I have the following problem and do not quite know how to solve it:
I am loading pictures from one device to Firebase Storage Cloud. With another device, I want to download them from Firebase Storage.
So far my implementation looks like this. Every time I open the app it re-downloads and displays all the images. I can't effectively get it to save the images in the app (NOT GALLERY) and just check if there is a new image that hasn't been downloaded yet.
What you're looking for, is to cache images on an Android device. This means that once you download it, you will not need to download it again, it will always be read from the cache.
For Android, there are a few libraries that do that. One would be Glide, and another one would be Picasso. If you're using however Kotlin and Jetpack Compose, then you can use Coil.
Related
I have a folder on my computer with many images. I want to have my app be able to load all of these images into a View. I have no problem loading one image from its url (using Picasso) but I want to know how to load a folder of them (i.e the amount of images may change).
I was thinking that I could use a Google Drive public folder to store the images, but how could I get the images from within the folder (i.e if I had the folder's URL could I use Java to "open and look inside" it)? Is there a better (and free) way than Google Drive to store the images? Maybe an imgur album or some kind of free server hosting service?
You can use Firebase or Alternative use is Imgur . You store images there and the links of images tou can store in a db (sql Lite) and just add connection of db in main.activity Here you can learn how
You should consider using Firebase for this. Upload your Images in the Firebase Storage and store the link in the database. Once done, you can show all the Images in your app and also dynamically add the images.
I have an application that allows users to display photos. It is using Glide to download them.
When a user creates a photo locally, they can see it, instantly, in the application, because the app knows where the local file is.
Eventually, though, I have to upload the photo so that it is available to other users on other devices. All devices, including the one that created the photo now use the URI for the uploaded file. That means that the first time the device that created the photo views it, after it is uploaded, there is an annoying delay while the photo is downloaded again, redundantly. (After that is is in Glide's cache)
The application uploads the photo from the local file to its location behind the globally available URI. At that time it knows both the path to to local file and the URI from which it will, eventually, be downloaded.
I would love to be able, at that point, to pre-populate Glide's cache for the download URI, with the contents of the file. No redundant download; no annoying delay.
I've poked at Glide a little bit and I just don't see how to get it to do that.
try to avoid the loss of image data during a running download from my server via a Fresco ImageRequest.
Everything runs perfect, but if the connection fails (interruption of network connectivity), the image is gone. But as I know, some Scans has been decoded (LogCat -> Intermediate image received!). But how to access them? Is there a way to save every single Scan in a seperate file? To access the latest version, if the phone goes offline?
Thx!
Fresco doesn't fully support this functionality. Please file an issue on GitHub.
I am working on one android application,in that I have to download images from web and I am showing in listview using imageloader.Next time if I am not connected to internet I have to show saved images.So that If I want to save downloaded images where I have to store.I have two ways one way I have to store in sdcard and another one is in database.Is there any alternative way to store images.Image sizes are very small
Try it with Cache? Best way to do this:
http://www.androidhive.info/2014/05/android-working-with-volley-library-1/
Volley gives you a NetworkImageView, this is a "normal" ImageView, but you can give it a URL and volley will do all the rest for you (download, or load from cache, if already loaded).
When i develop a android app with download and caching image from internet, i see many app use MemoryLruCache or DiskLruCache to cache image after download. But i want to know why they use them, why don't use the way like: download image, then save image into sd card and after get image from sd card to show it( it is manual way).
I'm newbie in android dev. So please help me to understand it?
Thanks many many times.
well downloading a list of images from url will consume time and also fill up the user memory also....so its better to dynamically load images from url and make its cache and then preview the images from cache..
I hope you did got my point....check some example of lazy loading of image