我正在使用aidl在服务中调用语音识别。识别发生在服务中并将识别传递回应用程序。
问题是startListening方法创建了一个异常：
java.lang.RuntimeException: SpeechRecognizer should be used only from the application's main thread
at android.speech.SpeechRecognizer.checkIsCalledFromMainThread(SpeechRecognizer.java:325)
at android.speech.SpeechRecognizer.startListening(SpeechRecognizer.java:266)
at .InputService$InputBind.speechActivated(InputService.java:79)
at .InputBinder$Stub.onTransact(InputBinder.java:50)
at android.os.Binder.execTransact(Binder.java:461)
这是我的服务：
public class InputService extends Service implements Actions , Constants {
private static final int VOICE_MAX_RESULTS = 5;
private SpeechRecognizer speechRecognizer;
private static final String TAG = "InputService";
private InputBind inputBind;
@Override
public IBinder onBind(Intent intent) {
Log.d(TAG , "onBind called");
if (speechRecognizer == null){
speechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
}
speechRecognizer.setRecognitionListener(inputBind);
inputBind = new InputBind(speechRecognizer);
return (inputBind);
}
@Override
public void onCreate() {
super.onCreate();
Log.d(TAG , "Service created");
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
return START_STICKY;
}
@Override
public void onDestroy() {
super.onDestroy();
}
private static class InputBind extends InputBinder.Stub implements RecognitionListener{
private InputCallback callback;
private SpeechRecognizer speechRecognizer;
public InputBind(SpeechRecognizer speechRecognizer){
this.speechRecognizer = speechRecognizer;
}
@Override
public void speechActivated(InputCallback cb) throws RemoteException {
callback = cb;
Intent recognizerIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
recognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, "cmn-Hans-CN");
recognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, "cmn-Hans-HK");
recognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
recognizerIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE,"voice.recognition.test");
recognizerIntent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, VOICE_MAX_RESULTS);
speechRecognizer.startListening(recognizerIntent);
}
@Override
public void onReadyForSpeech(Bundle params) {
try {
callback.readyForSpeech();
} catch (RemoteException e) {
e.printStackTrace();
}
}
@Override
public void onBeginningOfSpeech() {
}
@Override
public void onRmsChanged(float rmsdB) {
}
@Override
public void onBufferReceived(byte[] buffer) {
}
@Override
public void onEndOfSpeech() {
try {
callback.speechEnded();
} catch (RemoteException e) {
e.printStackTrace();
}
}
@Override
public void onError(int error) {
try {
callback.speechEnded();
} catch (RemoteException e) {
e.printStackTrace();
}
}
@Override
public void onResults(Bundle results) {
boolean foundWord = false;
Log.v(TAG , "onResults Called" );
ArrayList data =results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
for (int i = 0; i < data.size(); i++)
{
Log.d(TAG, "result " + data.get(i) );
String result = data.get(i).toString();
switch (result){
case LEFT_ENG:
case LEFT_CH:
foundWord = true;
try {
callback.onInputReceived(LEFT);
} catch (RemoteException e) {
e.printStackTrace();
}
break;
case RIGHT_ENG:
case RIGHT_CH:
foundWord = true;
try {
callback.onInputReceived(RIGHT);
} catch (RemoteException e) {
e.printStackTrace();
}
break;
case SELECT_ENG:
case SELECT_CH:
foundWord = true;
try {
callback.onInputReceived(SELECT);
} catch (RemoteException e) {
e.printStackTrace();
}
break;
case BACK_ENG:
case BACK_CH:
foundWord = true;
try {
callback.onInputReceived(BACK);
} catch (RemoteException e) {
e.printStackTrace();
}
break;
case BASKET_ENG:
case BASKET_CH:
foundWord = true;
try {
callback.onInputReceived(BASKET);
} catch (RemoteException e) {
e.printStackTrace();
}
break;
case EXIT_ENG:
case EXIT_CH:
foundWord = true;
try {
callback.onInputReceived(EXIT);
} catch (RemoteException e) {
e.printStackTrace();
}
break;
}
if(foundWord)
return;
}
}
@Override
public void onPartialResults(Bundle partialResults) {
}
@Override
public void onEvent(int eventType, Bundle params) {
}
}
}
speechActivated是我想要激活语音识别时在主应用程序中调用的方法。 为什么它说我不在主线程上？我还能在哪里调用startListening？
答案 0 :(得分：0)