如何在 flutter 中读取和写入公共 package 中的 FlutterSecureStorage

Question

Because many of my apps would use FlutterSecureStorage , so I define the FlutterSecureStorage in a public lib like this:

bool isLoggedIn = false;
String baseUrl = "";
String shareUrl = "";
String staticResourceUrl = "";
final pageStorageBucket = PageStorageBucket();
final storage = new FlutterSecureStorage();

enum ConfigType { DEV, PRO }

class GlobalConfig {}

I could expose the GlobalConfig in main.dart like this in public lib:

export 'src/config/global_config.dart';

but I just wanna to know how to use the storage after import the public lib in my app, I am using the public lib in my app like this:

  wheel:
    git:
      url: https://github.com/jiangxiaoqiang/wheel.git
      ref: main

how to read and write global FlutterSecureStorage when add dependencies of wheel lib? is it possible? or define the FlutterSecureStorage in each app is the best practice? or what should I do use the FlutterSecureStorage global?

Answer 1

I define a secure storage util class:

import 'package:flutter_secure_storage/flutter_secure_storage.dart';

class SecureStorageUtil{

  static FlutterSecureStorage _preferences = FlutterSecureStorage();

  static Future<String?> getString (String key, {String defValue = ''}) {
    return _preferences.read(key:key) ;
  }

  static Future<void> putString(String key, String value) {
    return _preferences.write(key:key, value:value);
  }

}

use it like this:

SecureStorageUtil.putString("token", "1");