475 lines
18 KiB
Dart
475 lines
18 KiB
Dart
import 'package:flutter/material.dart';
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import 'dart:io';
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import '../../../core/network/ai_api_service.dart';
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/// AI口语评估页面
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class AISpeakingPage extends StatefulWidget {
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const AISpeakingPage({Key? key}) : super(key: key);
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@override
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State<AISpeakingPage> createState() => _AISpeakingPageState();
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}
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class _AISpeakingPageState extends State<AISpeakingPage> {
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final AIApiService _aiApiService = AIApiService();
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bool _isRecording = false;
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bool _isLoading = false;
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File? _audioFile;
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Map<String, dynamic>? _evaluationResult;
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String? _error;
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String _selectedTask = 'pronunciation';
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final List<Map<String, String>> _taskTypes = [
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{'value': 'pronunciation', 'label': '发音评估'},
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{'value': 'fluency', 'label': '流利度评估'},
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{'value': 'conversation', 'label': '对话评估'},
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{'value': 'presentation', 'label': '演讲评估'},
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];
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Future<void> _startRecording() async {
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// 这里应该集成录音功能
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// 暂时模拟录音状态
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setState(() {
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_isRecording = true;
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_error = null;
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});
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// 模拟录音过程
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await Future.delayed(const Duration(seconds: 2));
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setState(() {
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_isRecording = false;
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// 模拟生成音频文件
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_audioFile = File('/tmp/mock_audio.wav');
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});
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('录音完成，可以开始评估')),
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);
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}
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Future<void> _stopRecording() async {
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setState(() {
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_isRecording = false;
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});
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}
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Future<void> _submitForEvaluation() async {
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if (_audioFile == null) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('请先录制音频')),
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);
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return;
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}
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setState(() {
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_isLoading = true;
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_error = null;
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_evaluationResult = null;
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});
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try {
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final result = await _aiApiService.evaluateSpeaking(
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audioText: '模拟音频转文本结果', // 实际应该是音频转文本的结果
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prompt: '请评估这段英语口语的$_selectedTask',
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);
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setState(() {
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_evaluationResult = result;
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_isLoading = false;
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});
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} catch (e) {
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setState(() {
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_error = e.toString();
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_isLoading = false;
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});
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}
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}
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void _clearRecording() {
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setState(() {
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_audioFile = null;
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_evaluationResult = null;
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_error = null;
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});
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}
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(
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title: const Text('AI口语评估'),
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backgroundColor: Theme.of(context).primaryColor,
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foregroundColor: Colors.white,
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actions: [
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IconButton(
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icon: const Icon(Icons.clear),
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onPressed: _clearRecording,
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tooltip: '清空录音',
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),
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],
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),
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body: SingleChildScrollView(
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padding: const EdgeInsets.all(16.0),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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// 任务类型选择
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Card(
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child: Padding(
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padding: const EdgeInsets.all(16.0),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text(
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'评估类型',
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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),
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),
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const SizedBox(height: 12),
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Wrap(
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spacing: 8,
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children: _taskTypes.map((type) {
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final isSelected = _selectedTask == type['value'];
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return ChoiceChip(
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label: Text(type['label']!),
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selected: isSelected,
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onSelected: (selected) {
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if (selected) {
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setState(() {
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_selectedTask = type['value']!;
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});
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}
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},
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);
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}).toList(),
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),
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],
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),
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),
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),
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const SizedBox(height: 16),
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// 录音控制区域
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Card(
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child: Padding(
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padding: const EdgeInsets.all(16.0),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text(
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'录音控制',
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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),
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),
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const SizedBox(height: 16),
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// 录音按钮
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Center(
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child: Column(
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children: [
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GestureDetector(
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onTap: _isRecording ? _stopRecording : _startRecording,
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child: Container(
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width: 120,
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height: 120,
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decoration: BoxDecoration(
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shape: BoxShape.circle,
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color: _isRecording
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? Colors.red.shade400
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: Theme.of(context).primaryColor,
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boxShadow: [
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BoxShadow(
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color: (_isRecording
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? Colors.red.shade400
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: Theme.of(context).primaryColor)
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.withOpacity(0.3),
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spreadRadius: _isRecording ? 10 : 5,
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blurRadius: 20,
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),
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],
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),
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child: Icon(
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_isRecording ? Icons.stop : Icons.mic,
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size: 50,
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color: Colors.white,
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),
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),
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),
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const SizedBox(height: 16),
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Text(
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_isRecording ? '点击停止录音' : '点击开始录音',
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style: const TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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),
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),
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if (_audioFile != null)
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Container(
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margin: const EdgeInsets.only(top: 12),
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padding: const EdgeInsets.symmetric(
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horizontal: 16,
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vertical: 8,
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),
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decoration: BoxDecoration(
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color: Colors.green.shade50,
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borderRadius: BorderRadius.circular(20),
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border: Border.all(
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color: Colors.green.shade200,
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),
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),
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child: Row(
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mainAxisSize: MainAxisSize.min,
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children: [
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Icon(
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Icons.check_circle,
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color: Colors.green.shade600,
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size: 16,
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),
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const SizedBox(width: 4),
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const Text(
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'录音完成',
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style: TextStyle(fontSize: 12),
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),
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],
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),
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),
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],
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),
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),
