C# ContinuousRecognitionSession.StartAsync（）返回“访问被拒绝”

我尝试使用BackgroundApplication在Raspberry PI 3中实现语音识别器。我正在使用UWP中的SpeechRecognitor类

调用此函数ContinuousRecognitionSession.StartAsync时出现此错误“访问被拒绝”

有什么问题

代码是：

class Speech
{
    private static SpeechRecognizer speechRecognizer;
    public async static void Initialize()
    {
        speechRecognizer = new SpeechRecognizer();
        speechRecognizer.Constraints.Add(new SpeechRecognitionListConstraint(new List<String>() { "Hello" }, "Hello"));

        SpeechRecognitionCompilationResult compilationResult = await speechRecognizer.CompileConstraintsAsync();

        speechRecognizer.ContinuousRecognitionSession.ResultGenerated += ContinuousRecognitionSession_ResultGenerated;
    }

    private static void ContinuousRecognitionSession_ResultGenerated(SpeechContinuousRecognitionSession sender, SpeechContinuousRecognitionResultGeneratedEventArgs args)
    {
        throw new NotImplementedException();
    }

    public static async Task<bool> StartRecognition()
    {
        try
        {
            await speechRecognizer.ContinuousRecognitionSession.StartAsync();
        }
        catch (Exception eException)
        {
            return false;
        }

        return true;
    }
}

---

正如@Tóth Tibor指出的，您需要在Package.appxmanifest中声明麦克风功能，如下所示：

  <Capabilities>
    <DeviceCapability Name="microphone" />
  </Capabilities>

---

有关更多信息，请参考。

您是否在package.appxmanifest中添加了麦克风功能？

  <Capabilities>
    <DeviceCapability Name="microphone" />
  </Capabilities>