My app loads and display thumbnails of top movies from a server via API. I don't want to query server and reload it every-time, I use glide to display images from server url.
How do i implement this image caching so that app uses previously loaded data, even if its offline.
Is there any library or do i have to store the images using sqlite and retrieve it ?
Thank you
If you use Glide to load the images, there is an extremely simple one-liner to cache all images.
Simple add '.diskCacheStrategy(DiskCacheStrategy.SOURCE)' to your Glide loading, and it'll cache the image, and use it even if you're offline.
So it could look like this:
Glide.with(context)
.load(imageUrl)
.diskCacheStrategy(DiskCacheStrategy.SOURCE)
.into(target);
You should take a look at the introduction to Glide, on their official github repo. It mentions a lot of details about how it works.
Related
I am using the AppIntro library for an app in Android and I want to download the images from my Firebase Storage, I am familiar with Glide and I have actually used it. The problem is that I haven't found any solution on how to access the ImageView so that I can use the into() function from Glide, and I haven't found a way to get the picture as a Drawable resource.
Yes it is possible .... But you will need to implement your firebase functionality within Fragments.
You can set your own fragments in APP INTRO LIBRARY with your own
views and functionalities.
I have a little problem with an app I'm designing. I need to be able to open a high-res image (stored in the assets folder of the project), with the android gallery. I have tried many things, like put it in the drawables folder and retrieving the Uri (which gives Out of Memory error). I need to be able to have that high-res image without any type of compression because the user will need to zoom in a lot.
Any idea is welcome, thank you everyone in advance!
You have to copy your image from assets folder to external memory for the Gallery app being able to display it.
The android application is have a strict restriction of using dynamic memory, it is 16 mb. So if image is larger then at least 15mb trying to load it into memory will undoubtedly encouner with OutOfMemory error.
Use this library https://github.com/davemorrissey/subsampling-scale-image-view , which is designed, as it seems, exactely for your needs. As follows from description, the main concept is to load large images partially, just a part for current displaing.
Okay so i have pictures on server. I would like to display them in my app as a part of a ListView row. I've already made that and now I have a question regarding the dimensions of the pictures. Since its a bad idea to save my image at 48dp sizes on server (36x36, 48x48, 72x72, 96x96 ..) and then download specific one for specific DPI device. Is it possible to only save a 96x96 and then set it to an ImageView. ImageView width and width = 48dp, and scaleType= fitCenter. Are there any better ways? please help me
You're right that you need only one image size on a remote server like 96px and then in Android app just fit it to your needs like 48px.
The easiest way to implement it would be using Picasso library.
Of course, there is a Glide, with many extra features, (so it might look at the beginnig a bit complicated for beginners), but for the most of uses Picasso is a enough solution.
You can also try a new library developed by Facebook, called Fresco,if you care also about memory using but I highly recommend you a Picasso.
Here you would find nice tutorial for this library:
https://futurestud.io/blog/picasso-image-resizing-scaling-and-fit
If you would find more information about these three libraries visit this site
Fragmented Podcast - 005 – Image libraries for Android
You can use Glide or Picasso for that. It's very easy to implement.
Here is a guide that explains a little as the two libraries and do what you ask.
I am trying to load a lot of images from server using Android Volley library.
I am curious to, is there any way i can find out the % progress of the image being downloaded.
ImageLoader contains onError and onSuccess only. If not, is there any better library to provide this functionality?
In your situation, you made loading an image as download a file, ImageLoader basically perform a single-session request, does not fulfill your purpose. if you still looking for a library that advantage by Volley but offered a file downloader implementation, then you have Netroid.
you can perform a download request for your image, that make you be capable of showing the progress, once download successfully, you perform loading the local file as a Bitmap to display into ImageView. this approach was indirectly but i think it work for you.
If not what is a good way to cache images locally?
-- Note: I am coding for Android.
Picasso.
Many common pitfalls of image loading on Android are handled
automatically by Picasso:
Handling ImageView recycling and download cancelation in an adapter.
Complex image transformations with minimal memory use.
Automatic memory and disk caching.
When you want to send the image to your cloud, you could use ParseFile in conjunction with Picasso, get the bytes from the image and save() or saveInBackground().