/** Check weather this imageTask has cache Drawable data. */
public boolean queryCache(ImageTask imageTask, CubeImageView imageView) {
if (null == mImageProvider) {
return false;
}
BitmapDrawable drawable = mImageProvider.getBitmapFromMemCache(imageTask);
if (imageTask.getStatistics() != null) {
imageTask.getStatistics().s0_afterCheckMemoryCache(drawable != null);
}
if (drawable == null) {
return false;
}
if (DEBUG) {
CLog.d(
LOG_TAG,
MSG_HIT_CACHE,
imageTask,
drawable.getIntrinsicWidth(),
drawable.getIntrinsicHeight());
}
imageTask.addImageView(imageView);
imageTask.onLoadTaskFinish(drawable, mImageLoadHandler);
return true;
}
@Override
public void onCancel() {
if (DEBUG) {
CLog.d(LOG_TAG, MSG_TASK_CANCEL, this, mImageTask);
}
mImageLoader.getImageProvider().cancelTask(mImageTask);
mImageTask.onLoadTaskCancel();
mImageLoader.mLoadWorkList.remove(mImageTask.getIdentityKey());
}
public ImageTask createImageTask(ImageLoadRequest request) {
ImageTask imageTask = ImageTask.obtain();
if (imageTask == null) {
imageTask = new ImageTask();
}
imageTask.renewForRequest(request);
return imageTask;
}
/** Load the image in advance. */
public void preLoadImages(String[] urls) {
int len = urls.length;
for (int i = 0; i < len; i++) {
ImageLoadRequest request = new ImageLoadRequest(urls[i]);
final ImageTask imageTask = createImageTask(request);
imageTask.setIsPreLoad();
addImageTask(imageTask, null);
}
}
/**
* Create an ImageTask. You can override this method to return a customized {@link ImageTask}.
*
* @param url
* @param requestWidth
* @param requestHeight
* @param imageReuseInfo
* @return
*/
@Deprecated
public ImageTask createImageTask(
String url, int requestWidth, int requestHeight, ImageReuseInfo imageReuseInfo) {
ImageTask imageTask = ImageTask.obtain();
if (imageTask == null) {
imageTask = new ImageTask();
}
ImageLoadRequest imageLoadRequest =
new ImageLoadRequest(url, requestWidth, requestHeight, -1, imageReuseInfo);
imageTask.renewForRequest(imageLoadRequest);
return imageTask;
}
@Override
public void onFinish(boolean canceled) {
if (DEBUG) {
CLog.d(LOG_TAG, MSG_TASK_FINISH, this, mImageTask, mImageLoader.mExitTasksEarly);
}
if (mImageLoader.mExitTasksEarly) {
return;
}
if (!isCancelled() && !mImageLoader.mExitTasksEarly) {
mImageTask.onLoadTaskFinish(mDrawable, mImageLoader.mImageLoadHandler);
}
mImageLoader.mLoadWorkList.remove(mImageTask.getIdentityKey());
}
@Override
public void doInBackground() {
if (DEBUG) {
CLog.d(LOG_TAG, MSG_TASK_DO_IN_BACKGROUND, this, mImageTask);
}
if (mImageTask.getStatistics() != null) {
mImageTask.getStatistics().s1_beginLoad();
}
Bitmap bitmap = null;
// Wait here if work is paused and the task is not cancelled
synchronized (mImageLoader.mPauseWorkLock) {
while (mImageLoader.mPauseWork && !isCancelled()) {
try {
if (DEBUG) {
CLog.d(LOG_TAG, MSG_TASK_WAITING, this, mImageTask);
}
mImageLoader.mPauseWorkLock.wait();
} catch (InterruptedException e) {
}
}
}
// If this task has not been cancelled by another
// thread and the ImageView that was originally bound to this task is still bound back
// to this task and our "exit early" flag is not set then try and fetch the bitmap from
// the cache
if (!isCancelled()
&& !mImageLoader.mExitTasksEarly
&& (mImageTask.isPreLoad() || mImageTask.stillHasRelatedImageView())) {
try {
bitmap =
mImageLoader.mImageProvider.fetchBitmapData(
mImageLoader, mImageTask, mImageLoader.mImageReSizer);
if (DEBUG) {
CLog.d(LOG_TAG, MSG_TASK_AFTER_fetchBitmapData, this, mImageTask, isCancelled());
}
mDrawable =
mImageLoader.mImageProvider.createBitmapDrawable(mImageLoader.mResources, bitmap);
mImageLoader.mImageProvider.addBitmapToMemCache(mImageTask.getIdentityKey(), mDrawable);
} catch (Exception e) {
e.printStackTrace();
} catch (OutOfMemoryError e) {
e.printStackTrace();
}
}
}
private void tryLoadImage() {
if (TextUtils.isEmpty(mUrl)) {
return;
}
int width = getWidth();
int height = getHeight();
ViewGroup.LayoutParams lyp = getLayoutParams();
boolean isFullyWrapContent =
lyp != null
&& lyp.height == LayoutParams.WRAP_CONTENT
&& lyp.width == LayoutParams.WRAP_CONTENT;
// if the view's bounds aren't known yet, and this is not a wrap-content/wrap-content
// view, hold off on loading the image.
