我正在编写一个具有WebView的应用程序，它通过WebRTC处理语音呼叫 . 麦克风工作正常，因为我已授予WebView权限 .

webView.setWebChromeClient(new WebChromeClient() {

@Override

public void onPermissionRequest(final PermissionRequest request) {

request.grant(request.getResources());

}

后来我决定添加SpeechRecognizer，以便我能够在WebRTC调用期间识别出我在说什么 . 我尝试在同一个活动中进行语音识别工作，后来我在一个单独的服务中完成了它，但不幸的是，它不允许同时工作 . 麦克风被WebView占用，而SpeechRecognizer没有任何声音(RMS一直是-2.12) . 或者，如果我在通过WebView拨打电话之前尝试运行服务，我打电话给的人根本听不到我的声音(SpeechRecognizer占用麦克风而WebView没有得到任何东西) . 如果存在，我希望找到任何解决方案 . 我不是iOS开发人员，但我听说，它可能在iPhone上，所以这是一个惊喜，这在Android设备上是不可能的 . 我的语音识别服务代码公共类RecognitionService extends Service实现RecognitionListener {

private String LOG_TAG = "RecognitionService";

private SpeechRecognizer speech = null;

private Intent recognizerIntent;

public RecognitionService() {

}

@Override

public IBinder onBind(Intent intent) {

// TODO: Return the communication channel to the service.

startRecognition();

return null;

}

@Override

public void onCreate() {

Log.i("Test", "RecognitionService: onCreate");

startRecognition();

}

private void startRecognition() {

speech = SpeechRecognizer.createSpeechRecognizer(this);

speech.setRecognitionListener(this);

recognizerIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);

recognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_PREFERENCE,

"ru-RU");

recognizerIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE,

getPackageName());

recognizerIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,

RecognizerIntent.LANGUAGE_MODEL_WEB_SEARCH);

recognizerIntent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 3);

speech.startListening(recognizerIntent);

}

@Override

public void onBeginningOfSpeech() {

Log.i(LOG_TAG, "onBeginningOfSpeech");

}

@Override

public void onBufferReceived(byte[] buffer) {

Log.i(LOG_TAG, "onBufferReceived: " + buffer);

}

@Override

public void onEndOfSpeech() {

Log.i(LOG_TAG, "onEndOfSpeech");

}

@Override

public void onError(int errorCode) {

String errorMessage = getErrorText(errorCode);

Log.d(LOG_TAG, "FAILED " + errorMessage);

speech.destroy();

startRecognition();

}

@Override

public void onEvent(int arg0, Bundle arg1) {

Log.i(LOG_TAG, "onEvent");

}

@Override

public void onPartialResults(Bundle arg0) {

Log.i(LOG_TAG, "onPartialResults");

}

@Override

public void onReadyForSpeech(Bundle arg0) {

Log.i(LOG_TAG, "onReadyForSpeech");

}

@Override

public void onResults(Bundle results) {

Log.i(LOG_TAG, "onResults");

ArrayList matches = results

.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);

String text = "";

for (String result : matches)

text += result + "\n";

Toast.makeText(getApplicationContext(),text,Toast.LENGTH_SHORT).show();

speech.destroy();

startRecognition();

}

public static String getErrorText(int errorCode) {

String message;

switch (errorCode) {

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;

}

return message;

}

@Override

public void onRmsChanged(float rmsdB) {

Log.i(LOG_TAG, "onRmsChanged: " + rmsdB);

}

}