Android文本转语音设置印度口音无效，仍为美式口音求助

Hey there! Let's troubleshoot why your TTS app is stuck on the American accent even after trying to set the Indian English locale. Here are the most likely fixes to resolve this:

1. Verify the Indian English Voice Pack is Installed #

Android TTS relies on system-installed voice packs, and the Indian English (en-IN) pack might not be present by default.

• Go to your device's Settings > System > Languages & input > Text-to-speech output
• Select your TTS engine (preferably Google Text-to-Speech)
• Check if "English (India)" is listed under available voices. If not, tap "Install voice data" and download the Indian English pack.

2. Ensure Correct Locale Configuration in Code #

Double-check that you're setting the locale properly. A common mistake is using the wrong locale identifier. Use this code snippet to set Indian English correctly:

// Initialize TTS first
TextToSpeech tts = new TextToSpeech(getApplicationContext(), status -> {
    if (status == TextToSpeech.SUCCESS) {
        // Create Indian English locale
        Locale indianEnglish = new Locale("en", "IN");
        // Or use Locale.forLanguageTag("en-IN") for API 24+
        
        // Check if the locale is supported
        int langResult = tts.setLanguage(indianEnglish);
        if (langResult == TextToSpeech.LANG_MISSING_DATA) {
            Log.e("TTS_ERROR", "Indian English voice data is missing");
        } else if (langResult == TextToSpeech.LANG_NOT_SUPPORTED) {
            Log.e("TTS_ERROR", "Indian English is not supported by your TTS engine");
        } else {
            // Speak with Indian accent
            tts.speak("Hello, welcome to the app!", TextToSpeech.QUEUE_FLUSH, null, "tts_request");
        }
    }
});

Pro tip: Always check the return value of setLanguage() — it tells you exactly if the locale is supported or if data is missing.

3. Confirm the TTS Engine Supports Indian English #

Not all TTS engines support every locale. Stick to Google Text-to-Speech as it has broad support for regional accents. To enforce using Google TTS (if multiple engines are installed), you can check for supported engines in your code:

// Check available TTS engines
List<TextToSpeech.EngineInfo> engines = tts.getEngines();
for (TextToSpeech.EngineInfo engine : engines) {
    if (engine.name.equals("com.google.android.tts")) {
        // Set Google TTS as the default engine
        tts.setEngineByPackageName("com.google.android.tts");
        break;
    }
}

4. Select the Exact Indian English Voice in System Settings #

Even if the en-IN locale is set, some engines have multiple voices for the same language.

• Go back to Text-to-speech output settings
• Under "Voice", select the specific voice labeled "English (India)" (e.g., "Google India English") instead of generic "English" options.

5. Check Code Execution Order #

Make sure you're setting the locale after the TTS engine is fully initialized (inside the onInit callback) and before calling speak(). If you set the locale too early, it won't take effect.

Give these steps a try — most of the time, the issue boils down to missing voice data or incorrect locale setup. Let me know if you still run into problems!

内容的提问来源于stack exchange，提问作者Pranav