@Override
public void onDestroyView() {
super.onDestroyView();
if (mAdapter != null) {
mAdapter.forceStopLoadingIfNecessary();
}
GuiUtils.removeGlobalOnLayoutListener(photosGrid, photosGridListener);
}
/**
* The main process method, which will be called by the ImageWorker in the AsyncTaskEx background
* thread.
*
* @param data The data to load the bitmap, in this case, a regular http URL
* @param imageWidth
* @param imageHeight
* @return The downloaded and resized bitmap
*/
protected Bitmap processBitmap(String data, int imageWidth, int imageHeight) {
if (BuildConfig.DEBUG) {
Log.d(TAG, "processBitmap - " + data);
}
// Download a bitmap, write it to a file
final File f = downloadBitmap(mContext, data);
if (f != null) {
try {
// Return a sampled down version
return decodeSampledBitmapFromFile(f.toString(), imageWidth, imageHeight, cornerRadius);
} catch (Exception ex) {
GuiUtils.error(TAG, ex);
}
}
return null;
}
@SuppressWarnings("unchecked")
@Override
protected Bitmap processBitmap(Object data) {
FlowObjectToStringWrapper<Photo> fo = (FlowObjectToStringWrapper<Photo>) data;
Photo imageData = fo.getObject();
double ratio =
imageData.getHeight() == 0
? 1
: (float) imageData.getWidth() / (float) imageData.getHeight();
int height = mImageHeight;
int width = (int) (height * ratio);
Bitmap result = null;
try {
imageData = PhotoUtils.validateUrlForSizeExistAndReturn(imageData, thumbSize);
result = super.processBitmap(fo.toString(), width, height);
} catch (Exception e) {
GuiUtils.noAlertError(TAG, e);
}
return result;
}
/**
* Download a bitmap from a URL, write it to a disk and return the File pointer. This
* implementation uses a simple disk cache.
*
* @param context The context to use
* @param urlString The URL to fetch
* @return A File pointing to the fetched bitmap
*/
public static File downloadBitmap(Context context, String urlString) {
final File cacheDir = DiskLruCache.getDiskCacheDir(context, HTTP_CACHE_DIR);
if (CommonUtils.TEST_CASE && urlString == null) {
return null;
}
DiskLruCache cache = DiskLruCache.openCache(context, cacheDir, HTTP_CACHE_SIZE);
// #273 additional checks
if (cache == null) {
CommonUtils.debug(TAG, "Failed to open http cache %1$s", cacheDir.getAbsolutePath());
TrackerUtils.trackBackgroundEvent("httpCacheOpenFail", cacheDir.getAbsolutePath());
// cache open may fail if there are not enough free space.
// application will try to clear that cache dir and open cache again
DiskLruCache.clearCache(context, HTTP_CACHE_DIR);
// cache clear attempt finished. Let's try again to open cache
cache = DiskLruCache.openCache(context, cacheDir, HTTP_CACHE_SIZE);
if (cache == null) {
CommonUtils.debug(
TAG, "Failed to open http cache second time %1$s", cacheDir.getAbsolutePath());
// still unsuccessful. We can't download that bitmap. Let's warn
// user about this.
GuiUtils.alert(R.string.errorCouldNotStoreDownloadablePhotoNotEnoughSpace);
TrackerUtils.trackBackgroundEvent("httpCacheSecondOpenFail", cacheDir.getAbsolutePath());
return null;
}
}
final File cacheFile = new File(cache.createFilePath(urlString));
if (cache.containsKey(urlString)) {
TrackerUtils.trackBackgroundEvent("httpCachHit", TAG);
if (BuildConfig.DEBUG) {
Log.d(TAG, "downloadBitmap - found in http cache - " + urlString);
}
return cacheFile;
}
if (!CommonUtils.checkLoggedInAndOnline(true)) {
return null;
}
if (BuildConfig.DEBUG) {
Log.d(TAG, "downloadBitmap - downloading - " + urlString);
}
Utils.disableConnectionReuseIfNecessary();
HttpURLConnection urlConnection = null;
BufferedOutputStream out = null;
try {
long start = System.currentTimeMillis();
final URL url = new URL(urlString);
urlConnection = (HttpURLConnection) url.openConnection();
final InputStream in =
new BufferedInputStream(urlConnection.getInputStream(), Utils.IO_BUFFER_SIZE);
out = new BufferedOutputStream(new FileOutputStream(cacheFile), Utils.IO_BUFFER_SIZE);
int b;
while ((b = in.read()) != -1) {
out.write(b);
}
TrackerUtils.trackDataLoadTiming(System.currentTimeMillis() - start, "downloadBitmap", TAG);
return cacheFile;
} catch (final IOException e) {
GuiUtils.noAlertError(TAG, "Error in downloadBitmap", e);
} finally {
if (urlConnection != null) {
urlConnection.disconnect();
}
if (out != null) {
try {
out.close();
} catch (final IOException e) {
GuiUtils.noAlertError(TAG, "Error in downloadBitmap", e);
}
}
}
return null;
}