protected async override void OnNavigatedFrom(NavigationEventArgs e)
{
if (IsRecognizing)
{
Cancellation?.Cancel();
await SpeechRec?.StopRecognitionAsync();
}
else
{
Cancellation?.Dispose();
Cancellation = null;
}
AudioPlay.Stop();
AudioPlay.Source = null;
SpeechRec?.Dispose();
SpeechRec = null;
SpeechSynth?.Dispose();
SpeechSynth = null;
LoadTask = null;
StatusText.Visibility = Visibility.Collapsed;
ListeningDisplay.Visibility = Visibility.Collapsed;
}
private async void Ellipse_PointerPressed(object sender, PointerRoutedEventArgs e)
{
lock (SyncRootProvider.SyncRoot)
{
if (IsRecognizing)
{
return;
}
IsRecognizing = true;
}
AudioPlay.Stop();
StatusText.Visibility = Visibility.Collapsed;
ListeningDisplay.Visibility = Visibility.Visible;
string RecResult = await WindowsLocalRecognizeAsync();
if (RecResult == null)
{
IsRecognizing = false;
return;
}
if (RecResult == "Failure")
{
ListeningDisplay.Visibility = Visibility.Collapsed;
StatusText.Visibility = Visibility.Visible;
StatusText.Text = "麦克风未检测到声音输入";
}
else
{
ListeningDisplay.Visibility = Visibility.Collapsed;
StatusText.Visibility = Visibility.Visible;
StatusText.Text = RecResult;
}
SpeechSynthesisStream stream = await SpeechSynth.SynthesizeTextToStreamAsync(StatusText.Text);
AudioPlay.SetSource(stream, stream.ContentType);
AudioPlay.Play();
IsRecognizing = false;
}