Switch between multiple versions of Node.Use React's useEffect to optimize your application's performance.Learn how LogRocket's Galileo cuts through the noise to proactively resolve issues in your app.Don't miss a moment with The Replay, a curated newsletter from LogRocket.As we have setter methods for the primitive types so we have getter methods for retrieving data. Now, let’s see how we can retrieve data from SharedPreferences. This adds a double value, 10.2, to the counter. This adds a string, "yes", to the counter. This adds an int, 1, to the counter table of SharedPreferences. (Note: The key of the key-value pair is in string.) Add int tInt('counter', 1) We can add the following primitive types:Įach primitive type has its corresponding setter method. It’s possible to add data of primitive types to SharedPreferences. In this section, we’ll demonstrate how to add data to and get, edit, and delete data from SharedPreferences. The prefs holds the instance of SharedPreferences. The getInstance creates and returns a SharedPreferences instance. SharedPreferences prefs = await SharedPreferences.getInstance() It has a method, getInstance, which is used to create an instance of a SharedPreferences. The shared_preferences plugin exports a SharedPreferences class, which has methods that can be used to set data of various primitive types in SharedPreferences. To use the shared_preferences plugin, we have to import it into our file: import 'package:shared_preferences/shared_preferences.dart' This will install the latest version of the dependency. Open the pubspec.yaml file and add shared_preferences in the dependencies section: dependencies: Now that we have the Flutter SDK ready and set, it’s time to install the shared_preferences plugin. You can open the project using VS Code or Android Studio. This command creates a folder, shared_pref, and places a Flutter project inside it. To scaffold a Flutter project, run the following command: flutter create shared_pref To use Android Studio to develop Flutter projects, you’ll need to install the following plugins: Head to the official website to download and install Android Studio on your machine. Android Studio is the official IDE/SDK used for building, testing, and publishing Android apps. We’ll be developing for the Android OS and we’ll need an emulator to test our apps on the run. Your version may be different from mine but you should be able to verify that the Flutter SDK was successfully installed. Run the below command to test this: ➜ flutter -version To install the Flutter SDK on our machine, you need to choose your Flutter binary as per your machine below:Īfter the installation, you will have the Flutter CLI available globally in your system. You’ll need to have some tools and binaries already installed on your machine, including the Flutter SDK and Android Studio. Let’s walk through how to scaffold a Flutter project, add the shared_preferences plugin to a Flutter project, and the methods exposed to us by the plugin. The plugin wraps NSUserDefaults on iOS and SharedPreferences on Android. To use SharedPreferences in Flutter, a plugin called shared_preferences enables us to store data. SharedPreferences stores the data in a key-value pair. The data stored in SharedPreferences can be edited and deleted. This data exists even when the app is shut down and starts up again we can still retrieve the value as it was. SharedPreferences is what Android and iOS apps use to store simple data in an allocated space.
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