I am making a flutter app which loads about 700+ image from Cloud Storage through Firebase. Though, I am using pagination, the app still crashes sometimes on low end devices(does not crash on emulator). I have already compressed all my images, still sometimes it crashes. Is there a way to compress images when we load them from firestore to display only low quality thumbnails. It's a wallpaper app. So what I want to do is, display low quality images when loading all of them to reduce work load on the device and then use the original quality when setting them as wallpaper.
Note: I assume you're loading the images from Cloud Storage through Firebase, and not from Firestore itself. Firestore is a document database, while Cloud Storage is used for storing files. While both are part of Firebase, it's best not to confuse them.
There is no built-in functionality to generate thumbnails in Firebase or Cloud Storage. But there is an extension to resize images that you can enable, and that will then generate a thumbnail (or your specification) when new images are uploaded.
Related
I have a flutter app that is a menu for a restaurant. Now the problem is that I want to get the pictures from firebase. Currently, if you open the app, the pictures take time to load and you can see that with your eyes, it is a bit annoying and not practical regarding bandwidth data usage.
Is there any chance I can cache the images when I get them from firebase and than appear instantly? I request the links of the images once the page is open using a future and display them with a CachedNetworkImageProvider() with the image URL but that still takes time to load the images. Is there a way to download all the data in the firebase at once when you open the app and not check every time you open the app?
for all apps that require fetching images from a remote location, what i have been doing so far is download the image locally and use the local image instead of the remote one if it exists locally, from my knowledge cachedNetworkImage only caches the image after fetching when the app is currently running and refetches the image when the user restarts the app.
Please if you do find another way to cache images that would be cool and remove a lot of boiler plate code, please do post it, thanks.
I am building a flutter app that will contain a lot of animated pictures and 3d objects. Many of those animations will be choosen based on the user choice of gender when registering for the first time. So one of the issues with flutter is that it normally takes a lot of storage and with this animations its gonna need even more storage. So I was wondering if there is a way to keep those animations online in some cloud or in firestore DB and then when the user register for the first time I download it and assign it to the UI to be permenantly there instead of like storing all these Gifs in the assets.
Any suggestiong to avoid storing all of the animations and images in the assets.
Since you said you have lots of images, I would suggest you use a dedicated server to store your images.
If you haven't any dedicated server, then you should use firebase to store your images.
You should follow this link to fetch images from firebase.
Also, you should follow this link to store your images in the cache & in the future fetch from the cache easily.
I have an application that uses a lot of images. I would like to store these images outside the ios/android device. I decided to store some of the images in firebase storage. How can I get images using storage? Like this
Image.asset(brand.model[0].model_image[index].image,
fit: BoxFit.fill),
Its better to store all these images in your app directory it will increase your app size but the images will load faster as they will be in the app itself plus help in reducing the data usage for the user as the app will not download the images on app launch but still if you want to keep the images in a outside server Firebase Storage will be the best use.
You can keep the assets separately in a folder called assets and you can use that from there. The only thing you need to do is specify the path in pubsec.yaml file to access the images.
I would always do it like.
assets
|_____images
|_____svgs
|_____audios
Hope this will help you to keep it organized.
I'm also into Flutter and Firebase, trying to keep the actual application as small as possible. I could write everything out right here, but the creators of FlutterFire have a website that explains every step in detail. This link below will direct you to the first step of using cloud storage.
Link: FlutterFire Cloud Storage
I know the various ways to save a UIImage to the photo library:
UIImageWriteToSavedPhotosAlbum
ALAssetsLibrary
However, my images are HUGE (60mb+), so bringing them into memory is not possible. I can download the images by streaming them to disk, and even use imageWithContentsOfFile to take a peek (although that is kind of unnecessary given screen size).
But I want the user to be able to save these images for later. Is there anyway for me to get these large images into the photo library? Do I just have to keep them stored locally inside the app sandbox?
I believe that there is no point at storing them at the photo library, since it is designed to be viewed on the device and theres no point at viewing an image so big. If you want to let the user see the image then i suggest you create a preview and save THAT version into the photo library. If you want to let the user transfer them from the device to the computer there is a special folder in your app bundle which will allow those pictures to appear when using itunes and selecting your application. then he can transfer those pictures to his computer. Also could you elaborate on the characteristics of the images? format, dimentions, purpose, etc.
My app allows user to obtain picture/image from camera/photo gallery and then the app will upload the images to remote storage. Since the thumbnail images of those images will be used in some scenarios, I need to generate the thumbnail images.
The questions are
should the thumbnail images be generated by the app at the time when the original/raw image is obtained?
is it achievable to upload a raw image and at least 2 of its thumbnail images at the same time from the app to the remote storage - let's say its Amazon S3 or Google App Engine
is there any sample code out there that does the image transformation on iPhone?
I think you should, and put a progress indicator on top to tell your user that "please wait, I'm generating thumbnails".
I don't think at the same time is appropriate for you. Instead, you should try to upload them (2 thumbnails and 1 raw) in a serial manner. That is, "try 1st thumbnail, if succeed, try 2nd thumbnail...",since the internet connection for a mobile device like iPhone could be unstable. Requests-timing-out does happen, therefore it's better to always make sure you have finished the previous request before you start the next one.
I think three20's TTThumbsViewController (or TTPhotoViewController) has done a good job in transforming original photos into square-shaped thumbnails. Maybe you should take a look at their source code.
btw, as for uploading photos to servers, I once used the ASIFormDataRequest to post my photos to a server. It worked pretty well.
Hope it helps. :-)