In my android app, I am using Universal Image Loader to display images.
I specified in the option to caching images on Disc. But sometimes there are images that I do not want to cache on the disc. Is there a way to specify if it should cache on disc or not for each time I download an image and not only in the initialization?
Thanks
I just created 2 options one with caching and one without and used each one accordingly.
Will leave it here in case.
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I'm using Picasso to initially download images of products to my app from a server. Since the images aren't changing nearly at all for a certain product, I save the images to the disk from the ImageView. In the app I have to display these images all over again in different sizes. To do so I'm using Picasso again, loading the saved file into an ImageView and do fit().centercrop() so I don't get any OutofMemory issues.
Since Picasso is also capable of using OkHttp's cache and doing the caching by its own, I want to know:
Are there any advantages about letting Picasso do the caching, over saving it to storage manually and handing it over again to Picasso later?
And would it be a good way to store the shrinked image (after using .fit()) as a new file so the calculation hasn't to be done all the time.
Lets consider the following, I have an app with several dozen photos I want to show the user at any given time.
Right now I'm creating multiple files for each image, sizing them for different screen sizes and storing them in their respective drawable folders.
It's increasing the size of my app dramatically.
So here is my question: Is it possible to store the images on a server and use an image library like Picasso, Fresco or something else (open to anything) to fetch that image and scale it down for the device it's running on without risking running out of memory?
I'm worried that fetching a large image, loading it into memory and then resizing it will cause the same problem as trying to display it on older devices with little memory available to them.
You can write methods to request different images sizes from your server based on client info. Just write a method to measure the screen size and then request the appropriate image based on a URL endpoint (like http://myimageserver.com/images/ldpi/image1.png).
You can do optimization post-download, such as scaling, before saving the image to a local file store.
Using a reputable image loading library is a valid method (my own favourite is Glide).
The answer to your question really depends on the number of images you want to show! If there are lots, then yes storing them on a server is probably best, but also the most time-consuming and expensive (both in time and money).
Your other (easier) option is to keep the originals in the assets folder, and use your image loader to scale and load them for you. The correct path for an image in your assets folder is file:///android_asset/your_image_here.jpg. This way, you're only keeping one version of each photo in your apk and they'll load much faster.
I'm using Universal Image Loader for image loading, In the document I can't find a way to set different DiskCache for image display, the DiskCache directory is set by ImageLoader.getInstance().init(), which is global.
But I want to store some images in a separate DiskCache because I don't want it to be removed when LruDiskCache is full or cleared manually, I there anyway to do this?
I am afraid UIL can't store specific image files intently. If I guess right, these images that you want to store in separate directory are used frequently. But, maybe you don't understand the mechanism of LruDiskCache which means "least recently used disk cache". Which means files used frequently would at the header of the queue all the time. So, if you use LruDiskCache, these images used frequently will be always stored in the disk and not be deleted or cleared. So, your requirement has been fulfilled when you use LruDiskCache.
I have an app where people can set pictures as wallpaper but its really slow because pictures are very big. This app load pictures and then when i want to see it again it has to load again.
What to do to make it faster? I use Json service. My pictures are from server. i am using universal image loader.
Theres 2 types of cache in android, the memory cache and the disk cache. You should use picasso its a library that implement both and is very easy to use (1 line of code).
Using Universal Image Loader, is it possible to directly save images to disk and reuse those images between different runs of the application?
I know imageLoader.displayImage(imageURI, itemHolder.image, options); gets images from the cache the second time, but if you exit the app the cache is removed.
I want the display image method to save the image to a permanent location and use that location every time the app calls that method.
Is this possible using Universal Image Loader or do I need to find another way?
you need to download images to certain folder at first start up and after that you can load images using same method and you need to pass file location instead of url like:
imageLoader.displayImage("file:///sdcard/test.png", itemHolder.image, options);
Hope this will help you