preference_helper 0.0.5+2 preference_helper: ^0.0.5+2 copied to clipboard
A package that makes shared_preferences easier to use, This package is built with bloc, shared_preferences
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:preference_helper/preference_helper.dart';
import 'package:shared_preferences/shared_preferences.dart';
void main() async {
var sharedPreferences = await SharedPreferences.getInstance();
runApp(MyApp(
preferenceBloc: PreferenceBloc(
sharedPreferences: sharedPreferences,
usagePreferences: [
Preference<int>(
key: 'counter',
initValue: 0,
),
],
),
));
}
class MyApp extends StatelessWidget {
final PreferenceBloc preferenceBloc;
MyApp({@required this.preferenceBloc});
@override
Widget build(BuildContext context) {
return BlocProvider<PreferenceBloc>(
bloc: preferenceBloc,
child: MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
),
);
}
}
class MyHomePage extends StatefulWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
PreferenceBloc _preferenceBloc;
void _incrementCounter() {
var counterPref = _preferenceBloc.getPreference<int>('counter');
counterPref.value += 1;
_preferenceBloc.dispatch(UpdatePreference(counterPref));
}
@override
void initState() {
_preferenceBloc = BlocProvider.of<PreferenceBloc>(context);
super.initState();
}
@override
Widget build(BuildContext context) {
return BlocBuilder<PreferenceEvent, PreferenceState>(
bloc: _preferenceBloc,
builder: (BuildContext context, PreferenceState state) {
return Scaffold(
appBar: AppBar(
title: Text(widget.title),
),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'You have pushed the button this many times:',
),
Text(
(state is PreferenceState
? state.preferences.get<int>('counter').value
: 0)
.toString(),
style: Theme.of(context).textTheme.display1,
),
],
),
),
floatingActionButton: FloatingActionButton(
onPressed: _incrementCounter,
tooltip: 'Increment',
child: Icon(Icons.add),
),
);
},
);
}
}