android - Can I keep the speech recognizer listening indefinitely?

Question

When I call the startListening method of a SpeechRecognizer object, the speech recognizer starts listening for speech. I would like to create a service that is waiting for speech of a specific keyword: when the user says this keyword and the speech recognizer detects this keyword, then the service becomes ready to receive user voice commands.

To this end, after a new SpeechRecognizer instantiated, I should call its startListening method: can I keep the speech recognizer listening indefinitely?

Answer 1

The Android Speech recognizer can be customized through the intent extra data. See the android documentation.

public static final String EXTRA_SPEECH_INPUT_COMPLETE_SILENCE_LENGTH_MILLIS

The amount of time that it should take after we stop hearing speech to consider the input complete. [...]

public static final String EXTRA_SPEECH_INPUT_MINIMUM_LENGTH_MILLIS Since: API Level 8

The minimum length of an utterance. We will not stop recording before this amount of time. [...]

public static final String EXTRA_SPEECH_INPUT_POSSIBLY_COMPLETE_SILENCE_LENGTH_MILLIS

The amount of time that it should take after we stop hearing speech to consider the input possibly complete. [...]

Set the EXTRA_LANGUAGE_MODEL to websearch to capture only relevant words.