我的程序中有语音识别器,当我直接在 onCreate 方法中运行 startListening 方法时,语音识别器似乎不起作用。 但是当我将 startListening 方法放在按钮 onClick 方法中时,语音识别器正在工作。我希望直接调用语音识别器方法 startListening,如下面的程序所示。
以下是我的程序。
SpeechRecognizer mSpeechRecognizer;
Intent mSpeechRecognizerIntent;
TextView textView;
String speakId = "one";
String oldId = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_robo);
textView = (TextView) findViewById(R.id.textView);
mSpeechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
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());
mSpeechRecognizer.setRecognitionListener(new RecognitionListener() {
@Override
public void onReadyForSpeech(Bundle params) {
}
@Override
public void onBeginningOfSpeech() {
}
@Override
public void onRmsChanged(float rmsdB) {
}
@Override
public void onBufferReceived(byte[] buffer) {
}
@Override
public void onEndOfSpeech() {
}
@Override
public void onError(int error) {
}
@Override
public void onResults(Bundle results) {
ArrayList<String> matches = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
textView.setText(matches.get(0));
//displaying the first match
//if (matches != null)
//processResult(matches.get(0));
}
@Override
public void onPartialResults(Bundle partialResults) {
}
@Override
public void onEvent(int eventType, Bundle params) {
}
});
/*
below SpeechRecognizer does not start listening when called in MainActivity.
*/
mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
}
}
但是当我在按钮 onClick 事件中调用 mSpeechRecognizer.startListening(mSpeechRecognizerIntent) 时,SpeechRecognizer 正在工作。
public void Listen(View view) {
mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
}
为什么当代码放在 onCreate 方法中而不是放在 onClick 方法中时不起作用。 请告知解决方案。
我刚刚在 createSpeechRecognizer 之后设置了使用的 setRecognitionListener 并且代码正在运行。
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());
然后打电话
mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
它无需使用按钮事件即可工作。
RecogniserListener 类应该这样声明。
RecognitionListener recognitionListener = new RecognitionListener() {
@Override
public void onReadyForSpeech(Bundle params) {
}
@Override
public void onBeginningOfSpeech() {
}
@Override
public void onRmsChanged(float rmsdB) {
}
@Override
public void onBufferReceived(byte[] buffer) {
}
@Override
public void onEndOfSpeech() {
}
@Override
public void onError(int error) {
String message;
switch (error) {
case SpeechRecognizer.ERROR_AUDIO:
message = "Audio recording error";
break;
case SpeechRecognizer.ERROR_CLIENT:
message = "Client side error";
break;
case SpeechRecognizer.ERROR_INSUFFICIENT_PERMISSIONS:
message = "Insufficient permissions";
break;
case SpeechRecognizer.ERROR_NETWORK:
message = "Network error";
break;
case SpeechRecognizer.ERROR_NETWORK_TIMEOUT:
message = "Network timeout";
break;
case SpeechRecognizer.ERROR_NO_MATCH:
message = "No match";
break;
case SpeechRecognizer.ERROR_RECOGNIZER_BUSY:
message = "RecognitionService busy";
break;
case SpeechRecognizer.ERROR_SERVER:
message = "error from server";
break;
case SpeechRecognizer.ERROR_SPEECH_TIMEOUT:
message = "No speech input";
break;
default:
message = "Didn't understand, please try again.";
break;
}
textView.setText(message);
}
@Override
public void onResults(Bundle results) {
ArrayList<String> matches = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
textView.setText(matches.get(0));
//displaying the first match
//if (matches != null)
//processResult(matches.get(0));
}
@Override
public void onPartialResults(Bundle partialResults) {
}
@Override
public void onEvent(int eventType, Bundle params) {
}
};
已取得 root 权限的设备的行为可能有所不同,请检查未取得 root 权限的设备。
对于未root的设备
onRmsChanged 可能会抛出错误, 所以在RecognitionListener的所有方法中至少添加一个Log。