这是在 2021 年 12 月执行此操作的方法
TexToSpeech 需要tts
在调用该方法之前进行初始化和赋值
方法一(推荐):
private void speak(String textToSay) {
AudioAttributes mPlaybackAttributes = new AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_ASSISTANT)
.setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
//add this below flag if you need the TTS to speak in a louder volume or TTS volume be heard for sure at any cost
//.setFlags(FLAG_AUDIBILITY_ENFORCED)
.build();
tts.setAudioAttributes(mPlaybackAttributes);
AudioFocusRequest mFocusRequest =
new AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN_TRANSIENT_MAY_DUCK)
.setAudioAttributes(mPlaybackAttributes)
.setAcceptsDelayedFocusGain(false)
.setWillPauseWhenDucked(false)
.build();
AudioManager am = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
am.requestAudioFocus(mFocusRequest);
tts.speak(textToSay, TextToSpeech.QUEUE_FLUSH, null, textToSay);
Handler ttsSpeak = new Handler();
Runnable checkTTSRunning = new Runnable() {
@Override
public void run() {
if (tts.isSpeaking()) {
ttsSpeak.postDelayed(this, 1000);
} else am.abandonAudioFocusRequest(mFocusRequest);
}
};
ttsSpeak.postDelayed(checkTTSRunning, 3000);
}
方法 2:仅当您需要 TTS 以更大的音量说话和/或需要不惜一切代价确保听到 TTS 音量时才使用此选项
private void speak(String textToSay) {
AudioAttributes mPlaybackAttributes = new AudioAttributes.Builder()
.setUsage(AudioAttributes.USAGE_ASSISTANT)
.setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
.setFlags(FLAG_AUDIBILITY_ENFORCED) //VERY IMPORTANT
.build();
tts.setAudioAttributes(mPlaybackAttributes);
tts.speak(textToSay, TextToSpeech.QUEUE_FLUSH, null, textToSay);
}