Question

我有一个speakText（）方法如下

public void speakText(){
        String toSpeak = "Testing 1 2 3";
        Toast.makeText(getApplicationContext(), toSpeak, 
        Toast.LENGTH_SHORT).show();
        mTts.speak(toSpeak, TextToSpeech.QUEUE_FLUSH, null);
}

按下按钮（即从onClick函数调用此方法）可以正常工作。但是当我在onActivityResult（）中调用此方法时，如下所示，我听不到任何东西

@Override
protected void onCreate(Bundle savedInstanceState){
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_running_ui);
    ...
    speakButton = (Button) findViewById(R.id.speakButton);
    PackageManager pm = getPackageManager();
    List<ResolveInfo> activities = pm.queryIntentActivities(new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH), 0);
    if(activities.size()==0){
        speakButton.setEnabled(false);
        Toast.makeText(getApplicationContext(), "Speech Recognizer Not Found", 1000).show();
    }
    speakButton.setOnClickListener(new OnClickListener(){
        @Override
        public void onClick(View v){
            startVoiceRecognitionActivity();
        }
    });

    commandText = (TextView) findViewById(R.id.command);
}

public void onActivityResult(int requestCode, int resultCode, Intent data){
    switch(requestCode){

    case MY_DATA_CHECK_CODE:
        if (resultCode == TextToSpeech.Engine.CHECK_VOICE_DATA_PASS) {
            // success, create the TTS instance
            mTts = new TextToSpeech(getApplicationContext(), new TextToSpeech.OnInitListener() {

                @Override
                public void onInit(int arg0) {
                    // TODO Auto-generated method stub
                    mTts.setLanguage(Locale.UK);

                }
            });


        } else {
            // missing data, install it
            Intent installIntent = new Intent();
            installIntent.setAction(
                TextToSpeech.Engine.ACTION_INSTALL_TTS_DATA);
            startActivity(installIntent);
        }
    case VOICE_RECOGNITION_REQUEST_CODE:
        if (resultCode == RESULT_OK){
            ArrayList<String> matches = data.getStringArrayListExtra(RecognizerIntent.EXTRA_RESULTS);
            commandText.setText(matches.get(0)); // get the first matching text

            speakText();

        }
    }
}

@Override
public void onPause(){
    if(mTts != null){
        mTts.stop();
        mTts.shutdown();
    }
    super.onPause();
}

我要做的是让Android手机在讲话到文本转换后说些什么。我确定该程序进入VOIC_RECOGNITION_REQUEST_CODE分支，因为它使用commandText.setText显示文本（matches.get（0））;线。

我不知道为什么textToSpeech使用按钮按下但不在onActivityResult方法内。

Answer 1

您在onPause中关闭TextToSpeech，因此mTts不再绑定到文本到语音引擎。如果您只是为了显示识别器对话框，则需要将onPause（）中的代码移动到onStop（）。

当显示语音识别器对话框时，将调用您的活动onPause（），但不会调用onStop（），除非您的活动不再可见。您还应该在onStart（）中再次将文本转换为语音。

Android TextToSpeech.speak无法在onActivityResult中使用

1 个答案: