我正在努力在Android上创建语音识别服务，并遵循其他人之前的作品。旧版本基于Android 5.0.1，它工作得非常好。 但是，当我尝试将其移动到android 5.1时，它总是在识别侦听器中的onError函数中停止，错误代码为7，这意味着ERROR_NO_MATCH。 我不知道为什么会这样。在Android 5.0.1和5.1中使用语音识别器有什么区别吗？ 如果有人可以帮助我，我将非常感激。感谢。
这是我的代码：
public class speechrecognitionService extends Service
{
protected static AudioManager mAudioManager;
protected SpeechRecognizer mSpeechRecognizer;
protected Intent mSpeechRecognizerIntent;
protected final Messenger mServerMessenger = new Messenger(new IncomingHandler(this));
protected boolean mIsListening;
protected volatile boolean mIsCountDownOn;
private static boolean mIsStreamSolo;
private static String voiceCommand;
static final int MSG_RECOGNIZER_START_LISTENING = 1;
static final int MSG_RECOGNIZER_CANCEL = 2;
public static final String TAG = null;
public static final String FEEDBACK = "com.kut.kutcamera";
public static final String COMMAND = "command";
public static final String standardVoiceCommand = "take a photo";
public static final String voiceCommandAlt1 = "take photo";
public static final String voiceCommandAlt2 = "photo";
public static final String voiceCommandAlt3 = "take";
@Override
public void onCreate()
{
super.onCreate();
mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
mSpeechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
mSpeechRecognizer.setRecognitionListener(new SpeechRecognitionListener());
mSpeechRecognizerIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
mSpeechRecognizerIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE,
this.getPackageName());
Toast.makeText(this, "Service is created", Toast.LENGTH_LONG).show();
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// TODO Auto-generated method stub
Toast.makeText(this, "Say your command loud and clear please.", Toast.LENGTH_LONG).show();
mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
//startListenting(true);
//int result = super.onStartCommand(intent,flags,startId);
return super.onStartCommand(intent, flags, startId);
}
protected static class IncomingHandler extends Handler
{
private WeakReference<speechrecognitionService> mtarget;
IncomingHandler(speechrecognitionService target)
{
mtarget = new WeakReference<speechrecognitionService>(target);
}
@Override
public void handleMessage(Message msg)
{
final speechrecognitionService target = mtarget.get();
switch (msg.what)
{
case MSG_RECOGNIZER_START_LISTENING:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
{
// turn off beep sound
if (!mIsStreamSolo)
{
mAudioManager.setStreamSolo(AudioManager.STREAM_VOICE_CALL, true);
mIsStreamSolo = true;
}
}
if (!target.mIsListening)
{
target.mSpeechRecognizer.startListening(target.mSpeechRecognizerIntent);
target.mIsListening = true;
//Log.d(TAG, "message start listening"); //$NON-NLS-1$
}
break;
case MSG_RECOGNIZER_CANCEL:
if (mIsStreamSolo)
{
mAudioManager.setStreamSolo(AudioManager.STREAM_VOICE_CALL, false);
mIsStreamSolo = false;
}
target.mSpeechRecognizer.cancel();
target.mIsListening = false;
//Log.d(TAG, "message canceled recognizer"); //$NON-NLS-1$
break;
}
}
}
// Count down timer for Jelly Bean work around
protected CountDownTimer mNoSpeechCountDown = new CountDownTimer(30000, 1000)
{
@Override
public void onTick(long millisUntilFinished)
{
// TODO Auto-generated method stub
}
@Override
public void onFinish()
{
mIsCountDownOn = false;
Message message = Message.obtain(null, MSG_RECOGNIZER_CANCEL);
try
{
mServerMessenger.send(message);
message = Message.obtain(null, MSG_RECOGNIZER_START_LISTENING);
mServerMessenger.send(message);
}
catch (RemoteException e)
{
}
}
};
@Override
public void onDestroy()
{
super.onDestroy();
if (mIsCountDownOn)
{
mNoSpeechCountDown.cancel();
}
if (mSpeechRecognizer != null)
{
mSpeechRecognizer.destroy();
//Toast.makeText(speechrecognitionService.this, "the recognizer is destroyed", Toast.LENGTH_LONG).show();
}
}
protected class SpeechRecognitionListener implements RecognitionListener
{
@Override
public void onBeginningOfSpeech()
{
// speech input will be processed, so there is no need for count down anymore
if (mIsCountDownOn)
{
mIsCountDownOn = false;
mNoSpeechCountDown.cancel();
}
//Log.d(TAG, "onBeginingOfSpeech"); //$NON-NLS-1$
}
@Override
public void onBufferReceived(byte[] buffer)
{
}
@Override
public void onEndOfSpeech()
{
//Log.d(TAG, "onEndOfSpeech"); //$NON-NLS-1$
}
@Override
public void onError(int error)
{
Log.d(TAG, "onError: " + error);
if ((error == SpeechRecognizer.ERROR_NO_MATCH)
|| (error == SpeechRecognizer.ERROR_SPEECH_TIMEOUT)){
if (mIsCountDownOn)
{
mIsCountDownOn = false;
mNoSpeechCountDown.cancel();
}
mIsListening = false;
Log.d("TESTING: SPEECH SERVICE: CALL START", "onError()");
startListening(true);
}
}
@Override
public void onEvent(int eventType, Bundle params)
{
}
@Override
public void onPartialResults(Bundle partialResults)
{
}
@Override
public void onReadyForSpeech(Bundle params)
{
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
{
mIsCountDownOn = true;
mNoSpeechCountDown.start();
}
//Toast.makeText(speechrecognitionService.this, "Please say your command loudly and clearly", Toast.LENGTH_LONG).show();
}
@Override
public void onResults(Bundle results)
{
//Log.d(TAG, "onResults"); //$NON-NLS-1$
ArrayList strlist = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
voiceCommand = (String) strlist.get(0);
Toast.makeText(speechrecognitionService.this, voiceCommand, Toast.LENGTH_LONG).show();
if (voiceCommand.equals(standardVoiceCommand) || voiceCommand.equals(voiceCommandAlt1)
|| voiceCommand.equals(voiceCommandAlt2)||voiceCommand.equals(voiceCommandAlt3))
publishResults();
else {
Toast.makeText(speechrecognitionService.this, "Say the command again please.", Toast.LENGTH_LONG).show();
mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
}
}
@Override
public void onRmsChanged(float rmsdB)
{
}
private void startListening(boolean bMuteSound){
Log.d("TESTING: SPEECH SERVICE: startListening()", mIsListening? "true":"false");
if (bMuteSound==true && Build.VERSION.SDK_INT >= 16)//Build.VERSION_CODES.JELLY_BEAN)
{
// turn off beep sound
mAudioManager.setStreamMute(AudioManager.STREAM_SYSTEM, true);
}
if (!mIsListening)
{
mSpeechRecognizer.startListening(mSpeechRecognizerIntent);
//recognizeSpeechDirectly ();
mIsListening = true;
}
}
}
@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}
private void publishResults() {
Intent intent = new Intent(FEEDBACK);
intent.putExtra(COMMAND, voiceCommand);
//intent.putExtra(RESULT, result);
sendBroadcast(intent);
}
}