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shared preference flutter

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saleem mahdi answered on July 21, 2021 Popularity 10/10 Helpfulness 3/10

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shared preference flutter

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//write this in terminal to add the package
flutter pub add shared_preferences 

import 'package:shared_preferences/shared_preferences.dart';

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Contributed on Jul 13 2022

saleem mahdi

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shared_preferences: ^2.0.12

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Tags: flutter

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Contributed on Feb 02 2022

Alert Armadillo

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shared preference flutter

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add this line to terminal to get the newest version

flutter pub add shared_preferences

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Contributed on Oct 11 2021

Old-fashioned Okapi

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shared preferences flutter

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import 'package:flutter/material.dart';
import 'package:shared_preferences/shared_preferences.dart';

class MyHomePage extends StatefulWidget {
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  TextEditingController _textEditingController = TextEditingController();

  void _saveToPreferences() async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    prefs.setString('myKey', _textEditingController.text);
  }

  void _loadFromPreferences() async {
    SharedPreferences prefs = await SharedPreferences.getInstance();
    String? myText = prefs.getString('myKey');
    setState(() {
      _textEditingController.text = myText ?? '';
    });
  }

  @override
  void initState() {
    super.initState();
    _loadFromPreferences();
  }

  @override
  void dispose() {
    _textEditingController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Shared Preferences Example'),
      ),
      body: Center(
        child: Padding(
          padding: const EdgeInsets.all(20.0),
          child: TextFormField(
            controller: _textEditingController,
            onChanged: (value) => _saveToPreferences(),
            decoration: InputDecoration(
              labelText: 'Enter some text',
            ),
          ),
        ),
      ),
    );
  }
}

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Contributed on Sep 12 2023

YOU.com

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shared preferences flutter

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// Obtain shared preferences.
final prefs = await SharedPreferences.getInstance();

// Save an integer value to 'counter' key.
await prefs.setInt('counter', 10);
// Save an boolean value to 'repeat' key.
await prefs.setBool('repeat', true);
// Save an double value to 'decimal' key.
await prefs.setDouble('decimal', 1.5);
// Save an String value to 'action' key.
await prefs.setString('action', 'Start');
// Save an list of strings to 'items' key.
await prefs.setStringList('items', <String>['Earth', 'Moon', 'Sun']);

//READ DATA
// Try reading data from the 'counter' key. If it doesn't exist, returns null.
final int? counter = prefs.getInt('counter');
// Try reading data from the 'repeat' key. If it doesn't exist, returns null.
final bool? repeat = prefs.getBool('repeat');
// Try reading data from the 'decimal' key. If it doesn't exist, returns null.
final double? decimal = prefs.getDouble('decimal');
// Try reading data from the 'action' key. If it doesn't exist, returns null.
final String? action = prefs.getString('action');
// Try reading data from the 'items' key. If it doesn't exist, returns null.
final List<String>? items = prefs.getStringList('items');

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Contributed on Jul 08 2022

Cautious Crocodile

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shared preferences flutter

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shared_preferences: ^2.0.6

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Contributed on Jul 21 2021

Proud Porcupine

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