flutter pub add flutter_tts基于插件公开信息、社区数据与项目使用情况整理的选型参考。
Flutter TTS 是一个跨平台插件，可在 Flutter 应用中实现文本转语音功能。它支持 Android、iOS、Web、macOS 和 Windows 等多个平台，使开发者能够轻松地将语音输出集成到其应用中。该插件提供简单的 API，可将文本转换为语音音频，非常适合用于无障碍功能、语音助手和互动学习工具。它利用各平台的原生语音合成引擎，确保性能可靠且语音自然流畅。
以下为关联源码仓库的 README 原文快照，最新内容请访问源码仓库。
A flutter text to speech plugin (Swift,Kotlin)
OSX version: 10.15
Example App from the macOS_app branch
Website from the example directory.
Progress updates on Web
Progress updates are only supported for native speech synsthesis. Use the default engine to ensure support for progress updates. Chromium#41195426
Change the minimum Android sdk version to 21 (or higher) in your android/app/build.gradle file.
minSdkVersion 21
Update the Kotlin Gradle Plugin Version
Change the verision of the Kotlin Gradle plugin to 1.9.10.
If your project was created with a version of Flutter before 3.19, go to the android/build.gradle file and update the ext.kotlin_version:
ext.kotlin_version = '1.9.10'
Otherwise go to android/settings.gradle and update the verion of the plugin org.jetbrains.kotlin.android:
id "org.jetbrains.kotlin.android" version "1.9.10" apply false
Apps targeting Android 11 that use text-to-speech should
declare TextToSpeech.Engine.INTENT_ACTION_TTS_SERVICE
in the queries elements of their manifest.
<queries>
<intent>
<action android:name="android.intent.action.TTS_SERVICE" />
</intent>
</queries>
Android TTS does not support the pause function natively, so we have implemented a work around. We utilize the native onRangeStart() method to determine the index of start when pause is invoked. We use that index to create a new text the next time speak is invoked. Due to using onRangeStart(), pause works on SDK versions >= 26. Also, if using start and end offsets inside of setProgressHandler(), you'll need to keep a track of them if using pause since they will update once the new text is created when speak is called after being paused.
await flutterTts.pause()
There's a known issue with integrating plugins that use Swift into a Flutter project created with the Objective-C template. Flutter#16049
To use this plugin :
dependencies:
flutter:
sdk: flutter
flutter_tts:
FlutterTts flutterTts = FlutterTts();
To set shared audio instance (iOS only):
await flutterTts.setSharedInstance(true);
To set audio category and options with optional mode (iOS only). The following setup allows background music and in-app audio session to continue simultaneously:
await flutterTts.setIosAudioCategory(IosTextToSpeechAudioCategory.ambient,
[
IosTextToSpeechAudioCategoryOptions.allowBluetooth,
IosTextToSpeechAudioCategoryOptions.allowBluetoothA2DP,
IosTextToSpeechAudioCategoryOptions.mixWithOthers
],
IosTextToSpeechAudioMode.voicePrompt
);
To await speak completion.
await flutterTts.awaitSpeakCompletion(true);
To await synthesize to file completion.
await flutterTts.awaitSynthCompletion(true);
Future _speak() async{
var result = await flutterTts.speak("Hello World");
if (result == 1) setState(() => ttsState = TtsState.playing);
}
Future _stop() async{
var result = await flutterTts.stop();
if (result == 1) setState(() => ttsState = TtsState.stopped);
}
List<dynamic> languages = await flutterTts.getLanguages;
await flutterTts.setLanguage("en-US");
await flutterTts.setSpeechRate(1.0);
await flutterTts.setVolume(1.0);
await flutterTts.setPitch(1.0);
await flutterTts.isLanguageAvailable("en-US");
// iOS, Android and Web only
//see the "Pausing on Android" section for more info
await flutterTts.pause();
// iOS, macOS, and Android only
// The last parameter is an optional boolean value for isFullPath (defaults to false)
await flutterTts.synthesizeToFile("Hello World", Platform.isAndroid ? "tts.wav" : "tts.caf", false);
// Each voice is a Map containing at least these keys: name, locale
// - Windows (UWP voices) only: gender, identifier
// - iOS, macOS only: quality, gender, identifier
// - Android only: quality, latency, network_required, features
List<Map> voices = await flutterTts.getVoices;
await flutterTts.setVoice({"name": "Karen", "locale": "en-AU"});
// iOS, macOS only
await flutterTts.setVoice({"identifier": "com.apple.voice.compact.en-AU.Karen"});
// iOS only
await flutterTts.setSharedInstance(true);
// Android only
await flutterTts.speak("Hello World", focus: true);
await flutterTts.setSilence(2);
await flutterTts.getEngines;
await flutterTts.getDefaultVoice;
await flutterTts.isLanguageInstalled("en-AU");
await flutterTts.areLanguagesInstalled(["en-AU", "en-US"]);
await flutterTts.setQueueMode(1);
await flutterTts.getMaxSpeechInputLength;
await flutterTts.setAudioAttributesForNavigation();
flutterTts.setStartHandler(() {
setState(() {
ttsState = TtsState.playing;
});
});
flutterTts.setCompletionHandler(() {
setState(() {
ttsState = TtsState.stopped;
});
});
flutterTts.setProgressHandler((String text, int startOffset, int endOffset, String word) {
setState(() {
_currentWord = word;
});
});
flutterTts.setErrorHandler((msg) {
setState(() {
ttsState = TtsState.stopped;
});
});
flutterTts.setCancelHandler((msg) {
setState(() {
ttsState = TtsState.stopped;
});
});
// Android, iOS and Web
flutterTts.setPauseHandler((msg) {
setState(() {
ttsState = TtsState.paused;
});
});
flutterTts.setContinueHandler((msg) {
setState(() {
ttsState = TtsState.continued;
});
});
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For help on editing plugin code, view the documentation.