@Override
@NonNull
public CacheDownloadLoader.Result loadInBackground() {
if (mUri == null) {
return Result.nullInstance();
}
final String scheme = mUri.getScheme();
File cacheFile = null;
if ("http".equals(scheme) || "https".equals(scheme)) {
final String uriString = mUri.toString();
if (uriString == null) return Result.nullInstance();
cacheFile = mDiskCache.get(uriString);
if (isValid(cacheFile)) {
return Result.getInstance(CacheProvider.getCacheUri(uriString));
}
try {
// from SD cache
ContentLengthInputStream cis;
final InputStream is = mDownloader.get(uriString);
if (is == null) return Result.nullInstance();
try {
final long length = is.available();
mHandler.post(new DownloadStartRunnable(this, mListener, length));
cis = new ContentLengthInputStream(is, length);
mDiskCache.save(
uriString,
cis,
new IoUtils.CopyListener() {
@Override
public boolean onBytesCopied(int current, int total) {
mHandler.post(new ProgressUpdateRunnable(mListener, current, total));
return !isAbandoned();
}
});
mHandler.post(new DownloadFinishRunnable(this, mListener));
} finally {
Utils.closeSilently(is);
}
cacheFile = mDiskCache.get(uriString);
if (isValid(cacheFile)) {
return Result.getInstance(CacheProvider.getCacheUri(uriString));
} else {
mDiskCache.remove(uriString);
throw new IOException();
}
} catch (final Exception e) {
mHandler.post(new DownloadErrorRunnable(this, mListener, e));
return Result.getInstance(e);
}
}
return Result.getInstance(mUri);
}
protected Result decodeBitmapOnly(final File file, boolean useDecoder) {
final String path = file.getAbsolutePath();
final BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, o);
final int width = o.outWidth, height = o.outHeight;
if (width <= 0 || height <= 0) return Result.getInstance(file, null);
o.inJustDecodeBounds = false;
o.inSampleSize = BitmapUtils.computeSampleSize(mFallbackSize / Math.max(width, height));
final Bitmap bitmap = BitmapFactory.decodeFile(path, o);
return Result.getInstance(useDecoder, bitmap, o, Exif.getOrientation(file), file);
}
@Override
public TileImageLoader.Result loadInBackground() {
if (mUri == null) {
return Result.nullInstance();
}
final String scheme = mUri.getScheme();
if ("http".equals(scheme) || "https".equals(scheme)) {
final String url = mUri.toString();
if (url == null) return Result.nullInstance();
File cacheFile = mDiskCache.get(url);
if (cacheFile != null) {
final int cachedValidity = ImageValidator.checkImageValidity(cacheFile);
if (ImageValidator.isValid(cachedValidity)) {
// The file is corrupted, so we remove it from
// cache.
return decodeBitmapOnly(
cacheFile, ImageValidator.isValidForRegionDecoder(cachedValidity));
}
}
try {
// from SD cache
final InputStream is = mDownloader.getStream(url, new AccountExtra(mAccountId));
if (is == null) return Result.nullInstance();
try {
final long length = is.available();
mHandler.post(new DownloadStartRunnable(this, mListener, length));
mDiskCache.save(
url,
is,
new IoUtils.CopyListener() {
@Override
public boolean onBytesCopied(int current, int total) {
mHandler.post(new ProgressUpdateRunnable(mListener, current));
return !isAbandoned();
}
});
mHandler.post(new DownloadFinishRunnable(this, mListener));
} finally {
IoUtils.closeSilently(is);
}
cacheFile = mDiskCache.get(url);
final int downloadedValidity = ImageValidator.checkImageValidity(cacheFile);
if (ImageValidator.isValid(downloadedValidity)) {
// The file is corrupted, so we remove it from
// cache.
return decodeBitmapOnly(
cacheFile, ImageValidator.isValidForRegionDecoder(downloadedValidity));
} else {
mDiskCache.remove(url);
throw new IOException();
}
} catch (final Exception e) {
mHandler.post(new DownloadErrorRunnable(this, mListener, e));
return Result.getInstance(cacheFile, e);
}
} else if (ContentResolver.SCHEME_FILE.equals(scheme)) {
final File file = new File(mUri.getPath());
try {
return decodeBitmapOnly(
file, ImageValidator.isValidForRegionDecoder(ImageValidator.checkImageValidity(file)));
} catch (final Exception e) {
return Result.getInstance(file, e);
}
}
return Result.nullInstance();
}
