asr_lib 0.1.0

On-device speech recognition for Flutter powered by sherpa-onnx.

example/lib/main.dart

import 'package:flutter/material.dart';
import 'package:sherpa_asr/asr_lib.dart';

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

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'sherpa-asr Demo',
      theme: ThemeData(
        colorSchemeSeed: Colors.blue,
        useMaterial3: true,
      ),
      home: const AsrDemoPage(),
    );
  }
}

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

  @override
  State<AsrDemoPage> createState() => _AsrDemoPageState();
}

class _AsrDemoPageState extends State<AsrDemoPage> {
  final AsrLib _asr = AsrLib();
  AsrState _state = AsrState.idle;
  String _result = '';
  bool _initialized = false;

  @override
  void initState() {
    super.initState();
    _asr.stateStream.listen((state) {
      setState(() => _state = state);
    });
    _asr.resultStream.listen((result) {
      setState(() => _result = '${result.text}\n$_result');
    });
  }

  Future<void> _initialize() async {
    final ok = await _asr.initialize();
    setState(() => _initialized = ok);
  }

  @override
  void dispose() {
    _asr.release();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: const Text('sherpa-asr')),
      body: Column(
        children: [
          Expanded(
            child: SingleChildScrollView(
              padding: const EdgeInsets.all(16),
              reverse: true,
              child: Text(_result.isEmpty ? 'No results yet' : _result),
            ),
          ),
          Text('State: ${_state.name}'),
          const SizedBox(height: 8),
          Row(
            mainAxisAlignment: MainAxisAlignment.center,
            children: [
              if (!_initialized)
                FilledButton(onPressed: _initialize, child: const Text('Initialize'))
              else ...[
                FilledButton(
                  onPressed: _state == AsrState.ready ? () => _asr.startRecording() : null,
                  child: const Text('Start'),
                ),
                const SizedBox(width: 8),
                FilledButton(
                  onPressed: _state == AsrState.recording ? () => _asr.stopRecording() : null,
                  child: const Text('Stop'),
                ),
              ],
            ],
          ),
          const SizedBox(height: 16),
        ],
      ),
    );
  }
}