How to persist a List using shared preferences in flutter?

Posted by Andre Scott | Updated on April 15, 2020

Want to persist a List using shared preferences in flutter? First, you need to convert your list of integers to a List of Strings, then you save it in shared preferences. You do the opposite when loading.

This is a complete example:

import 'package:flutter/material.dart';

import 'package:shared_preferences/shared_preferences.dart';

void main() {

runApp(new MaterialApp(

home: new Scaffold(

body: new Center(

child: new RaisedButton(

onPressed: _save,

child: new Text('Save my list of int'),

));

}

_save() async {

List<int> myListOfIntegers = [1,2,3,4];

List<String> myListOfStrings= myListOfIntegers.map((i)=>i.toString()).toList();

SharedPreferences prefs = await SharedPreferences.getInstance();

List<String> myList = (prefs.getStringList('mylist') ?? List<String>()) ;

List<int> myOriginaList = myList.map((i)=> int.parse(i)).toList();

print('Your list $myOriginaList');

await prefs.setStringList('mylist', myListOfStrings);

}

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How to persist a List using shared preferences in flutter?

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