. This * value can be null. */ public static void setUrlDrawable(final ImageView imageView, final String url, final int defaultResource, final long cacheDurationMs, final UrlImageViewCallback callback) { setUrlDrawable(imageView.getContext(), imageView, url, defaultResource, cacheDurationMs, callback); } public static void loadUrlDrawable(final Context context, final String url, final long cacheDurationMs, final UrlImageViewCallback callback) { setUrlDrawable(context, null, url, null, cacheDurationMs, callback); } /** * Download and shrink an Image located at a specified URL, and display it * in the provided {@link ImageView}. * * @param imageView The {@link ImageView} to display the image to after it * is loaded. * @param url The URL of the image that should be loaded. * @param defaultDrawable A {@link Drawable} that should be displayed in * {@code imageView} while the image has not been loaded. This * image will also be displayed if the image fails to load. This * can be set to {@code null}. * @param cacheDurationMs The length of time, in milliseconds, that this * image should be cached locally. * @param callback An instance of {@link UrlImageViewCallback} that is * called when the image successfully finishes loading. This * value can be null. */ public static void setUrlDrawable(final ImageView imageView, final String url, final Drawable defaultDrawable, final long cacheDurationMs, final UrlImageViewCallback callback) { setUrlDrawable(imageView.getContext(), imageView, url, defaultDrawable, cacheDurationMs, callback); } /** * Download and shrink an Image located at a specified URL, and display it * in the provided {@link ImageView}. * * @param context A {@link Context} to allow setUrlDrawable to load and save * files. * @param imageView The {@link ImageView} to display the image to after it * is loaded. * @param url The URL of the image that should be loaded. * @param defaultResource The Android resid of the {@link Drawable} that * should be displayed while the image is being downloaded. * @param cacheDurationMs The length of time, in milliseconds, that this * image should be cached locally. * @param callback An instance of {@link UrlImageViewCallback} that is * called when the image successfully finishes loading. This * value can be null. */ private static void setUrlDrawable(final Context context, final ImageView imageView, final String url, final int defaultResource, final long cacheDurationMs, final UrlImageViewCallback callback) { Drawable d = null; if (defaultResource != 0) { d = imageView.getResources().getDrawable(defaultResource); } setUrlDrawable(context, imageView, url, d, cacheDurationMs, callback); } private static boolean isNullOrEmpty(final CharSequence s) { return (s == null || s.equals("") || s.equals("null") || s.equals("NULL")); } public static String getFilenameForUrl(final String url) { return url.hashCode() + ".urlimage"; } /** * Clear out cached images. * @param context * @param age The max age of a file. Files older than this age * will be removed. */ public static void cleanup(final Context context, long age) { clog(String.format("Cleanup, age=%d", age)); try { // purge any *.urlimage files over "age" old final String[] files = context.getExternalFilesDir(null).list(); if (files == null) { clog("Cleanup, no cached files found"); return; } for (final String file : files) { if (!file.endsWith(".urlimage")) { continue; } final File f = new File(context.getExternalFilesDir(null), file); if (System.currentTimeMillis() > f.lastModified() + age) { f.delete(); clog(String.format("Cached file %s removed", file)); } } } catch (final Exception e) { e.printStackTrace(); } } /** * Clear out all cached images older than a week * it will call cleanup(context, CACHE_DURATION_ONE_WEEK); * @param context */ private static boolean mHasCleaned = false; public static void cleanup(final Context context) { // only cleanup for the first time if(mHasCleaned) return; mHasCleaned = true; // purge any *.urlimage files over a week old cleanup(context, CACHE_DURATION_ONE_WEEK); } private static boolean checkCacheDuration(File file, long cacheDurationMs) { return cacheDurationMs == CACHE_DURATION_INFINITE || System.currentTimeMillis() < file.lastModified() + cacheDurationMs; } /** * Download and shrink an Image located at a specified URL, and display it * in the provided {@link ImageView}. * * @param context A {@link Context} to allow setUrlDrawable to load and save * files. * @param imageView The {@link ImageView} to display the image to after it * is loaded. * @param url The URL of the image that should be loaded. * @param defaultDrawable