通过"Ok Google"这样的短语开始语音识别？

Question

我正在构建一个使用语音命令执行某些功能的应用程序.我从这里得到了一些代码

private static final int SPEECH_REQUEST_CODE = 0;

// Create an intent that can start the Speech Recognizer activity
private void displaySpeechRecognizer() {
    Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
    intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
            RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
// Start the activity, the intent will be populated with the speech text
    startActivityForResult(intent, SPEECH_REQUEST_CODE);
}

// This callback is invoked when the Speech Recognizer returns.
// This is where you process the intent and extract the speech text from the intent.
@Override
protected void onActivityResult(int requestCode, int resultCode,
        Intent data) {
    if (requestCode == SPEECH_REQUEST_CODE && resultCode == RESULT_OK) {
        List<String> results = data.getStringArrayListExtra(
                RecognizerIntent.EXTRA_RESULTS);
        String spokenText = results.get(0);
        // Do something with spokenText
    }
    super.onActivityResult(requestCode, resultCode, data);
}

但是,需要通过单击按钮激活此方法.有没有办法通过语音命令启动语音识别器？就像Google现在你可以说"Ok Google"一样,它会打开Speech Recognizer活动并听取命令吗？

谢谢.

Answer 1

您将需要编写用于连续语音识别的服务。并根据语音获得的输入检测触发短语并采取行动。

这可能会占用大量内存，因此您需要通过在适当的时间和屏幕上启动和停止服务来进行优化。

对这个问题的公认答案为实现类似目的提供了一种手段。