@Override
protected void onPostExecute(Bitmap bitmap) {
if (isCancelled()) {
bitmap = null;
}
if (imageViewReference != null && bitmap != null) {
final ImageView imageView = imageViewReference.get();
final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);
if (this == bitmapWorkerTask && imageView != null) {
imageView.setImageBitmap(bitmap);
}
} else {
Savelog.e(TAG, "Unable to load " + key);
if (hostFragmentReference != null) {
ViewerFragment hostFragment = hostFragmentReference.get();
Activity activity = hostFragment.getActivity();
if (activity != null) {
if (bitmap == null) {
Savelog.e(TAG, "bitmap is null. Possibly due to OOM error");
Toast.makeText(
hostFragment.getActivity(),
"Try to refresh this page by scrolling slowly.",
Toast.LENGTH_SHORT)
.show();
} else {
Savelog.d(TAG, debug, "bitmap is not null for key " + key);
}
}
}
}
}
// once complete, see if ImageView is still around and set up bitmap
@Override
protected void onPostExecute(FileLoader fileLoader) {
super.onPostExecute(fileLoader);
if (isCancelled()) {
fileLoader = null;
}
if (hostFragmentReference != null) {
final ViewerFragment hostFragment = hostFragmentReference.get();
if (hostFragment != null) {
if (fileLoader != null) {
hostFragment.mFileLoader = fileLoader;
Toast.makeText(
hostFragment.getActivity(),
"Found " + fileLoader.getNumberOfPages() + " pages",
Toast.LENGTH_SHORT)
.show();
} else {
hostFragment.mFileLoader = null;
if (err != null) {
Savelog.e(TAG, "Cannot fetch pdf" + "\n" + Savelog.getStack(err));
}
Toast.makeText(hostFragment.getActivity(), "Data unavailable", Toast.LENGTH_SHORT)
.show();
}
// Callback upon finished fetching.
hostFragment.onFetchingCompleted();
// Detach host fragment from this task.
hostFragment.mFetcherTask = null;
}
}
Savelog.d(TAG, debug, "AsyncTask completed.");
}
@Override
protected FileLoader doInBackground(Object... arg0) {
FileLoader fileLoader = new FileLoader(filename);
try {
fileLoader.setup();
} catch (Exception e) {
err = e;
Savelog.e(TAG, "Asyntask rendering unsuccessful." + "\n" + Savelog.getStack(e));
}
return fileLoader;
}
@Override
protected Bitmap doInBackground(Object... params) {
Bitmap bitmap = null;
key = (String) params[0];
int position = (Integer) params[1];
Savelog.d(TAG, debug, "AsyncTask trying to load bitmap from cache");
if (fileLoader == null) {
Savelog.e(TAG, "file loader is null.");
} else {
int pageNumberNeeded = position + 1;
bitmap = fileLoader.load(appContext, maxWidth, pageNumberNeeded, pageRange);
}
// bitmap could be null if oom error or cache flushed out.
return bitmap;
}
