I tiring to made app that get data(Images and titles) from a web site as json api and put this data in a ListView bulider,
but I want to save the data on device first to view it when the device isn't connected to the internet and I want the data who I save it , be different order
You can use the Shared Preferences Package to store a Map
on the device.
I recommend reading Data Persistence with Flutter in the Cookbook. This will show you how to tackle this.
You could use SQFLite if you are familiar with SQL or Hive if you prefer to stick with pure dart
Related
so along with an exceptional app dev i have build a flashcard app that uses RTDB to store the progress of every card. i would like to transfer to firestore cloud, can anyone help me write a script for it?
There is no way to automatically convert an app that uses the Firebase Realtime Database to it using Cloud Firestore. While both are NoSQL databases, their data models are quite different - and there's no way to simply map the data or API calls from one to the other.
I am making a new application with Flutter. Products are listed on the web with api. But I wonder,
The user opened the application and all products from json appeared in the application. Then I want him to see the same products when he closes the internet. How can I do this, what do I have to investigate?
for offline viewing:
Using sqflite for storing image and text (json)
or
Using cached_network_image for image caching & sqflite for storing text (json)
I am developing an Android and iOS app that could be used in areas that have a very poor or no data connection. It is a requirement for the app to be pre-loaded with all of the data so it will work even if the app never communicated with the server, but it also needs to be able to update and sync when a connection is made. Is it possible to manually populate the AppSync (Apollo) cache database with data on launch and query and mutate it later? The app also contains several search and filter queries. Our backend API is currently using GraphQL.
I have seen this question, Is it possible to build offline-first mobile apps using AWS AppSync?, but it is a little different that what I'm asking.
The recommendation would be to hydrate (read: pre-load with data) a local SQLite database after install. SQLite is what the 'local cache' uses to persist data on the device.
Refer to this github issue for a code example of how to do this:
https://github.com/awslabs/aws-mobile-appsync-sdk-js/issues/160
I want to develop offline book reading app using flutter. There is any way in flutter so that user can access book offline.
you can put data in form of json and load data when you requires it
you can read more about it here
https://flutter.io/assets-and-images/
You can download the images/pdf files of your book in the device storage (External Storage) by asking user like
"Hey! Do you want this to be available offline? Cool, click the button and grant the storage permission in order to proceed".
After this, you can download the files from the server in device external storage and use it. Simple!
Basically what I want to do I be able to enter in data on a website, and have it appear on an iPhone app, so I want it to send the data to my iPhone, and store it so that every time i open the app, it will re load the data and put it on the screen. How can I go about this?
You will need a backend-side to your app. If you don't have any experience with backend-developing, I would recommend taking a look at Parse.com or other similar backend providers. They give you a server-solution without having to develop it yourself.
Good luck, and welcome to SO!