shared_preferences
Flutter plugin for reading and writing simple key-value pairs. Wraps NSUserDefaults on iOS and SharedPreferences on Android.
dependencies:
shared_preferences: ^0.5.3+4
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);
}
url_launcher
Flutter plugin for launching a URL on Android and iOS. Supports web, phone, SMS, and email schemes.
dependencies:
url_launcher: ^5.1.2
import 'package:flutter/material.dart';
import 'package:url_launcher/url_launcher.dart';
void main() {
runApp(Scaffold(
body: Center(
child: RaisedButton(
onPressed: _launchURL,
child: Text('Show Flutter homepage'),
),
),
));
}
_launchURL() async {
const url = 'https://flutter.dev';
if (await canLaunch(url)) {
await launch(url);
} else {
throw 'Could not launch $url';
}
}
path_provider
Flutter plugin for getting commonly used locations on the Android & iOS file systems, such as the temp and app data directories.
dependencies:
path_provider: ^1.3.0
Directory tempDir = await getTemporaryDirectory();
String tempPath = tempDir.path;
Directory appDocDir = await getApplicationDocumentsDirectory();
String appDocPath = appDocDir.path;