如何在 Text To Speech 停止时启动语音识别。

debugcn 发表于 Dev

兰吉特·瓦马德万

我想在 Text To Speech 停止后立即启动语音识别。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());

步骤 2：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 Utterance Listener 以检查 Speech 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，但不启动语音识别。请看问题。

兰吉特·瓦马德万

正如@Regulus 所说，我添加了一个 Handler 并且它起作用了。

    @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);

    }

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