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const SizedBox(height: 16),
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// 评估按钮
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SizedBox(
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width: double.infinity,
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child: ElevatedButton(
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onPressed: (_audioFile != null && !_isLoading)
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? _submitForEvaluation
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: null,
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style: ElevatedButton.styleFrom(
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backgroundColor: Theme.of(context).primaryColor,
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foregroundColor: Colors.white,
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padding: const EdgeInsets.symmetric(vertical: 16),
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),
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child: _isLoading
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? const Row(
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mainAxisAlignment: MainAxisAlignment.center,
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children: [
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SizedBox(
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width: 20,
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height: 20,
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child: CircularProgressIndicator(
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strokeWidth: 2,
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valueColor: AlwaysStoppedAnimation<Color>(Colors.white),
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),
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),
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SizedBox(width: 8),
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Text('AI评估中...'),
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],
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)
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: const Text(
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'开始AI评估',
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style: TextStyle(fontSize: 16),
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),
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),
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),
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],
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),
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),
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),
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const SizedBox(height: 16),
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// 错误显示
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if (_error != null)
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Card(
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color: Colors.red.shade50,
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child: Padding(
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padding: const EdgeInsets.all(16.0),
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child: Row(
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children: [
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Icon(Icons.error, color: Colors.red.shade700),
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const SizedBox(width: 8),
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Expanded(
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child: Text(
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_error!,
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style: TextStyle(color: Colors.red.shade700),
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),
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),
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],
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),
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),
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),
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// 评估结果显示
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if (_evaluationResult != null)
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Card(
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child: Padding(
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padding: const EdgeInsets.all(16.0),
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child: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Row(
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children: [
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Icon(
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Icons.assessment,
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color: Colors.blue.shade600,
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),
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const SizedBox(width: 8),
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const Text(
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'AI评估结果',
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style: TextStyle(
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fontSize: 18,
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fontWeight: FontWeight.bold,
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),
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),
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],
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),
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const SizedBox(height: 16),
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// 总体评分
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if (_evaluationResult!['overall_score'] != null)
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Container(
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padding: const EdgeInsets.all(12),
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decoration: BoxDecoration(
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color: Colors.blue.shade50,
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borderRadius: BorderRadius.circular(8),
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),
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child: Row(
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children: [
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const Icon(Icons.star, color: Colors.amber),
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const SizedBox(width: 8),
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Text(
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'总体评分: ${_evaluationResult!['overall_score']}/100',
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style: const TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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),
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),
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],
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),
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),
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const SizedBox(height: 12),
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// 各项评分
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if (_evaluationResult!['scores'] != null)
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Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const Text(
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'详细评分:',
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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),
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),
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const SizedBox(height: 8),
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...(_evaluationResult!['scores'] as Map<String, dynamic>)
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.entries
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.map(
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(entry) => Padding(
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padding: const EdgeInsets.symmetric(vertical: 4),
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child: Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Text(
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_getScoreLabel(entry.key),
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style: const TextStyle(fontSize: 14),
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),
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Container(
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padding: const EdgeInsets.symmetric(
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horizontal: 8,
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vertical: 2,
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),
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decoration: BoxDecoration(
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color: _getScoreColor(entry.value),
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borderRadius: BorderRadius.circular(12),
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),
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child: Text(
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'${entry.value}/100',
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style: const TextStyle(
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color: Colors.white,
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fontSize: 12,
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fontWeight: FontWeight.bold,
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),
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),
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),
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],
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),
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),
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),
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],
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),
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// 改进建议
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if (_evaluationResult!['suggestions'] != null)
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Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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const SizedBox(height: 16),
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const Text(
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'改进建议:',
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style: TextStyle(
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fontSize: 16,
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fontWeight: FontWeight.bold,
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),
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),
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const SizedBox(height: 8),
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Container(
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padding: const EdgeInsets.all(12),
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decoration: BoxDecoration(
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color: Colors.green.shade50,
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borderRadius: BorderRadius.circular(8),
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border: Border.all(
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color: Colors.green.shade200,
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),
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),
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child: Text(
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_evaluationResult!['suggestions'].toString(),
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style: const TextStyle(fontSize: 14),
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),
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),
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],
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),
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],
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),
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),
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),
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],
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),
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),
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);
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}
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String _getScoreLabel(String key) {
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switch (key) {
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case 'pronunciation':
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return '发音准确度';
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case 'fluency':
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return '流利度';
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case 'grammar':
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return '语法正确性';
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case 'vocabulary':
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return '词汇丰富度';
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case 'coherence':
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return '连贯性';
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default:
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return key;
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}
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}
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Color _getScoreColor(dynamic score) {
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final scoreValue = score is int ? score : int.tryParse(score.toString()) ?? 0;
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if (scoreValue >= 80) {
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return Colors.green;
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} else if (scoreValue >= 60) {
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return Colors.orange;
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} else {
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return Colors.red;
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}
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}
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} |