How to save API data locally in Flutter so that app can work without internet connection?-CodePudding

I'm developing a small Flutter application using

CodePudding user response：

first of all you need to check : the first time ever you need to force user to have internet. all data they will be stored in local memory for the first time then if the user will not have internet then you can get data from local memory.

class NetoworkCheck extends ConsumerWidget {
  const NetoworkCheck({super.key});
  

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    SizeConfig().init(context);
    var network = ref.watch(networkCheckProvider);
    if (network == NetworkStatus.off) {
      return const NoNetworkScreen();
    }
    return const HomeScreen();
  }
}

you can check here and put your code here for storing data

if (network == NetworkStatus.off) {
store all data
          return const NoNetworkScreen();
        }

don't forget to use async/await mostly it will tike some time to store data

CodePudding user response：

To save API data locally in Flutter, you can use a local database such as SQLite or a simple file to store the data. Here are the steps you can follow to save API data locally in your Flutter app:

Parse the API response and extract the data that you want to save.

Open a connection to the local database (SQLite) or create a file to store the data.

Save the data in the local database or file.

When you want to retrieve the data, open a connection to the local database or read the file, and retrieve the data from it.

Use the retrieved data to populate your app.

You can use a library such as sqflite to manage the local SQLite database and perform CRUD (create, read, update, delete) operations on it.

You can also use a plugin like flutter_secure_storage to store data locally in the app's secure storage.

To check if the device has an internet connection, you can use the connectivity package. If there is no internet connection, you can retrieve the data from the local database or file and use it to populate your app. If there is an internet connection, you can make a network request to the API and update the local database or file with the latest data.