android - 我可以让语音识别器无限期地收听吗？

Question

当我调用 SpeechRecognizer 对象的 startListening 方法时，语音识别器开始监听语音。我想创建一个等待特定关键字语音的服务:当用户说出这个关键字并且语音识别器检测到这个关键字时，服务就准备好接收用户语音命令。

为此，在一个新的 SpeechRecognizer 实例化后，我应该调用它的 startListening 方法:我可以让语音识别器无限期地听吗？

Answer 1

Android 语音识别器 可以通过 Intent 额外数据进行自定义。见 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. [...]

设置EXTRA_LANGUAGE_MODEL到网络搜索以仅捕获相关词。