这是我的代码:
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create_route);
SetupButton();
}
private void SetupButton()
{
Button createNewMessage = (Button) findViewById(R.id.button);
createNewMessage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ListenForNewMessage();
}
});
}
private void ListenForNewMessage()
{
final SpeechRecognizer newDeliverySpeech = SpeechRecognizer.createSpeechRecognizer(this);
RecognitionListener newDeliveryRecognitionListener = new RecognitionListener() {
@Override
public void onReadyForSpeech(Bundle params) {
Log.d("SpeechListening","onReadyForSpeech");
}
@Override
public void onBeginningOfSpeech() {
Log.d("SpeechListening","onBeginningOfSpeech");
}
@Override
public void onRmsChanged(float rmsdB) {
//do nothing
}
@Override
public void onBufferReceived(byte[] buffer) {
//do nothing
}
@Override
public void onEndOfSpeech() {
Log.d("SpeechListening","onEndOfSpeech");
}
@Override
public void onError(int error) {
//do nothing
}
@Override
public void onResults(Bundle results) {
ArrayList<String> userMessage;
userMessage = results.getStringArrayList(RESULTS_RECOGNITION);
PushNewDelivery(userMessage);
}
@Override
public void onPartialResults(Bundle partialResults) {
//do nothing
}
@Override
public void onEvent(int eventType, Bundle params) {
//do nothing
}
};
newDeliverySpeech.setRecognitionListener(newDeliveryRecognitionListener);
if (newDeliverySpeech.isRecognitionAvailable(getApplicationContext()))
{
Log.d("SpeechListening","started listening hopefully");
newDeliverySpeech.startListening(new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH));
}
}
}
问题是,只记录了开始聆听希望,RecognitionListener
从未调用onReadyForSpeech()
或其任何方法。
细节 细节 细节 细节 有人可以告诉我这里我做错了吗?
答案 0 :(得分:1)
您基本上是在创建一个新的SpeechRecognizer对象,并在每次单击按钮时注册一个新的侦听器。最重要的是,您使用当前的Activity Context创建SpeechRecognizer,但在调用时实际上是在使用Application上下文:isRecognitionAvailable();
尝试将SpeechRecognizer创建为成员对象,并在调用onCreate()时注册侦听器。还要尽量避免使用Application上下文来避免内存泄漏。
以下是您应该如何操作的示例。
private SpeechRecognizer mDeliverySpeech;
private Intent mSpeechIntent;
private boolean mListening = false;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_create_route);
SetupButton();
SetupSpeechRecognizer();
mSpeechIntent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
mSpeechIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_PREFERENCE, "en");
mSpeechIntent.putExtra(RecognizerIntent.EXTRA_CALLING_PACKAGE, this.getPackageName());
mSpeechIntent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
mSpeechIntent.putExtra(RecognizerIntent.EXTRA_MAX_RESULTS, 3);
}
private void SetupButton()
{
Button createNewMessage = (Button) findViewById(R.id.button);
createNewMessage.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ListenForNewMessage();
}
});
}
private void SetupSpeechRecognizer()
{
mDeliverySpeech = SpeechRecognizer.createSpeechRecognizer(this);
RecognitionListener newDeliveryRecognitionListener = new RecognitionListener() {
@Override
public void onReadyForSpeech(Bundle params) {
Log.d("SpeechListening","onReadyForSpeech");
}
@Override
public void onBeginningOfSpeech() {
Log.d("SpeechListening","onBeginningOfSpeech");
}
@Override
public void onRmsChanged(float rmsdB) {
//do nothing
}
@Override
public void onBufferReceived(byte[] buffer) {
//do nothing
}
@Override
public void onEndOfSpeech() {
Log.d("SpeechListening","onEndOfSpeech");
}
@Override
public void onError(int error) {
//do nothing
}
@Override
public void onResults(Bundle results) {
ArrayList<String> userMessage;
userMessage = results.getStringArrayList(RESULTS_RECOGNITION);
PushNewDelivery(userMessage);
}
@Override
public void onPartialResults(Bundle partialResults) {
//do nothing
}
@Override
public void onEvent(int eventType, Bundle params) {
//do nothing
}
};
mDeliverySpeech.setRecognitionListener(newDeliveryRecognitionListener);
}
private void ListenForNewMessage()
{
if (mDeliverySpeech.isRecognitionAvailable(this) && !mListening)
{
Log.d("SpeechListening","started listening hopefully");
mListening = true;
mDeliverySpeech.startListening(mSpeechIntent);
new CountDownTimer(5000, 5000) {
public void onTick(long millisUntilFinished) {}
public void onFinish() {
mDeliverySpeech.stopListening();
mListening = false;
}
}.start();
}
}
在使用侦听器时,不要忘记正确处理活动生命周期,以避免内存泄漏。