Google Cloud Speech API add SpeechContext

问题

I would like to add some keywords to my app, so the API can recognize more efficiently the spoken words. For example Im having trouble recognizing the some Italian words that starts with E ,(E` per me) for example. Or in German (er geht).

Here is my code:

public void recognize (int sampleRate) {
    if (mApi == null) {
        Log.w(TAG, "API not ready. Ignoring the request.");
        return;
    }
    // Configure the API
    mRequestObserver = mApi.streamingRecognize(mResponseObserver);
    mRequestObserver.onNext(StreamingRecognizeRequest.newBuilder()
            .setStreamingConfig(StreamingRecognitionConfig.newBuilder()
                    .setConfig(RecognitionConfig.newBuilder()
                            .setLanguageCode(getDefaultLanguageCode())
                            .setEncoding(RecognitionConfig.AudioEncoding.LINEAR16)
                            .setSampleRateHertz(sampleRate)
                            .build())
                    .setInterimResults(true)
                    .setSingleUtterance(true)
                    .build())
            .build());
}

Setting the language for different cases :

private String getDefaultLanguageCode() {

    SharedPreferences getLangSharedPrefs = getSharedPreferences("langSelected",0);
    String selectedLanguage = getLangSharedPrefs.getString("langSelected", null);
    switch (selectedLanguage) {
        case "German":
            langaugeCode = "de-DE";
            break;
        case "Italian":
            langaugeCode = "it-IT";
            break;
        case "Spanish" :
            langaugeCode = "es-ES";
            break;
        case "French" :
            langaugeCode = "fr-FR";
            break;
    }
    return langaugeCode;
}

回答1:

I found the solution :

 public void startRecognizing(int sampleRate) {
    if (mApi == null) {
        Log.w(TAG, "API not ready. Ignoring the request.");
        return;
    }
    // Configure the API
    mRequestObserver = mApi.streamingRecognize(mResponseObserver);
    SpeechContext.Builder speechBuilder = SpeechContext.newBuilder();
    speechBuilder.addPhrases("E per me");
    speechBuilder.addPhrases("E");
    mRequestObserver.onNext(StreamingRecognizeRequest.newBuilder()
            .setStreamingConfig(StreamingRecognitionConfig.newBuilder()
                    .setConfig(RecognitionConfig.newBuilder()
                            .setLanguageCode(getDefaultLanguageCode())
                            .setEncoding(RecognitionConfig.AudioEncoding.LINEAR16)
                            .setSampleRateHertz(sampleRate)
                            .addSpeechContexts(speechBuilder)
                            .build())
                    .setInterimResults(true)
                    .setSingleUtterance(true)
                    .build())
            .build());
}

来源：https://stackoverflow.com/questions/45545278/google-cloud-speech-api-add-speechcontext