A {@link Drawable} that should be displayed in * {@code imageView} while the image has not been loaded. This * image will also be displayed if the image fails to load. This * can be set to {@code null}. * @param cacheDurationMs The length of time, in milliseconds, that this * image should be cached locally. * @param callback An instance of {@link UrlImageViewCallback} that is * called when the image successfully finishes loading. This * value can be null. */ private static void setUrlDrawable(final Context context, final ImageView imageView, final String url, final Drawable defaultDrawable, final long cacheDurationMs, final UrlImageViewCallback callback) { Assert.assertTrue("setUrlDrawable and loadUrlDrawable should only be called from the main thread.", Looper.getMainLooper().getThread() == Thread.currentThread()); cleanup(context); // disassociate this ImageView from any pending downloads if (isNullOrEmpty(url)) { if (imageView != null) { mPendingViews.remove(imageView); imageView.setImageDrawable(defaultDrawable); } return; } final int tw; final int th; if (mMetrics == null) prepareResources(context); tw = mMetrics.widthPixels; th = mMetrics.heightPixels; final File file = new File(context.getExternalFilesDir(null), getFilenameForUrl(url)); final String filename = file.getAbsolutePath(); clog(String.format("Target file cache = %s", filename)); // mLiveCache Drawable drawable = mLiveCache.get(url); if( drawable != null){ clog("loaded from live cache: " + url); } if (drawable != null) { clog("Cache hit on: " + url); // if the file age is older than the cache duration, force a refresh. // note that the file must exist, otherwise it is using a default. // not checking for file existence would do a network call on every // 404 or failed load. if (file.exists() && !checkCacheDuration(file, cacheDurationMs)) { clog("Cache hit, but file is stale. Forcing reload: " + url); drawable = null; } else { clog("Using cached image: " + url); } } if (drawable != null) { if (imageView != null) { mPendingViews.remove(imageView); imageView.setImageDrawable(drawable); } if (callback != null) { callback.onLoaded(imageView, drawable, url, true); } return; } // oh noes, at this point we definitely do not have the file available in memory // let's prepare for an asynchronous load of the image. // null it while it is downloading // since listviews reuse their views, we need to // take note of which url this view is waiting for. // This may change rapidly as the list scrolls or is filtered, etc. clog("Waiting for " + url + " " + imageView); if (imageView != null) { imageView.setImageDrawable(defaultDrawable); mPendingViews.put(imageView, url); } final ArrayList<ImageView> currentDownload = mPendingDownloads.get(url); if (currentDownload != null) { // Also, multiple vies may be waiting for this url. // So, let's maintain a list of these views. // When the url is downloaded, it sets the imagedrawable for // every view in the list. It needs to also validate that // the imageview is still waiting for this url. if (imageView != null) { currentDownload.add(imageView); } return; } final ArrayList<ImageView> downloads = new ArrayList<ImageView>(); if (imageView != null) { downloads.add(imageView); } mPendingDownloads.put(url, downloads); final int targetWidth = tw <= 0 ? Integer.MAX_VALUE : tw; // final int targetHeight = th <= 0 ? Integer.MAX_VALUE : th; final int targetHeight = Integer.MAX_VALUE; final Loader loader = new Loader() { @Override public void onDownloadComplete(UrlDownloader downloader, InputStream in, String existingFilename) { try { Assert.assertTrue(in == null || existingFilename == null); if (in == null && existingFilename == null) return; String targetFilename = filename; if (in != null) { FileOutputStream fout = new FileOutputStream(filename); copyStream(in, fout); fout.close(); clog("DownloadComplete: stream saved to cached file " + filename); } else { targetFilename = existingFilename; clog("DownloadComplete: use cached file " + existingFilename); } result = loadDrawableFromStream(context, url, targetFilename, targetWidth, targetHeight); } catch (final Exception ex) { // always delete busted files when we throw. new File(filename).delete(); if (Constants.LOG_ENABLED) Log.e(Constants.LOGTAG, "Error loading " + url, ex); } finally { // if we're not supposed to cache this thing, delete the temp file. if (downloader != null && !downloader.allowCache()) new File(filename).delete(); } } }; final Runnable completion = new Runnable() { @Override public void run() { Assert.assertEquals(Looper.myLooper(), Looper.getMainLooper()); Drawable usableResult = loader.result; if (usableResult == null) { clog("No usable result: " + url); if (mErrorResource != 0 && imageView != null){ usableResult = imageView.getResources().getDrawable(mErrorResource);; clog("fallback to error resource"); } else { usableResult = defaultDrawable; clog("fallback to default resource"); } // never cache fallback drawable // mLiveCache.put(url, usableResult); } else { // cache the result // mLiveCache.put(url, usableResult); } mPendingDownloads.remove(url); if (callback != null && imageView == null) callback.onLoaded(null, loader.result, url, false); int waitingCount = 0; for (final ImageView iv: downloads) { // validate the url it is waiting for final String pendingUrl = mPendingViews.get(iv); if (!url.equals(pendingUrl)) { clog("Ignoring out of date request to update view for " + url + " " + pendingUrl + " " + iv); continue; } waitingCount++; mPendingViews.remove(iv); if (usableResult != null) { // System.out.println(String.format("imageView: %dx%d, %dx%d", imageView.getMeasuredWidth(), imageView.getMeasuredHeight(), imageView.getWidth(), imageView.getHeight())); iv.setImageDrawable(usableResult); // System.out.println(String.format("imageView: %dx%d, %dx%d", imageView.getMeasuredWidth(), imageView.getMeasuredHeight(), imageView.getWidth(), imageView.getHeight())); // onLoaded is called with the loader's result (not what is actually used). null indicates failure. } if (callback != null && iv == imageView) callback.onLoaded(iv, loader.result, url, false); } clog("Populated: " + url + waitingCount); } }; if (file.exists()) { try { if (checkCacheDuration(file, cacheDurationMs)) { clog("File Cache hit on: " + url + ". " + (System.currentTimeMillis() - file.lastModified()) + "ms old."); final AsyncTask<Void, Void, Void> fileloader = new AsyncTask<Void, Void, Void>() { @Override protected Void doInBackground(final Void... params) { loader.onDownloadComplete(null, null, filename); return null; } @Override protected void onPostExecute(final Void result) { completion.run(); } }; executeTask(fileloader); return; } else { clog("File cache has expired. Refreshing."); } } catch (final Exception ex) { clog(ex.toString()); } } for (UrlDownloader downloader: mDownloaders) { if (downloader.canDownloadUrl(url)) { downloader.download(context, url, filename, loader, completion); return; } } imageView.setImageDrawable(defaultDrawable); } private static abstract class Loader implements UrlDownloader.UrlDownloaderCallback { Drawable result; } /* * max image size to be downloaded, in bytes * */ private static long maxImageSizeThreshold = 0; public static void setMaxImageSize(long imageSize) { clog(String.format("Max Image Size: %d", imageSize)); maxImageSizeThreshold = imageSize; mHttpDownloader.setMaxsizeToDownload(maxImageSizeThreshold); } public static long getMaxImageSize() { return maxImageSizeThreshold; } private static HttpUrlDownloader mHttpDownloader = new HttpUrlDownloader(); private static ContentUrlDownloader mContentDownloader = new ContentUrlDownloader(); private static ContactContentUrlDownloader mContactDownloader = new ContactContentUrlDownloader(); private static FileUrlDownloader mFileDownloader = new FileUrlDownloader(); private static ArrayList<UrlDownloader> mDownloaders = new ArrayList<UrlDownloader>(); public static ArrayList<UrlDownloader> getDownloaders() { return mDownloaders; } static { mDownloaders.add(mHttpDownloader); mDownloaders.add(mContactDownloader); mDownloaders.add(mContentDownloader); mDownloaders.add(mFileDownloader); } public static interface RequestPropertiesCallback { public ArrayList<NameValuePair> getHeadersForRequest(Context context, String url); } private static RequestPropertiesCallback mRequestPropertiesCallback; public static RequestPropertiesCallback getRequestPropertiesCallback() { return mRequestPropertiesCallback; } public static void setRequestPropertiesCallback(final RequestPropertiesCallback callback) { mRequestPropertiesCallback = callback; } private static UrlImageCache mLiveCache = UrlImageCache.getInstance(); static void executeTask(final AsyncTask<Void, Void, Void> task) { if (Build.VERSION.SDK_INT < Constants.HONEYCOMB) { task.execute(); } else { executeTaskHoneycomb(task); } } @TargetApi(Constants.HONEYCOMB) private static void executeTaskHoneycomb(final AsyncTask<Void, Void, Void> task) { task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); } private static Hashtable<ImageView, String> mPendingViews = new Hashtable<ImageView, String>(); private static Hashtable<String, ArrayList<ImageView>> mPendingDownloads = new Hashtable<String, ArrayList<ImageView>>(); }