Flutter安全存储插件flutter_secure_storage_tizen的使用

Flutter安全存储插件flutter_secure_storage_tizen的使用

该插件是 flutter_secure_storage 在Tizen平台上的实现。

开始使用

此插件不是 flutter_secure_storage 的官方推荐实现。因此，在你的 pubspec.yaml 文件中，你需要同时包含 flutter_secure_storage 和 flutter_secure_storage_tizen 作为依赖项：

dependencies:
  flutter_secure_storage: ^9.0.0
  flutter_secure_storage_tizen: ^0.1.1

然后你可以在Dart代码中导入 flutter_secure_storage：

import 'package:flutter_secure_storage/flutter_secure_storage.dart';

对于详细的用法，请参考 flutter_secure_storage文档。

完整示例代码

以下是一个完整的示例代码，展示了如何在Tizen平台上使用 flutter_secure_storage_tizen 插件。

import 'dart:async';
import 'dart:io';
import 'dart:math';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_secure_storage/flutter_secure_storage.dart';

void main() {
  runApp(const MaterialApp(home: ItemsWidget()));
}

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

  [@override](/user/override)
  ItemsWidgetState createState() => ItemsWidgetState();
}

// 枚举定义了所有可能的操作
enum _Actions { deleteAll }

// 枚举定义了对每个项目的操作
enum _ItemActions { delete, edit, containsKey, read }

class ItemsWidgetState extends State<ItemsWidget> {
  final _storage = const FlutterSecureStorage();
  final _accountNameController =
      TextEditingController(text: 'flutter_secure_storage_service');

  List<_SecItem> _items = [];

  [@override](/user/override)
  void initState() {
    super.initState();

    _accountNameController.addListener(() => _readAll());
    _readAll();
  }

  // 读取所有数据
  Future<void> _readAll() async {
    final all = await _storage.readAll(
      iOptions: _getIOSOptions(),
      aOptions: _getAndroidOptions(),
    );
    setState(() {
      _items = all.entries
          .map((entry) => _SecItem(entry.key, entry.value))
          .toList(growable: false);
    });
  }

  // 删除所有数据
  Future<void> _deleteAll() async {
    await _storage.deleteAll(
      iOptions: _getIOSOptions(),
      aOptions: _getAndroidOptions(),
    );
    _readAll();
  }

  // 添加新的项目
  Future<void> _addNewItem() async {
    final String key = _randomValue();
    final String value = _randomValue();

    await _storage.write(
      key: key,
      value: value,
      iOptions: _getIOSOptions(),
      aOptions: _getAndroidOptions(),
    );
    _readAll();
  }

  // 获取iOS选项
  IOSOptions _getIOSOptions() => IOSOptions(
        accountName: _getAccountName(),
      );

  // 获取Android选项
  AndroidOptions _getAndroidOptions() => const AndroidOptions(
        encryptedSharedPreferences: true,
      );

  // 获取账户名称
  String? _getAccountName() =>
      _accountNameController.text.isEmpty ? null : _accountNameController.text;

  [@override](/user/override)
  Widget build(BuildContext context) => Scaffold(
        appBar: AppBar(
          title: const Text('插件示例应用'),
          actions: [
            IconButton(
              key: const Key('add_random'),
              onPressed: _addNewItem,
              icon: const Icon(Icons.add),
            ),
            PopupMenuButton<_Actions>(
              key: const Key('popup_menu'),
              onSelected: (action) {
                switch (action) {
                  case _Actions.deleteAll:
                    _deleteAll();
                    break;
                }
              },
              itemBuilder: (BuildContext context) =>
                  [
                    const PopupMenuItem(
                      key: Key('delete_all'),
                      value: _Actions.deleteAll,
                      child: Text('删除所有'),
                    ),
                  ],
            ),
          ],
        ),
        body: Column(
          children: [
            if (!kIsWeb && Platform.isIOS)
              Padding(
                padding: const EdgeInsets.symmetric(horizontal: 16),
                child: TextFormField(
                  controller: _accountNameController,
                  decoration:
                      const InputDecoration(labelText: 'kSecAttrService'),
                ),
              ),
            Expanded(
              child: ListView.builder(
                itemCount: _items.length,
                itemBuilder: (BuildContext context, int index) => ListTile(
                  trailing: PopupMenuButton(
                    key: Key('popup_row_$index'),
                    onSelected: (_ItemActions action) =>
                        _performAction(action, _items[index], context),
                    itemBuilder: (BuildContext context) =>
                        [
                      PopupMenuItem(
                        value: _ItemActions.delete,
                        child: Text(
                          '删除',
                          key: Key('delete_row_$index'),
                        ),
                      ),
                      PopupMenuItem(
                        value: _ItemActions.edit,
                        child: Text(
                          '编辑',
                          key: Key('edit_row_$index'),
                        ),
                      ),
                      PopupMenuItem(
                        value: _ItemActions.containsKey,
                        child: Text(
                          '检查键是否存在',
                          key: Key('contains_row_$index'),
                        ),
                      ),
                      PopupMenuItem(
                        value: _ItemActions.read,
                        child: Text(
                          '读取',
                          key: Key('contains_row_$index'),
                        ),
                      ),
                    ],
                  ),
                  title: Text(
                    _items[index].value,
                    key: Key('title_row_$index'),
                  ),
                  subtitle: Text(
                    _items[index].key,
                    key: Key('subtitle_row_$index'),
                  ),
                ),
              ),
            ),
          ],
        ),
      );

