问 Android文本到语音播放没有错误，但不产生任何声音。

EN

我有一个应用程序可以播放一些文字到语音。它工作得很好，但我有个人抱怨说，他在“三星Galaxy 5G上的安卓10”上听不到任何声音。从我所做的测试来看，代码似乎是在没有任何错误的情况下执行的，甚至在应该听到文本时也会暂停，但是没有发出任何声音。检查过的东西：

1. TTS引擎是google，但是它不能同时在Google和三星上工作。在TTS设置下的
2. 当你点击播放时，你可以听到回放示例。
3. 该语言被设置为英语US

TTS init代码：

private void initTTS() {
    Log.d(TAG, "initTTS: Enter");
    //assume the worst
    mTTSInit = false;
    //create a TTS and do not use it until you get a confirmation that the init process went well
    mTTS = new TextToSpeech(this, status -> {
        //OnInit of TTS is run on the main thread and so is VERY slow
        new Thread(() -> {
            if (status == TextToSpeech.SUCCESS) {
                //use English - not sure about other languages at the moment.
                mTTS.setSpeechRate(0.7f);
                mTTS.setPitch(1.1f);
                int result = mTTS.setLanguage(Locale.US);
                if (result == TextToSpeech.LANG_MISSING_DATA
                        || result == TextToSpeech.LANG_NOT_SUPPORTED) {
                    Log.e("TTS", "Language not supported");
                    //notify the user that TTS will not work on this device
                    showToastOnUIThread(getResources().getString(R.string.TTS_missing_lang_error));
                } else {
                    Log.d(TAG, "onInit: SUCCESS");
                    //Init went fine.
                    //Set a listener when the TTS message finish as we sometime want
                    //to chime if a tile with a gem was produced.
                    mTTS.setOnUtteranceProgressListener(new UtteranceProgressListener() {
                        @Override
                        public void onStart(String utteranceId) {
                            showToastOnUIThread("About to play message - raising volume");
                            AudioManager am = (AudioManager) getSystemService(getApplicationContext().AUDIO_SERVICE);
                            am.setStreamVolume(AudioManager.STREAM_MUSIC,
                                    am.getStreamMaxVolume(AudioManager.STREAM_MUSIC),
                        @Override
                        public void onDone(String utteranceId) {
                            Log.d(TAG, "onDone: TTS: " + utteranceId);
                            showToastOnUIThread("Message was: " + utteranceId);
                            playChimeSound();
                        @Override
                        public void onError(String utteranceId) {
                            Log.d(TAG, "onError: TTS error while trying to say: " + utteranceId);
                    mTTSInit = true;
                    runOnUiThread(() -> mTTSStatusButton.setVisibility(View.GONE));
            } else {
                Log.e("TTS", "Initialization failed");
                //notify the user that TTS will not work on this device
                showToastOnUIThread(getResources().getString(R.string.TTS_missing_lang_error));
        }).start();
}

TTS回放代码：

if (readOutLoud && mTTSInit) {
        String text = getString(R.string.tile) + " " + mViewModel.getLastSelectedTile();
        //to get a call back from TTS we mst supply a KEY_PARAM_UTTERANCE_ID