MRTK3's DictationExmple scene is broken. Need to disable keyword recognition before enabling dictation

[AMollis]

This issue has been migrated a new MRTK repository, and the status of this issue will now be tracked at the following location:

• MRTK3's DictationExmple scene is broken. Need to disable keyword recognition before enabling dictation MixedRealityToolkit/MixedRealityToolkit-Unity#63

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Overview

MRTK3's DictationExmple scene is broken. Need to disable keyword recognition before enabling dictation. See code in NonNativeKeyboard for a possible solution:

        /// <summary>
        /// Start dictation on a DictationSubsystem.
        /// </summary>
        public void StartDictation()
        {
            var dictationSubsystem = XRSubsystemHelpers.DictationSubsystem;
            if (dictationSubsystem != null && !isRecording)
            {
                isRecording = true;
                UpdateDictationRecordIconColor();

                keywordRecognitionSubsystem = XRSubsystemHelpers.KeywordRecognitionSubsystem;
                if (keywordRecognitionSubsystem != null)
                {
                    keywordRecognitionSubsystem.Stop();
                }

                ResetClosingTime();
                dictationSubsystem.Recognized += OnDictationRecognizedResult;
                dictationSubsystem.RecognitionFinished += OnDictationFinished;
                dictationSubsystem.RecognitionFaulted += OnDictationFaulted;
                dictationSubsystem.StartDictation();
            }
        }

        /// <summary>
        /// Called when dictation is completed
        /// </summary>
        /// <param name="eventData">Dictation event data</param>
        private void OnDictationFinished(DictationSessionEventArgs eventData)
        {
            HandleDictationShutdown();
        }

        /// <summary>
        /// Called when dictation is faulted
        /// </summary>
        /// <param name="eventData">Dictation event data</param>
        private void OnDictationFaulted(DictationSessionEventArgs eventData)
        {
            Debug.LogError("Dictation faulted. Reason: " + eventData.Reason);
            HandleDictationShutdown();
        }

        /// <summary>
        /// Release references to dictation events
        /// </summary>
        private void HandleDictationShutdown()
        {
            var dictationSubsystem = XRSubsystemHelpers.DictationSubsystem;
            if (dictationSubsystem != null)
            {
                dictationSubsystem.RecognitionFinished -= OnDictationFinished;
                dictationSubsystem.RecognitionFaulted -= OnDictationFaulted;
                dictationSubsystem.Recognized -= OnDictationRecognizedResult;

                isRecording = false;
                UpdateDictationRecordIconColor();
            }

            if (keywordRecognitionSubsystem != null)
            {
                keywordRecognitionSubsystem.Start();
                keywordRecognitionSubsystem = null;
            }
        }

Repo Steps

1. Build and deploy a UWP containing the DictationExample scene
2. Click the "start dictation" button
3. Nothing happens

[marlenaklein-msft]

Closed with #11696.