@Override
public Void call() {
if (imagesManager.debug) {
Log.d(TAG, "Start image task");
}
try {
if (!imagesManager.waitForPause()) {
// interrupted
cancel();
return null;
}
final ImageResult result = request.readImage();
if (result == null) {
throw new IllegalStateException("Image is not returned!");
}
safeImageSet(result);
finish();
} catch (final MalformedURLException e) {
Log.e(TAG, "Bad URL: " + request.url + ". Loading canceled.", e);
error(e);
} catch (final IOException e) {
if (imagesManager.debug) {
Log.e(TAG, "IO error for " + request.url + ": " + e.getMessage());
}
error(e);
} catch (final Exception e) {
Log.e(TAG, "Cannot load image " + request.url, e);
error(e);
} finally {
final boolean removed = imagesManager.currentLoads.remove(request.getKey(), this);
if (imagesManager.debug) {
Log.d(TAG, "Current loaders count: " + imagesManager.currentLoads.size());
if (!removed) {
Log.w(TAG, "Incorrect loader in currents for " + request.getKey());
}
}
}
return null;
}
private Bitmap prepare(final Bitmap map) {
int dstW = request.getRequiredWidth(), dstH = request.getRequiredHeight();
if (dstW <= 0 || dstH <= 0 || request.isSkipScaleBeforeMemCache()) {
if (imagesManager.debug) {
Log.d(
TAG,
"Skip scaling for "
+ request.getKey()
+ " skip flag: "
+ request.isSkipScaleBeforeMemCache());
}
return map;
}
final int w = map.getWidth(), h = map.getHeight();
if (w <= dstW && h <= dstH) {
return map;
}
final double ratio = (double) w / h;
if (w > h) {
dstH = (int) (dstW / ratio);
} else {
dstW = (int) (dstH * ratio);
}
if (dstW <= 0 || dstH <= 0) {
return map;
}
final Bitmap scaled = Bitmap.createScaledBitmap(map, dstW, dstH, true);
scaled.setDensity(imagesManager.getResources().getDisplayMetrics().densityDpi);
return scaled;
}
// main thread
public void removeTarget(final ImageConsumer consumer) {
if (imagesManager.debug) {
Log.d(TAG, "Cancel request: " + request.getKey() + "\nLoader: " + this);
}
consumer.onCancel(request.url);
synchronized (targets) {
targets.remove(consumer);
if (targets.isEmpty()) {
if (!future.cancel(true)) {
if (imagesManager.debug) {
Log.d(TAG, "Can't cancel task so let's try to remove loader manually");
}
imagesManager.currentLoads.remove(request.getKey(), this);
}
}
}
}
// worker thread
private void safeImageSet(final ImageResult result) {
if (imagesManager.debug) {
Log.v(ImagesManager.TAG, "Post setting drawable for " + request.getKey());
}
synchronized (targets) {
if (this.result != null) {
throw new IllegalStateException("Result is already set");
}
memCacheImage(result);
this.result = result;
}
post(
new Runnable() {
@Override
public void run() {
if (imagesManager.debug) {
Log.v(TAG, "Set drawable for " + request.getKey());
}
final ArrayList<ImageConsumer> targets = ImageLoader.this.targets;
final int count = targets.size();
if (count > 0) {
//noinspection ForLoopReplaceableByForEach
for (int i = 0; i < count; i++) {
final ImageConsumer imageHolder = targets.get(i);
if (imagesManager.debug) {
Log.d(TAG, "Try to set " + imageHolder + " - " + request.getKey());
}
setToConsumer(imageHolder, result);
}
} else if (imagesManager.debug) {
Log.w(TAG, "set drawable: have no targets in list");
}
}
});
}