flutter_tts 0.0.1

A flutter plugin for Text to Speech

example/lib/main.dart

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

void main() => runApp(new MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => new _MyAppState();
}

enum TtsState { playing, stopped }

class _MyAppState extends State<MyApp> {
  FlutterTts flutterTts;
  List<dynamic> languages;

  String _newVoiceText;

  TtsState ttsState = TtsState.stopped;

  get isPlaying => ttsState == TtsState.playing;
  get isStopped => ttsState == TtsState.stopped;

  @override
  initState() {
    super.initState();
    initTts();
  }

  initTts() async {
    flutterTts = new FlutterTts();

    flutterTts.setStartHandler(() {
      setState(() {ttsState = TtsState.playing;});
    });

    flutterTts.setCompletionHandler(() {
      setState(() {ttsState = TtsState.stopped;});
    });

    flutterTts.setErrorHandler((msg) {
      setState(() {
        ttsState = TtsState.stopped;
      });
    });

    languages = await flutterTts.getLanguages;
    setState((){languages;});
  }

  Future _speak() async{
    var result = await flutterTts.speak(_newVoiceText);
    if (result == 1) setState(() => ttsState = TtsState.playing);
  }

  Future _stop() async{
    var result = await flutterTts.stop();
    if (result == 1) setState(() => ttsState = TtsState.stopped);
  }

  @override
  void dispose() {
    super.dispose();
    flutterTts.stop();
  }

  String language;

  List<DropdownMenuItem<String>> getDropDownMenuItems() {
    List<DropdownMenuItem<String>> items = new List();
    for (String type in languages) {
      items.add(new DropdownMenuItem(
        value: type,
        child: new Text(type)
      ));
    }
    return items;
  }

  void changedDropDownItem(String selectedType) {
    setState(() {
      language = selectedType;
      flutterTts.setLanguage(language);
    });
  }

  void _onChange(String text) {
    setState((){_newVoiceText = text;});
  }

  @override
  Widget build(BuildContext context) {

    return new MaterialApp(
      home: new Scaffold(
        appBar: new AppBar(
          title: new Text('Flutter TTS'),
        ),
        body: languages != null ? _buildRow() : null
      ),
    );
  }

  Widget _buildRow() => new Column(
    children:<Widget>[
      new Container(
        alignment: Alignment.topCenter,
        padding: new EdgeInsets.only(top: 25.0, left: 25.0, right: 25.0),
        child: new TextField (
          onChanged: (String value){_onChange(value);},
        )
      ),
      new Container(
        padding: new EdgeInsets.only(top: 200.0),
        child: new Row (
          mainAxisAlignment: MainAxisAlignment.spaceEvenly,
          children: <Widget>[
            new IconButton(
              icon: new Icon(Icons.play_arrow),
              onPressed: _newVoiceText == null || isPlaying ? null : () => _speak(),
              color: Colors.green,
              splashColor: Colors.greenAccent
            ),
            new IconButton(
              icon: new Icon(Icons.stop),
              onPressed: isStopped ? null : () => _stop(),
              color: Colors.red,
              splashColor: Colors.redAccent
            ),
            new DropdownButton(
              value: language,
              items: getDropDownMenuItems(),
              onChanged: changedDropDownItem,
            )
          ]
        )
      )
    ]
  );
}