Flutter金融市场技术分析插件 tradingview_ta 的使用

简介

tradingview_ta 是一个非官方的TradingView API包装器，允许您获取技术分析数据。它现在由新的管理团队维护。

重要提示

• 保持 tradingview_ta 更新以获取新功能和错误修复：flutter pub add tradingview_ta

特性

• 支持多个符号
• 获取多符号与多个时间间隔的数据
• 指标（仅支持TradingView内置指标，不支持Pine Script/自定义指标）

安装

使用 Pub.dev (稳定版本，推荐)

flutter pub add tradingview_ta

使用 GitHub (最新版本)

git clone https://github.com/AbdAlftahSalem/dart-tradingview-ta.git

示例代码

以下是一个完整的示例，演示如何使用 tradingview_ta 插件来获取技术分析数据：

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

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(),
    );
  }
}

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

class _MyHomePageState extends State<MyHomePage> {
  List<Map<String, dynamic>> _analysisData = [];
  List<Map<String, dynamic>> _multiIntervalAnalysisData = [];
  List<Map<String, dynamic>> _supportAndResistantData = [];

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

  Future<void> _fetchData() async {
    // 初始化 TradingViewTA 实例
    TradingViewTA tradingViewTA = TradingViewTA(
      tradingView: TradingViewModel(
        screener: "crypto",
        symbols: ["BINANCE:BTCUSDT", "BINANCE:ETHUSDT"],
        interval: Intervals.INTERVAL_1_HOUR,
      ),
    );

    // 获取单个时间间隔的技术分析数据
    _analysisData = await tradingViewTA.getAnalysis();
    print("Single Interval Analysis: $_analysisData");

    // 获取多个时间间隔的技术分析数据
    _multiIntervalAnalysisData = await tradingViewTA.getAnalysisWithMultiFrame(
      intervals: [
        Intervals.INTERVAL_1_MONTH,
        Intervals.INTERVAL_1_HOUR,
      ],
    );
    print("Multi Interval Analysis: $_multiIntervalAnalysisData");

    // 获取支撑位和阻力位数据
    _supportAndResistantData = await tradingViewTA.getSupportAndResistant();
    print("Support and Resistant Data: $_supportAndResistantData");

    setState(() {});
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('TradingView TA Example'),
      ),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: [
            Text('Single Interval Analysis:', style: TextStyle(fontSize: 18)),
            SizedBox(height: 8),
            Expanded(
              child: ListView.builder(
                itemCount: _analysisData.length,
                itemBuilder: (context, index) {
                  var data = _analysisData[index];
                  return ListTile(title: Text(data.toString()));
                },
              ),
            ),
            SizedBox(height: 16),
            Text('Multi Interval Analysis:', style: TextStyle(fontSize: 18)),
            SizedBox(height: 8),
            Expanded(
              child: ListView.builder(
                itemCount: _multiIntervalAnalysisData.length,
                itemBuilder: (context, index) {
                  var data = _multiIntervalAnalysisData[index];
                  return ListTile(title: Text(data.toString()));
                },
              ),
            ),
            SizedBox(height: 16),
            Text('Support and Resistant Data:', style: TextStyle(fontSize: 18)),
            SizedBox(height: 8),
            Expanded(
              child: ListView.builder(
                itemCount: _supportAndResistantData.length,
                itemBuilder: (context, index) {
                  var data = _supportAndResistantData[index];
                  return ListTile(title: Text(data.toString()));
                },
              ),
            ),
          ],
        ),
      ),
    );
  }
}