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100 changes: 100 additions & 0 deletions
100
samples/CommunityToolkit.Maui.Sample/Pages/Essentials/OfflineSpeechToTextPage.xaml
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|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| <?xml version="1.0" encoding="utf-8" ?> | ||
| <pages:BasePage xmlns="http://schemas.microsoft.com/dotnet/2021/maui" | ||
| xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml" | ||
| xmlns:pages="clr-namespace:CommunityToolkit.Maui.Sample.Pages" | ||
| x:Class="CommunityToolkit.Maui.Sample.Pages.Essentials.OfflineSpeechToTextPage" | ||
| xmlns:vm="clr-namespace:CommunityToolkit.Maui.Sample.ViewModels.Essentials" | ||
| xmlns:essentials="clr-namespace:CommunityToolkit.Maui.Sample.Pages.Essentials" | ||
| x:TypeArguments="vm:OfflineSpeechToTextViewModel" | ||
| x:DataType="vm:OfflineSpeechToTextViewModel" | ||
| Title="OfflineSpeechToText"> | ||
|
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| <ContentPage.Resources> | ||
| <essentials:PickerLocaleDisplayConverter x:Key="PickerLocaleDisplayConverter" /> | ||
| </ContentPage.Resources> | ||
|
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| <ScrollView> | ||
| <VerticalStackLayout | ||
| Spacing="20" | ||
| Padding="30,0"> | ||
|
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| <Label | ||
| Text="SpeechToText allows the user to convert speech to text in real time" | ||
| HorizontalTextAlignment="Center"/> | ||
|
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| <Label | ||
| Text="Locale" | ||
| FontAttributes="Bold"/> | ||
|
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| <Picker | ||
| ItemsSource="{Binding Locales}" | ||
| SelectedItem="{Binding CurrentLocale}" | ||
| ItemDisplayBinding="{Binding ., Converter={StaticResource PickerLocaleDisplayConverter}}"/> | ||
|
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| <Label | ||
| Text="State" | ||
| FontAttributes="Bold"/> | ||
|
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| <Label | ||
| Text="{Binding State}" | ||
| FontSize="18" | ||
| HorizontalOptions="Center" | ||
| HorizontalTextAlignment="Center" | ||
| MinimumHeightRequest="100" /> | ||
|
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| <Label | ||
| Text="Language Output" | ||
| FontAttributes="Bold"/> | ||
|
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| <Label | ||
| Text="{Binding RecognitionText}" | ||
| FontSize="18" | ||
| HorizontalOptions="Center" | ||
| HorizontalTextAlignment="Center" | ||
| MinimumHeightRequest="100" /> | ||
|
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| <Button | ||
| Text="Play" | ||
| Command="{Binding PlayCommand}" | ||
| HorizontalOptions="Center" /> | ||
|
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| <Border | ||
| StrokeThickness="2" | ||
| Stroke="#808080" | ||
| StrokeShape="RoundRectangle 8,8,8,8" | ||
| Padding="12"> | ||
| <Border.Content> | ||
| <Grid RowDefinitions="*,60" | ||
| ColumnDefinitions="*,*" | ||
| RowSpacing="12" | ||
| ColumnSpacing="12"> | ||
|
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| <Button | ||
| Grid.Row="0" | ||
| Grid.Column="0" | ||
| Text="StartListenAsync" | ||
| Command="{Binding StartListenCommand}" | ||
| HorizontalOptions="End" /> | ||
|
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| <Button | ||
| Grid.Row="0" | ||
| Grid.Column="1" | ||
| Text="StopListenAsync" | ||
| Command="{Binding StopListenCommand}" | ||
| HorizontalOptions="Start" /> | ||
|
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| <Label | ||
| Grid.Row="1" | ||
| Grid.ColumnSpan="2" | ||
| Text="The `StartListenAsync` API starts the speech-to-text service and shares the results using `RecognitionResultUpdated` event and `RecognitionResultCompleted` event." | ||
| HorizontalOptions="Center" | ||
| HorizontalTextAlignment="Center" | ||
| FontSize="12"/> | ||
|
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| </Grid> | ||
| </Border.Content> | ||
| </Border> | ||
| </VerticalStackLayout> | ||
| </ScrollView> | ||
|
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| </pages:BasePage> |
20 changes: 20 additions & 0 deletions
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samples/CommunityToolkit.Maui.Sample/Pages/Essentials/OfflineSpeechToTextPage.xaml.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| using System.Globalization; | ||
| using CommunityToolkit.Maui.Converters; | ||
| using CommunityToolkit.Maui.Sample.ViewModels.Essentials; | ||
|
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| namespace CommunityToolkit.Maui.Sample.Pages.Essentials; | ||
|
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| public partial class OfflineSpeechToTextPage : BasePage<OfflineSpeechToTextViewModel> | ||
| { | ||
| public OfflineSpeechToTextPage(OfflineSpeechToTextViewModel viewModel) : base(viewModel) | ||
| { | ||
| InitializeComponent(); | ||
| } | ||
|
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| protected override async void OnAppearing() | ||
| { | ||
| base.OnAppearing(); | ||
|
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| await BindingContext.SetLocalesCommand.ExecuteAsync(null); | ||
| } | ||
| } |
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150 changes: 150 additions & 0 deletions
150
samples/CommunityToolkit.Maui.Sample/ViewModels/Essentials/OfflineSpeechToTextViewModel.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| using System.Collections.ObjectModel; | ||
| using System.Collections.Specialized; | ||
| using System.Globalization; | ||
| using CommunityToolkit.Maui.Alerts; | ||
| using CommunityToolkit.Maui.Media; | ||
| using CommunityToolkit.Mvvm.ComponentModel; | ||
| using CommunityToolkit.Mvvm.Input; | ||
|
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| namespace CommunityToolkit.Maui.Sample.ViewModels.Essentials; | ||
|
