encrypt_shared_preferences 0.4.5

Encrypted SharedPreferences for critical data.

example/lib/main.dart

import 'package:encrypt_shared_preferences/provider.dart';
import 'package:flutter/material.dart';

void main() async {
  await EncryptedSharedPreferences.initialize('1111111111111111',
      algorithm: EncryptionAlgorithm.salsa20);
  var sharedPref = EncryptedSharedPreferences.getInstance();

  await sharedPref.setString('user_token', 'xxxxxxxxxxxx');

  sharedPref.getString('user_token'); //xxxxxxxxxxxx

  await sharedPref.setInt('age', 99);

  sharedPref.getInt('age'); //99

  await sharedPref.setDouble('pi', 3.14);

  sharedPref.getDouble('pi'); //3.14

  await sharedPref.setBoolean('isPremium', true);

  sharedPref.getBoolean('isPremium'); //true

  await sharedPref.remove('user_token'); //true/false

  await sharedPref.clear(); //true/false

  sharedPref.listen(key: 'token').listen((event) {
    //event = key
    print(event);
  });

  sharedPref.listenSet(keys: {'key1', 'key2', 'keyN'}).listen((event) {
    //event = key
    print(event);
  });

  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: SharedBuilder(
          listenKeys: const {"key1", "key2"}, //Optional
          builder: (String updatedKey,
              EncryptedSharedPreferences encryptedSharedPreferences) {
            return Text("key $updatedKey   value : ${encryptedSharedPreferences.getString(updatedKey)}");
          },
        ),
        appBar: AppBar(
          title: const Text('Shared Builder Demo'),
        ),
        floatingActionButton: FloatingActionButton(
          onPressed: () async {
            EncryptedSharedPreferences.getInstance()
                .setString('key1', 'dataValue');
            Future.delayed(const Duration(seconds: 3), () {
              EncryptedSharedPreferences.getInstance()
                  .setString('key2', 'dataValue');
            });
          },
        ),
      ),
    );
  }
}