我一直在尝试实现一种应用程序检测唤醒词的方式，例如“Hey google”或“Jarvis”。我做了一些研究，发现 porcupine 有助于解决唤醒词问题，但现在的问题是我似乎无法触发 startRecognition() 再次监听用户输入，然后继续使用它。我仍然尝试触发 startRecognition() 但它要求我执行我尝试使用豪猪 onDestroy 方法执行的 SpeechRecognizer.Destroy() 但后来它停止了工作。抱歉，如果我让任何人感到困惑，我会附上我的代码，我将非常感谢大家的帮助，因为我已经尝试解决这个问题一段时间了。
另一个问题是下面这行代码是做什么的？
PendingIntent contentIntent = PendingIntent.getActivity(
this,
0,
new Intent(this, MainActivity.class), // this line ?
0);
目前的代码:(
public class PorcupineService extends Service {
private static final int REQUEST_RECORD_AUDIO_PERMISSION_CODE = 1;
private SpeechRecognizer speechRecognizer;
TextToSpeech textToSpeech;
String userResponse;
Float speechRate = 2f;
private static final String CHANNEL_ID = "PorcupineServiceChannel";
private PorcupineManager porcupineManager;
private int numUtterances;
private void createNotificationChannel() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
NotificationChannel notificationChannel = new NotificationChannel(
CHANNEL_ID,
"Porcupine",
NotificationManager.IMPORTANCE_HIGH);
NotificationManager manager = getSystemService(NotificationManager.class);
manager.createNotificationChannel(notificationChannel);
}
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
createNotificationChannel();
PendingIntent pendingIntent = PendingIntent.getActivity(
this,
0,
new Intent(this, MainActivity.class),
0);
numUtterances = 0;
Notification notification = new NotificationCompat.Builder(this, CHANNEL_ID)
.setContentTitle("Wake word")
.setContentText("Service running")
.setSmallIcon(R.drawable.ic_launcher_foreground)
.setContentIntent(pendingIntent)
.build();
startForeground(1234, notification);
try {
porcupineManager = new PorcupineManager.Builder()
.setKeyword(Porcupine.BuiltInKeyword.JARVIS)
.setSensitivity(0.7f).build(
getApplicationContext(),
(keywordIndex) -> {
Log.i("YOU SAID IT!", "yesss");
textSpeechInitialize();
startRecognition();
listening();
numUtterances++;
PendingIntent contentIntent = PendingIntent.getActivity(
this,
0,
new Intent(this, MainActivity.class),
0);
final String contentText = numUtterances == 1 ? " time!" : " times!";
Notification n = new NotificationCompat.Builder(this, CHANNEL_ID)
.setContentTitle("Wake word")
.setContentText("Detected " + numUtterances + contentText)
.setSmallIcon(R.drawable.ic_launcher_background)
.setContentIntent(contentIntent)
.build();
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
assert notificationManager != null;
notificationManager.notify(1234, n);
});
porcupineManager.start();
} catch (PorcupineException e) {
Log.e("PORCUPINE", e.toString());
}
return super.onStartCommand(intent, flags, startId);
}
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public void onDestroy() {
try {
porcupineManager.stop();
porcupineManager.delete();
speechRecognizer.destroy();
} catch (PorcupineException e) {
Log.e("PORCUPINE", e.toString());
}
super.onDestroy();
}
public void listening(){
speechRecognizer = SpeechRecognizer.createSpeechRecognizer(this);
speechRecognizer.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) {
String errorMessage = getErrorText(error);
Log.i(">>> INFO", "Failed " + errorMessage);
}
@Override
public void onResults(Bundle results) {
ArrayList<String> matches = results.getStringArrayList(SpeechRecognizer.RESULTS_RECOGNITION);
userResponse = matches.get(0);
userResponse = userResponse.toLowerCase();
toSpeak(userResponse);
}
@Override
public void onPartialResults(Bundle partialResults) {}
@Override
public void onEvent(int eventType, Bundle params) {}
});
}
public void textSpeechInitialize(){
textToSpeech = new TextToSpeech(getApplicationContext(), new TextToSpeech.OnInitListener() {
@Override
public void onInit(int status) {
if (status == TextToSpeech.SUCCESS){
textToSpeech.setLanguage(Locale.getDefault());
textToSpeech.setSpeechRate(speechRate);
String greet = greetings();
toSpeak(greet);
startRecognition();
} else {
Toast.makeText(getApplicationContext(), "Feature not supported", Toast.LENGTH_SHORT).show();
}
}
});
}
public String getErrorText(int errorCode) {
String message;
switch (errorCode) {
...
}
return message;
}
public static String greetings(){
String s = "";
Calendar c = Calendar.getInstance();
int time = c.get(Calendar.HOUR_OF_DAY);
if (time >= 0 && time < 12){
s = "Good Morning sir! how can I help you today?";
} else if (time >= 12 && time < 16){
s = "Good Afternoon sir";
} else if (time >= 16 && time < 22){
s = "Good Evening sir";
}
else if (time >= 22 && time < 24){
s = "Hello sir, you need to take some rest... its getting late!";
}
return s;
}
private void startRecognition() {
Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, getPackageName());
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE, "en");
speechRecognizer.startListening(intent);
}
private void toSpeak(String toSpeak){
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
Log.i(">>>Voice Info", String.valueOf(textToSpeech.getVoice()));
}
try {
textToSpeech.speak(toSpeak, TextToSpeech.QUEUE_FLUSH, null);
} catch (Exception e){
e.printStackTrace();
}
}
}