ChangeLog #

0.9.1 #

• Android: Fixing method call error

0.9.0 #

• Android: Adding synthesize to file

0.8.7 #

• Android: Fix sporadic ANR on initialization

0.8.6 #

• iOS: Reducing volume of other sessions while TTS is playing

0.8.5 #

• Android: Fix Android async platform initialization
• Android: Removing initHandler

0.8.2 #

• Web: Adding isLanguageAvailable method
• All: Fixing isLanguageAvailable platform channel and making it case insensitive

0.8.0 #

• Web: Adding Web Support

0.7.0 #

• iOS: Adding Swift version 4.2 to podspec and correct audio playback category

0.6.0 #

• Android: AndroidX support

0.5.2 #

• Android: Bug Fix on isLanguageAvailable

0.5.1 #

• Applying flutter format to fix health suggestion

0.5.0 #

• Android: Adding silence before speak
• Android: Removing deprecated API

0.2.6 #

• IOS: Add voice selection implementation

0.2.5 #

• Android: Ensure invokeMethod runs on main thread

0.2.4 #

• Android: setting minSDK back to 21 and adding instructions to readme
• Android: Adding fallback for getLanguages and defaultLanguage

0.2.3 #

• IOS: Audio continues with the Ring/Silent switch set to silent

0.2.2 #

• Android: Fixing Locale bug

0.2.1 #

• IOS: Fixing getLanguages bug

0.2.0 #

• Android: Adding exception catch for samsung devices
• Android: Using default com.google.android.tts engine
• Android: Get and Set Voice
• Android: InitHandler
• Cleaning up the example

0.1.2 #

• Support for Android background execution
• Updating Android build gradle version to 3.2.1

0.1.1 #

• Fixing TTS bound error in the example
• Fixing default voice language not found error on Android

0.1.0 #

• Updating version for improved maintenance score
• Updating package description for improved maintenance score

0.0.8 #

• Adding analysis_options.yaml for improved health score
• Fixing info/errors from flutter analyze

0.0.7 #

• Updating SDK version in pubspec.yaml
• Adding package link to README
• Fixing language string warning received from xcode

0.0.6 #

• Android: Upgrading Gradle 4.1 to 4.4
• Android: Setting minSdk version to 21
• Android: Adding try/catch to getAvailableLanguages & getDefaultVoice methods (Issues with API 21 & 22)

0.0.5 #

• Adding IOS/Android isLanguageAvailable
• Rename setRate to setSpeechRate

0.0.4 #

• Simplify podspec for Cocoapods 1.5.0

0.0.3 #

• Adding IOS/Android speech pitch and volume

0.0.2 #

• Flutter formatting and fixing pubspec sdk versioning

0.0.1 #

• first POC :
  • methods : speak, stop, setRate, setLangauge, getLanguages
  • a globalHandler for completion

example/lib/main.dart

import 'dart:async';

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

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

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

enum TtsState { playing, stopped }

class _MyAppState extends State<MyApp> {
  FlutterTts flutterTts;
  dynamic languages;
  String language;
  double volume = 0.5;
  double pitch = 1.0;
  double rate = 0.5;

  String _newVoiceText;

  TtsState ttsState = TtsState.stopped;

  get isPlaying => ttsState == TtsState.playing;

  get isStopped => ttsState == TtsState.stopped;

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

  initTts() {
    flutterTts = FlutterTts();

    _getLanguages();

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

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

    flutterTts.setErrorHandler((msg) {
      setState(() {
        print("error: $msg");
        ttsState = TtsState.stopped;
      });
    });
  }

  Future _getLanguages() async {
    languages = await flutterTts.getLanguages;
    if (languages != null) setState(() => languages);
  }

  Future _speak() async {
    await flutterTts.setVolume(volume);
    await flutterTts.setSpeechRate(rate);
    await flutterTts.setPitch(pitch);

    if (_newVoiceText != null) {
      if (_newVoiceText.isNotEmpty) {
        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();
  }

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

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

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

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        home: Scaffold(
            appBar: AppBar(
              title: Text('Flutter TTS'),
            ),
            body: SingleChildScrollView(
                scrollDirection: Axis.vertical,
                child: Column(children: [
                  _inputSection(),
                  _btnSection(),
                  languages != null ? _languageDropDownSection() : Text(""),
                  _buildSliders()
                ]))));
  }

  Widget _inputSection() => Container(
      alignment: Alignment.topCenter,
      padding: EdgeInsets.only(top: 25.0, left: 25.0, right: 25.0),
      child: TextField(
        onChanged: (String value) {
          _onChange(value);
        },
      ));

  Widget _btnSection() => Container(
      padding: EdgeInsets.only(top: 50.0),
      child: Row(mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: [
        _buildButtonColumn(
            Colors.green, Colors.greenAccent, Icons.play_arrow, 'PLAY', _speak),
        _buildButtonColumn(
            Colors.red, Colors.redAccent, Icons.stop, 'STOP', _stop)
      ]));

  Widget _languageDropDownSection() => Container(
      padding: EdgeInsets.only(top: 50.0),
      child: Row(mainAxisAlignment: MainAxisAlignment.center, children: [
        DropdownButton(
          value: language,
          items: getLanguageDropDownMenuItems(),
          onChanged: changedLanguageDropDownItem,
        )
      ]));

  Column _buildButtonColumn(Color color, Color splashColor, IconData icon,
      String label, Function func) {
    return Column(
        mainAxisSize: MainAxisSize.min,
        mainAxisAlignment: MainAxisAlignment.center,
        children: [
          IconButton(
              icon: Icon(icon),
              color: color,
              splashColor: splashColor,
              onPressed: () => func()),
          Container(
              margin: const EdgeInsets.only(top: 8.0),
              child: Text(label,
                  style: TextStyle(
                      fontSize: 12.0,
                      fontWeight: FontWeight.w400,
                      color: color)))
        ]);
  }

  Widget _buildSliders() {
    return Column(
      children: [_volume(), _pitch(), _rate()],
    );
  }

  Widget _volume() {
    return Slider(
        value: volume,
        onChanged: (newVolume) {
          setState(() => volume = newVolume);
        },
        min: 0.0,
        max: 1.0,
        divisions: 10,
        label: "Volume: $volume");
  }

  Widget _pitch() {
    return Slider(
      value: pitch,
      onChanged: (newPitch) {
        setState(() => pitch = newPitch);
      },
      min: 0.5,
      max: 2.0,
      divisions: 15,
      label: "Pitch: $pitch",
      activeColor: Colors.red,
    );
  }

  Widget _rate() {
    return Slider(
      value: rate,
      onChanged: (newRate) {
        setState(() => rate = newRate);
      },
      min: 0.0,
      max: 1.0,
      divisions: 10,
      label: "Rate: $rate",
      activeColor: Colors.green,
    );
  }
}