leofinance_hive_api 是一个用于访问 Hive 区块链数据的 Flutter 插件，特别针对 LeoFinance 社区的应用场景。Hive 是一个基于区块链的去中心化社交媒体平台，而 LeoFinance 是 Hive 上的一个专注于金融和投资的社区。

安装 leofinance_hive_api

首先，你需要在 pubspec.yaml 文件中添加 leofinance_hive_api 依赖：

dependencies:
  flutter:
    sdk: flutter
  leofinance_hive_api: ^1.0.0  # 请使用最新版本

然后运行 flutter pub get 来安装依赖。

使用 leofinance_hive_api

以下是一些常见的用法示例：

1. 初始化插件

在使用插件之前，通常需要初始化它。你可以在 main.dart 中进行初始化：

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

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await LeoFinanceHiveApi.initialize();
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'LeoFinance Hive API Demo',
      home: HomePage(),
    );
  }
}

2. 获取账户信息

你可以使用 getAccount 方法来获取 Hive 账户的信息：

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

class HomePage extends StatefulWidget {
  [@override](/user/override)
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  Map<String, dynamic> accountInfo = {};

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

  Future<void> fetchAccountInfo() async {
    try {
      final info = await LeoFinanceHiveApi.getAccount('your_hive_username');
      setState(() {
        accountInfo = info;
      });
    } catch (e) {
      print('Error fetching account info: $e');
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Hive Account Info'),
      ),
      body: Center(
        child: accountInfo.isEmpty
            ? CircularProgressIndicator()
            : Column(
                children: [
                  Text('Name: ${accountInfo['name']}'),
                  Text('Balance: ${accountInfo['balance']}'),
                  Text('Vesting Shares: ${accountInfo['vesting_shares']}'),
                ],
              ),
      ),
    );
  }
}

3. 获取社区帖子

你可以使用 getCommunityPosts 方法来获取 LeoFinance 社区的帖子：

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

class CommunityPostsPage extends StatefulWidget {
  [@override](/user/override)
  _CommunityPostsPageState createState() => _CommunityPostsPageState();
}

class _CommunityPostsPageState extends State<CommunityPostsPage> {
  List<dynamic> posts = [];

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

  Future<void> fetchCommunityPosts() async {
    try {
      final postsList = await LeoFinanceHiveApi.getCommunityPosts('leofinance');
      setState(() {
        posts = postsList;
      });
    } catch (e) {
      print('Error fetching community posts: $e');
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('LeoFinance Community Posts'),
      ),
      body: ListView.builder(
        itemCount: posts.length,
        itemBuilder: (context, index) {
          final post = posts[index];
          return ListTile(
            title: Text(post['title']),
            subtitle: Text(post['author']),
          );
        },
      ),
    );
  }
}

4. 发送交易

你还可以使用插件发送交易（例如转账）：

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

class SendTransactionPage extends StatefulWidget {
  [@override](/user/override)
  _SendTransactionPageState createState() => _SendTransactionPageState();
}

class _SendTransactionPageState extends State<SendTransactionPage> {
  final _formKey = GlobalKey<FormState>();
  final _toController = TextEditingController();
  final _amountController = TextEditingController();
  final _memoController = TextEditingController();

  Future<void> sendTransaction() async {
    if (_formKey.currentState!.validate()) {
      try {
        await LeoFinanceHiveApi.sendTransaction(
          from: 'your_hive_username',
          to: _toController.text,
          amount: _amountController.text,
          memo: _memoController.text,
          privateKey: 'your_private_key',
        );
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Transaction sent successfully!')),
        );
      } catch (e) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text('Error sending transaction: $e')),
        );
      }
    }
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Send Transaction'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Form(
          key: _formKey,
          child: Column(
            children: [
              TextFormField(
                controller: _toController,
                decoration: InputDecoration(labelText: 'To'),
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Please enter a recipient';
                  }
                  return null;
                },
              ),
              TextFormField(
                controller: _amountController,
                decoration: InputDecoration(labelText: 'Amount'),
                validator: (value) {
                  if (value == null || value.isEmpty) {
                    return 'Please enter an amount';
                  }
                  return null;
                },
              ),
              TextFormField(
                controller: _memoController,
                decoration: InputDecoration(labelText: 'Memo'),
              ),
              SizedBox(height: 20),
              ElevatedButton(
                onPressed: sendTransaction,
                child: Text('Send'),
              ),
            ],
          ),
        ),
      ),
    );
  }
}