private void processImageResponse(
ImageResponse response, String graphObjectId, ImageView imageView) {
pendingRequests.remove(graphObjectId);
if (response.getError() != null) {
callOnErrorListener(response.getError());
}
if (imageView == null) {
// This was a pre-fetch request.
if (response.getBitmap() != null) {
// Is the cache too big?
if (prefetchedPictureCache.size() >= MAX_PREFETCHED_PICTURES) {
// Find the oldest one and remove it.
String oldestId = prefetchedProfilePictureIds.remove(0);
prefetchedPictureCache.remove(oldestId);
}
prefetchedPictureCache.put(graphObjectId, response);
}
} else if (graphObjectId.equals(imageView.getTag())) {
Exception error = response.getError();
Bitmap bitmap = response.getBitmap();
if (error == null && bitmap != null) {
imageView.setImageBitmap(bitmap);
imageView.setTag(response.getRequest().getImageUri());
}
}
}
protected void populateGraphObjectView(View view, T graphObject) {
String id = getIdOfGraphObject(graphObject);
view.setTag(id);
CharSequence title = getTitleOfGraphObject(graphObject);
TextView titleView = (TextView) view.findViewById(R.id.com_facebook_picker_title);
if (titleView != null) {
titleView.setText(title, TextView.BufferType.SPANNABLE);
}
CharSequence subtitle = getSubTitleOfGraphObject(graphObject);
TextView subtitleView = (TextView) view.findViewById(R.id.picker_subtitle);
if (subtitleView != null) {
if (subtitle != null) {
subtitleView.setText(subtitle, TextView.BufferType.SPANNABLE);
subtitleView.setVisibility(View.VISIBLE);
} else {
subtitleView.setVisibility(View.GONE);
}
}
if (getShowCheckbox()) {
CheckBox checkBox = (CheckBox) view.findViewById(R.id.com_facebook_picker_checkbox);
updateCheckboxState(checkBox, isGraphObjectSelected(id));
}
if (getShowPicture()) {
URI pictureURI = getPictureUriOfGraphObject(graphObject);
if (pictureURI != null) {
ImageView profilePic = (ImageView) view.findViewById(R.id.com_facebook_picker_image);
// See if we have already pre-fetched this; if not, download it.
if (prefetchedPictureCache.containsKey(id)) {
ImageResponse response = prefetchedPictureCache.get(id);
profilePic.setImageBitmap(response.getBitmap());
profilePic.setTag(response.getRequest().getImageUri());
} else {
downloadProfilePicture(id, pictureURI, profilePic);
}
}
}
}
private void downloadProfilePicture(
final String profileId, URI pictureURI, final ImageView imageView) {
if (pictureURI == null) {
return;
}
// If we don't have an imageView, we are pre-fetching this image to store in-memory because we
// think the user might scroll to its corresponding list row. If we do have an imageView, we
// only want to queue a download if the view's tag isn't already set to the URL (which would
// mean
// it's already got the correct picture).
boolean prefetching = imageView == null;
if (prefetching || !pictureURI.equals(imageView.getTag())) {
if (!prefetching) {
// Setting the tag to the profile ID indicates that we're currently downloading the
// picture for this profile; we'll set it to the actual picture URL when complete.
imageView.setTag(profileId);
imageView.setImageResource(getDefaultPicture());
}
ImageRequest.Builder builder =
new ImageRequest.Builder(context.getApplicationContext(), pictureURI)
.setCallerTag(this)
.setCallback(
new ImageRequest.Callback() {
@Override
public void onCompleted(ImageResponse response) {
processImageResponse(response, profileId, imageView);
}
});
ImageRequest newRequest = builder.build();
pendingRequests.put(profileId, newRequest);
ImageDownloader.downloadAsync(newRequest);
}
}