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

import 'package:flutter/services.dart';
import 'package:flutter_tts/flutter_tts.dart';

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

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

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  String _platformVersion = 'Unknown';

  FlutterTts tts = FlutterTts();

  @override
  void initState() {
    super.initState();
    initPlatformState();
    tts.awaitSpeakCompletion(true);
    tts.startHandler=(){
       print('start');
    };
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    String platformVersion;
    // Platform messages may fail, so we use a try/catch PlatformException.
    // We also handle the message potentially returning null.
    try {
      platformVersion = 'Unknown platform version';
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Column(
          children: [
            Text('Running on: $_platformVersion\n'),
            ElevatedButton(
              onPressed: () async {
                try {
                 var rss= await tts.speak('Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界,Hello World 你好世界');
                 print('rss');
                } catch (e) {
                  print(e);
                }
              },
              child: Text('Say Hello'),
            )
          ],
        ),
      ),
    );
  }
}