我想在Text To Speech停止后立即开始语音识别。以下是我采取的步骤。
第1步:初始化语音识别。
mSpeechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
mSpeechRecognizer.setRecognitionListener(recognitionListener);
mSpeechRecognizerIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE,
Locale.getDefault());
第2步:初始化文本到语音。
TextToSpeech myTTS = new TextToSpeech(this, new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if(myTTS.getEngines().size() == 0){
Toast.makeText(Robo.this,"No Engines Installed",Toast.LENGTH_LONG).show();
}else{
if (status == TextToSpeech.SUCCESS){
//Toast.makeText(MainActivity.this,"Status working.",Toast.LENGTH_LONG).show();
//message = "How may i help you.";
myTTS.setLanguage(Locale.US);
ttsInitialized();
speak("what is your name.");
}
}
}
});
步骤3:初始化话语监听器以检查语音是否完成。
myTTS.setOnUtteranceProgressListener(new UtteranceProgressListener() {
@Override
public void onStart(String utteranceId) {
}
@Override
public void onDone(String utteranceId) {
//btn.performClick();
myTTS.shutdown();
mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
}
@Override
public void onError(String utteranceId) {
}
});
在onDone()方法中mSpeechRecognizer.startListening(mSpeechRecognizerIntent);用于启动语音识别,但它不启动语音识别。请调查问题。
onDone方法指的是特定的话语。这意味着如果对mTTS.speak方法执行多个(连续)调用,则每次调用onDone。这显然会导致你想要达到的严重问题。
当我必须在TTS完成后执行操作时,我会创建一个像lastUtteranceId这样的变量,将其设置为最后一个排队的话语并检查onDone内的匹配,如:
if (utteranceId.equals(lastUtteranceId) {
// TTS finished talking...
}
此外,调用关机似乎是一个坏主意。你应该在你的活动的onDestroy方法上调用它。
最后,我认为onDone在后台线程上运行,startListening需要在主线程上运行,所以也要检查一下。
正如@Regulus所说,我添加了一个Handler并且它有效。
@Override
public void onDone(String utteranceId) {
Handler mainHandler = new Handler(Looper.getMainLooper());
Runnable myRunnable = new Runnable() {
@Override
public void run() {
mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
} // This is your code
};
mainHandler.post(myRunnable);
}