if (width == 0 && height == 0 && !isFullyWrapContent) {
return;
}
if (mSpecifiedWidth != 0) {
width = mSpecifiedWidth;
}
if (mSpecifiedHeight != 0) {
height = mSpecifiedHeight;
}
// 1. Check the previous ImageTask related to this ImageView
if (null != mImageTask) {
// duplicated ImageTask, return directly.
if (mImageTask.isLoadingThisUrl(mUrl)) {
return;
}
// ImageView is reused, detach it from the related ImageViews of the previous ImageTask.
else {
mImageLoader.detachImageViewFromImageTask(mImageTask, this);
}
}
// 2. Let the ImageView hold this ImageTask. When ImageView is reused next time, check it in
// step 1.
ImageTask imageTask = mImageLoader.createImageTask(mUrl, width, height, mImageReuseInfo);
mImageTask = imageTask;
// 3. Query cache, if hit, return at once.
boolean hitCache = mImageLoader.queryCache(imageTask, this);
if (hitCache) {
return;
} else {
mImageLoader.addImageTask(mImageTask, this);
}
}
/**
* Add the ImageTask into loading list.
*
* @param imageTask
* @param imageView
*/
public void addImageTask(ImageTask imageTask, CubeImageView imageView) {
if (!mHasBeenAddedToComponentManager) {
CLog.w(LOG_TAG, "ImageLoader has not been add to a Component Manager.", this);
}
LoadImageTask runningTask = mLoadWorkList.get(imageTask.getIdentityKey());
if (runningTask != null) {
if (imageView != null) {
if (DEBUG) {
CLog.d(LOG_TAG, MSG_ATTACK_TO_RUNNING_TASK, imageTask, runningTask.getImageTask());
}
runningTask.getImageTask().addImageView(imageView);
runningTask.getImageTask().notifyLoading(mImageLoadHandler, imageView);
}
return;
} else {
imageTask.addImageView(imageView);
}
imageTask.onLoading(mImageLoadHandler);
LoadImageTask loadImageTask = createLoadImageTask(imageTask);
mLoadWorkList.put(imageTask.getIdentityKey(), loadImageTask);
mImageTaskExecutor.execute(loadImageTask);
}
/**
* Detach the ImageView from the ImageTask.
*
* @param imageTask
* @param imageView
*/
public void detachImageViewFromImageTask(ImageTask imageTask, CubeImageView imageView) {
imageTask.removeImageView(imageView);
if (imageTask.isLoading()) {
if (!imageTask.isPreLoad() && !imageTask.stillHasRelatedImageView()) {
LoadImageTask task = mLoadWorkList.get(imageTask.getIdentityKey());
if (task != null) {
task.cancel();
}
if (DEBUG) {
CLog.d(LOG_TAG, "%s previous work is cancelled.", imageTask);
}
}
}
if (!imageTask.stillHasRelatedImageView()) {
imageTask.tryToRecycle();
}
}
public void onPause() {
super.onPause();
if (task != null) task.cancel();
}
private void setTask() {
if (task != null) task.cancel();
task = new ImageTask();
timer.schedule(task, 5000, 5000);
}
