image-loading

WhatsApp developers recently improved the image loading in which immediately loading some portion of the image (getting its dimension and some pixels of the images) and then after loading the entire image, replace the placeholder with the full image: My question is, how did they implement it? Do they read the dimension of the image by reading its header (meta-data)? How about the image content? Or do they have two versions of the image at the server-side, a smaller one with low-quality which is loaded first and a bigger one which is the full image? Note that if it's the second approach then

My listView runs very smooth with just text - but as soon as I try to load in thumbnails (even from cache), it runs SOO choppy. I'm using the Universal Image Loader script The code in my ArticleEntryAdapter within public View getView(...) method: /** * PHOTOS */ ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(this.mContext) .enableLogging() .memoryCacheSize(41943040) .discCacheSize(104857600) .threadPoolSize(10) .build(); DisplayImageOptions imgDisplayOptions = new DisplayImageOptions.Builder() //.showStubImage(R.drawable.stub_image) .cacheInMemory() .cacheOnDisc() //

I'm working on an application in which i use Picasso library for image loading in my ViewPager and other ImageViews . So i want to know what happens if network connectivity is off. Does the library handle itself or do i have to check the network connectivity before loading image to views? My code: Picasso picasso = Picasso.with(getActivity()); picasso.setDebugging(true); picasso.load(downloadPath+imgDetailPhoto) .placeholder(R.drawable.no_image) .error(android.R.drawable.stat_notify_error) .into(eventImage, new Callback() { @Override public void onSuccess() { Log.d("Success...", "picasso

Here is my attempt at the ability to test if all images are loaded: for (var i = 0; i < imgCount; i ++) { loadArr[i] = false imgArr[i] = new Image() imgArr[i].src='img'+i+'.png' imgArr[i].onload = function() { loadArr[i] = true //but wait! At the end of //the loop, i is imgCount //so this doesn't work. } } The problem is that once the loop is done, the variable i is imgCount . That means all the other "loaded" flags never get set to true when their images are loaded. Is there some way to add a "loaded" property to an image, or is there some workaround to this problem? ic3b3rg You need to

How do I get error description in picasso : Picasso.with(context) .load(getUrl()) .placeholder(R.drawable.user_thumbnail_big) .error(android.R.drawable.ic_dialog_alert) .into(viewModel.userImg); Callback onError ( https://square.github.io/picasso/javadoc/index.html ) method also doesn't provide any arguments, I'm getting error images, but can't figureout why, logcat is also silent. Internet permission added. Thanks for help. EDIT issue : Picasso library stopped working today with facebook graph picture links I had the same problem I solved it through : The global instance listener receives

I want to show a fade effect when image is loading on Imageview. I am using picasso to cache image and display in image view. I have searched alot for this but couldnt find any solution. I have used earlier before and i know in some version they had .fade(int Duration) method to fade image while loading but i couldnt find this method anymore. Here is what i am doing now Picasso.with(context) .load(viewHolder.data.imageList.get(0).url) .networkPolicy(NetworkPolicy.OFFLINE) .placeholder(R.drawable.a_place_holder_list_view) .error(R.drawable.a_place_holder_list_view) .into(viewHolder.ivUser,