android - 如何防止Android SpeechRecognizer被破坏后发出声音？

Question

我正在使用 android.speech.SpeechRecognizer 我有一个问题，即使在我调用它之后它也会发出独特的 clang stopListening() , cancel() , 和 destroy()方法。

下面是我如何创建和销毁 SpeechRecognizer在 MainActivity.kt .

private fun startSpeechRecognition() {
    Log.e(TAG, "At start of startSpeechRecognition()")
    if (recognizer == null) {
        recognizer = SpeechRecognizer.createSpeechRecognizer(this)
        Log.e(TAG, "Creating new recognizer: $recognizer")
        recognizer?.setRecognitionListener(Listener())
    }
    val intent = Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH)
    intent.putExtra(
        RecognizerIntent.EXTRA_LANGUAGE_MODEL,
        RecognizerIntent.LANGUAGE_MODEL_FREE_FORM
    )
    Log.e(TAG, "Starting listening")
    recognizer?.startListening(intent)
}

private fun closeRecognizer() {
    Log.e(TAG, "At start of closeRecognizer()")
    recognizer?.run {
        Log.e(TAG, "Stopping recognizer: $this")
        stopListening()
        cancel()
        destroy()
        recognizer = null
    } ?: Log.e(TAG, "Recognizer already null")
}

这是我的日志:

E/voice.assistan: Unknown bits set in runtime_flags: 0x8000
E/MainActivity: At start of closeRecognizer()
E/MainActivity: Recognizer already null
E/MainActivity: At start of startSpeechRecognition()
E/MainActivity: Creating new recognizer: android.speech.SpeechRecognizer@573d161
E/MainActivity: Starting listening
E/MainActivity: At start of closeRecognizer()
E/MainActivity: Stopping recognizer: android.speech.SpeechRecognizer@573d161
E/SpeechRecognizer: not connected to the recognition service
E/SpeechRecognizer: not connected to the recognition service
E/MainActivity: At start of closeRecognizer()
E/MainActivity: Recognizer already null

我正在运行 Android 10 的 Pixel 2 上测试代码并使用 minSdkVersion 进行编译21 和 targetSdkVersion 28.

谁能告诉我我可能做错了什么或者库中是否存在错误？

我目前有一个笨拙的解决方法，即在关闭识别器后将媒体音频流静音。

Answer 1

您确定需要调用 SpeechRecognizer.cancel() 吗？根据this调用 SpeechRecognizer.destroy() 可能就足够了。

另请注意日志中的未连接到识别服务 错误，表明 SpeechRecognizer 出现问题。您可以尝试移除 cancel() 的调用并检查错误是否消失。