android text to speech

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Android provides a built-in Text-to-Speech (TTS) engine that allows developers to add text-to-speech functionality to their apps. The TTS engine can be used to read out text aloud in a variety of languages and voices.

To use the Text-to-Speech engine in an Android app, developers can use the TextToSpeech class provided by the Android SDK. Here's an example code snippet that demonstrates how to use the TextToSpeech class to convert a text string to speech:

// Create a new TextToSpeech instance
TextToSpeech tts = new TextToSpeech(context, new TextToSpeech.OnInitListener() {
    @Override
    public void onInit(int status) {
        // Check if the TextToSpeech engine is ready
        if (status == TextToSpeech.SUCCESS) {
            // Set the language for the TTS engine
            tts.setLanguage(Locale.US);
            
            // Convert a text string to speech and play it
            tts.speak("Hello, world!", TextToSpeech.QUEUE_FLUSH, null);
        }
    }
});

In this code snippet, we first create a new TextToSpeech instance by passing in a context and an OnInitListener that will be called when the TTS engine is initialized. Inside the onInit() method, we check if the TTS engine is ready by checking the status parameter. If it is, we set the language for the TTS engine to US English and convert the text string "Hello, world!" to speech using the speak() method.

The speak() method takes three parameters: the text string to convert to speech, a queue mode that specifies whether the speech should be added to the TTS engine's speech queue or replace any speech already in the queue, and an optional bundle of parameters that can be used to specify details about the speech, such as the pitch or speed.

Developers can also use the TextToSpeech engine to generate audio files from text strings using the synthesizeToFile() method. This can be useful for generating audio files that can be played back later or distributed as part of an app.