private Bitmap tryLoadBitmap() throws TaskCancelledException {
File imageFile = getImageFileInDiscCache();
Bitmap bitmap = null;
try {
String cacheFileUri = Scheme.FILE.wrap(imageFile.getAbsolutePath());
if (imageFile.exists()) {
log(LOG_LOAD_IMAGE_FROM_DISC_CACHE);
loadedFrom = LoadedFrom.DISC_CACHE;
checkTaskNotActual();
bitmap = decodeImage(cacheFileUri);
}
if (bitmap == null || bitmap.getWidth() <= 0 || bitmap.getHeight() <= 0) {
log(LOG_LOAD_IMAGE_FROM_NETWORK);
loadedFrom = LoadedFrom.NETWORK;
String imageUriForDecoding =
options.isCacheOnDisc() && tryCacheImageOnDisc(imageFile) ? cacheFileUri : uri;
checkTaskNotActual();
bitmap = decodeImage(imageUriForDecoding);
if (bitmap == null || bitmap.getWidth() <= 0 || bitmap.getHeight() <= 0) {
fireFailEvent(FailType.DECODING_ERROR, null);
}
}
} catch (IllegalStateException e) {
fireFailEvent(FailType.NETWORK_DENIED, null);
} catch (TaskCancelledException e) {
throw e;
} catch (IOException e) {
L.e(e);
fireFailEvent(FailType.IO_ERROR, e);
if (imageFile.exists()) {
imageFile.delete();
}
} catch (OutOfMemoryError e) {
L.e(e);
fireFailEvent(FailType.OUT_OF_MEMORY, e);
} catch (Throwable e) {
L.e(e);
fireFailEvent(FailType.UNKNOWN, e);
}
return bitmap;
}
/** @return <b>true</b> - if task should be interrupted; <b>false</b> - otherwise */
private boolean delayIfNeed() {
if (options.shouldDelayBeforeLoading()) {
log(LOG_DELAY_BEFORE_LOADING, options.getDelayBeforeLoading(), memoryCacheKey);
try {
Thread.sleep(options.getDelayBeforeLoading());
} catch (InterruptedException e) {
L.e(LOG_TASK_INTERRUPTED, memoryCacheKey);
return true;
}
return isTaskNotActual();
}
return false;
}
/** @return <b>true</b> - if task should be interrupted; <b>false</b> - otherwise */
private boolean waitIfPaused() {
AtomicBoolean pause = engine.getPause();
if (pause.get()) {
synchronized (engine.getPauseLock()) {
if (pause.get()) {
log(LOG_WAITING_FOR_RESUME);
try {
engine.getPauseLock().wait();
} catch (InterruptedException e) {
L.e(LOG_TASK_INTERRUPTED, memoryCacheKey);
return true;
}
log(LOG_RESUME_AFTER_PAUSE);
}
}
}
return isTaskNotActual();
}
/** Decodes image file into Bitmap, resize it and save it back */
private boolean resizeAndSaveImage(File targetFile, int maxWidth, int maxHeight)
throws IOException {
// Decode image file, compress and re-save it
ImageSize targetImageSize = new ImageSize(maxWidth, maxHeight);
DisplayImageOptions specialOptions =
new DisplayImageOptions.Builder()
.cloneFrom(options)
.imageScaleType(ImageScaleType.IN_SAMPLE_INT)
.build();
ImageDecodingInfo decodingInfo =
new ImageDecodingInfo(
memoryCacheKey,
Scheme.FILE.wrap(targetFile.getAbsolutePath()),
targetImageSize,
ViewScaleType.FIT_INSIDE,
getDownloader(),
specialOptions);
Bitmap bmp = decoder.decode(decodingInfo);
if (bmp != null && configuration.processorForDiscCache != null) {
log(LOG_PROCESS_IMAGE_BEFORE_CACHE_ON_DISC);
bmp = configuration.processorForDiscCache.process(bmp);
if (bmp == null) {
L.e(ERROR_PROCESSOR_FOR_DISC_CACHE_NULL, memoryCacheKey);
}
}
if (bmp != null) {
OutputStream os = new BufferedOutputStream(new FileOutputStream(targetFile), BUFFER_SIZE);
try {
bmp.compress(
configuration.imageCompressFormatForDiscCache,
configuration.imageQualityForDiscCache,
os);
} finally {
IoUtils.closeSilently(os);
}
bmp.recycle();
}
return true;
}
/** @return <b>true</b> - if image was downloaded successfully; <b>false</b> - otherwise */
private boolean tryCacheImageOnDisc(File targetFile) throws TaskCancelledException {
log(LOG_CACHE_IMAGE_ON_DISC);
boolean loaded = false;
try {
loaded = downloadImage(targetFile);
if (loaded) {
int width = configuration.maxImageWidthForDiscCache;
int height = configuration.maxImageHeightForDiscCache;
if (width > 0 || height > 0) {
log(LOG_RESIZE_CACHED_IMAGE_FILE);
loaded = resizeAndSaveImage(targetFile, width, height); // TODO : process boolean result
}
configuration.discCache.put(uri, targetFile);
}
} catch (IOException e) {
L.e(e);
if (targetFile.exists()) {
targetFile.delete();
}
}
return loaded;
}
private void log(String message, Object... args) {
if (writeLogs) L.d(message, args);
}
private void log(String message) {
if (writeLogs) L.d(message, memoryCacheKey);
}
@Override
public void run() {
if (waitIfPaused()) return;
if (delayIfNeed()) return;
ReentrantLock loadFromUriLock = imageLoadingInfo.loadFromUriLock;
log(LOG_START_DISPLAY_IMAGE_TASK);
if (loadFromUriLock.isLocked()) {
log(LOG_WAITING_FOR_IMAGE_LOADED);
}
loadFromUriLock.lock();
Bitmap bmp;
try {
checkTaskNotActual();
bmp = configuration.memoryCache.get(memoryCacheKey);
if (bmp == null) {
bmp = tryLoadBitmap();
if (bmp == null) return; // listener callback already was fired
checkTaskNotActual();
checkTaskInterrupted();
if (options.shouldPreProcess()) {
log(LOG_PREPROCESS_IMAGE);
bmp = options.getPreProcessor().process(bmp);
if (bmp == null) {
L.e(ERROR_PRE_PROCESSOR_NULL, memoryCacheKey);
}
}
if (bmp != null && options.isCacheInMemory()) {
log(LOG_CACHE_IMAGE_IN_MEMORY);
configuration.memoryCache.put(memoryCacheKey, bmp);
}
} else {
loadedFrom = LoadedFrom.MEMORY_CACHE;
log(LOG_GET_IMAGE_FROM_MEMORY_CACHE_AFTER_WAITING);
}
if (bmp != null && options.shouldPostProcess()) {
log(LOG_POSTPROCESS_IMAGE);
bmp = options.getPostProcessor().process(bmp);
if (bmp == null) {
L.e(ERROR_POST_PROCESSOR_NULL, memoryCacheKey);
}
}
checkTaskNotActual();
checkTaskInterrupted();
} catch (TaskCancelledException e) {
fireCancelEvent();
return;
} finally {
loadFromUriLock.unlock();
}
DisplayBitmapTask displayBitmapTask =
new DisplayBitmapTask(bmp, imageLoadingInfo, engine, loadedFrom);
displayBitmapTask.setLoggingEnabled(writeLogs);
runTask(displayBitmapTask, options.isSyncLoading(), handler);
}
