shared_preferences 0.5.4+6
shared_preferences: ^0.5.4+6 copied to clipboard
Flutter plugin for reading and writing simple key-value pairs. Wraps NSUserDefaults on iOS and SharedPreferences on Android.
Shared preferences plugin #
Wraps NSUserDefaults (on iOS) and SharedPreferences (on Android), providing a persistent store for simple data. Data is persisted to disk asynchronously. Neither platform can guarantee that writes will be persisted to disk after returning and this plugin must not be used for storing critical data.
Usage #
To use this plugin, add shared_preferences
as a dependency in your pubspec.yaml file.
Example #
import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';
void main() {
runApp(MaterialApp(
home: Scaffold(
body: Center(
child: RaisedButton(
onPressed: _incrementCounter,
child: Text('Increment Counter'),
),
),
),
));
}
_incrementCounter() async {
SharedPreferences prefs = await SharedPreferences.getInstance();
int counter = (prefs.getInt('counter') ?? 0) + 1;
print('Pressed $counter times.');
await prefs.setInt('counter', counter);
}
Testing #
You can populate SharedPreferences
with initial values in your tests by running this code:
SharedPrefernces.setMockInitialValues (Map<String, dynamic> values);