  // 执行操作
  Future<void> _performAction(
    _ItemActions action,
    _SecItem item,
    BuildContext context,
  ) async {
    switch (action) {
      case _ItemActions.delete:
        await _storage.delete(
          key: item.key,
          iOptions: _getIOSOptions(),
          aOptions: _getAndroidOptions(),
        );
        _readAll();

        break;
      case _ItemActions.edit:
        if (!context.mounted) return;
        final result = await showDialog<String>(
          context: context,
          builder: (context) => _EditItemWidget(item.value),
        );
        if (result != null) {
          await _storage.write(
            key: item.key,
            value: result,
            iOptions: _getIOSOptions(),
            aOptions: _getAndroidOptions(),
          );
          _readAll();
        }
        break;
      case _ItemActions.containsKey:
        if (!context.mounted) return;
        final key = await _displayTextInputDialog(context, item.key);
        final result = await _storage.containsKey(key: key);
        if (!mounted) return;
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text('包含键: $result, 检查的键: $key'),
            backgroundColor: result ? Colors.green : Colors.red,
          ),
        );
        break;
      case _ItemActions.read:
        if (!context.mounted) return;
        final key = await _displayTextInputDialog(context, item.key);
        final result =
            await _storage.read(key: key, aOptions: _getAndroidOptions());
        if (!mounted) return;
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(
            content: Text('值: $result'),
          ),
        );
        break;
    }
  }

  // 显示文本输入对话框
  Future<String> _displayTextInputDialog(
    BuildContext context,
    String key,
  ) async {
    final controller = TextEditingController();
    controller.text = key;
    await showDialog(
      context: context,
      builder: (context) {
        return AlertDialog(
          title: const Text('检查键是否存在'),
          actions: [
            TextButton(
              onPressed: () => Navigator.of(context).pop(),
              child: const Text('确定'),
            ),
          ],
          content: TextField(
            controller: controller,
          ),
        );
      },
    );
    return controller.text;
  }

  // 生成随机值
  String _randomValue() {
    final rand = Random();
    final codeUnits = List.generate(20, (index) {
      return rand.nextInt(26) + 65;
    });

    return String.fromCharCodes(codeUnits);
  }
}

// 编辑项目的小部件
class _EditItemWidget extends StatelessWidget {
  _EditItemWidget(String text)
      : _controller = TextEditingController(text: text);

  final TextEditingController _controller;

  [@override](/user/override)
  Widget build(BuildContext context) {
    return AlertDialog(
      title: const Text('编辑项目'),
      content: TextField(
        key: const Key('title_field'),
        controller: _controller,
        autofocus: true,
      ),
      actions: [
        TextButton(
          key: const Key('cancel'),
          onPressed: () => Navigator.of(context).pop(),
          child: const Text('取消'),
        ),
        TextButton(
          key: const Key('save'),
          onPressed: () => Navigator.of(context).pop(_controller.text),
          child: const Text('保存'),
        ),
      ],
    );
  }
}

// 项目类
class _SecItem {
  _SecItem(this.key, this.value);

  final String key;
  final String value;
}