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| public partial class OfflineSpeechToTextViewModel : BaseViewModel | ||
| { | ||
| const string defaultLanguage = "en-US"; | ||
| const string defaultLanguage_android = "en"; | ||
| const string defaultLanguage_tizen = "en_US"; | ||
|
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| readonly ITextToSpeech textToSpeech; | ||
| readonly ISpeechToText speechToText; | ||
|
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| [ObservableProperty] | ||
| Locale? currentLocale; | ||
|
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| public SpeechToTextState? State => speechToText.CurrentState; | ||
|
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| [ObservableProperty] | ||
| string? recognitionText = "Welcome to .NET MAUI Community Toolkit!"; | ||
|
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| [ObservableProperty, NotifyCanExecuteChangedFor(nameof(StartListenCommand))] | ||
| bool canStartListenExecute = true; | ||
|
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| [ObservableProperty, NotifyCanExecuteChangedFor(nameof(StopListenCommand))] | ||
| bool canStopListenExecute = false; | ||
|
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| public OfflineSpeechToTextViewModel(ITextToSpeech textToSpeech) | ||
| { | ||
| this.textToSpeech = textToSpeech; | ||
| this.speechToText = OfflineSpeechToText.Default; | ||
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| Locales.CollectionChanged += HandleLocalesCollectionChanged; | ||
| this.speechToText.StateChanged += HandleSpeechToTextStateChanged; | ||
| this.speechToText.RecognitionResultCompleted += HandleRecognitionResultCompleted; | ||
| } | ||
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| public ObservableCollection<Locale> Locales { get; } = []; | ||
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| [RelayCommand] | ||
| async Task SetLocales(CancellationToken token) | ||
| { | ||
| Locales.Clear(); | ||
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| var locales = await textToSpeech.GetLocalesAsync().WaitAsync(token); | ||
|
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| foreach (var locale in locales.OrderBy(x => x.Language).ThenBy(x => x.Name)) | ||
| { | ||
| Locales.Add(locale); | ||
| } | ||
|
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| CurrentLocale = Locales.FirstOrDefault(x => x.Language is defaultLanguage or defaultLanguage_android or defaultLanguage_tizen) ?? Locales.FirstOrDefault(); | ||
| } | ||
|
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| [RelayCommand] | ||
| async Task Play(CancellationToken cancellationToken) | ||
| { | ||
| var timeoutCancellationTokenSource = new CancellationTokenSource(TimeSpan.FromSeconds(5)); | ||
|
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| try | ||
| { | ||
| await textToSpeech.SpeakAsync(RecognitionText ?? "Welcome to .NET MAUI Community Toolkit!", new() | ||
| { | ||
| Locale = CurrentLocale, | ||
| Pitch = 1, | ||
| Volume = 1 | ||
| }, cancellationToken).WaitAsync(timeoutCancellationTokenSource.Token); | ||
| } | ||
| catch (TaskCanceledException) | ||
| { | ||
| await Toast.Make("Playback automatically stopped after 5 seconds").Show(cancellationToken); | ||
| #if IOS | ||
| await Toast.Make("If you did not hear playback, test again on a physical iOS device").Show(cancellationToken); | ||
| #endif | ||
| } | ||
| } | ||
|
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| [RelayCommand(CanExecute = nameof(CanStartListenExecute))] | ||
| async Task StartListen() | ||
| { | ||
| CanStartListenExecute = false; | ||
|
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| var isGranted = await speechToText.RequestPermissions(CancellationToken.None); | ||
| if (!isGranted) | ||
| { | ||
| await Toast.Make("Permission not granted").Show(CancellationToken.None); | ||
| return; | ||
| } | ||
|
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| if (Connectivity.NetworkAccess != NetworkAccess.Internet) | ||
| { | ||
| await Toast.Make("Internet connection is required").Show(CancellationToken.None); | ||
| return; | ||
| } | ||
|
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| const string beginSpeakingPrompt = "Begin speaking..."; | ||
|
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| RecognitionText = beginSpeakingPrompt; | ||
|
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| speechToText.RecognitionResultUpdated += HandleRecognitionResultUpdated; | ||
|
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| await speechToText.StartListenAsync(new SpeechToTextOptions() | ||
| { | ||
| Culture = CultureInfo.GetCultureInfo(CurrentLocale?.Language ?? defaultLanguage), | ||
| ShouldReportPartialResults = true | ||
| }, CancellationToken.None); | ||
|
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| if (RecognitionText is beginSpeakingPrompt) | ||
| { | ||
| RecognitionText = string.Empty; | ||
| } | ||
| } | ||
|
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| [RelayCommand(CanExecute = nameof(CanStopListenExecute))] | ||
| Task StopListen() | ||
| { | ||
| CanStartListenExecute = true; | ||
| CanStopListenExecute = false; | ||
|
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| speechToText.RecognitionResultUpdated -= HandleRecognitionResultUpdated; | ||
|
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| return speechToText.StopListenAsync(CancellationToken.None); | ||
| } | ||
|
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| void HandleRecognitionResultUpdated(object? sender, SpeechToTextRecognitionResultUpdatedEventArgs e) | ||
| { | ||
| RecognitionText += e.RecognitionResult; | ||
| } | ||
|
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| void HandleRecognitionResultCompleted(object? sender, SpeechToTextRecognitionResultCompletedEventArgs e) | ||
| { | ||
| RecognitionText = e.RecognitionResult.IsSuccessful ? e.RecognitionResult.Text : e.RecognitionResult.Exception.Message; | ||
| } | ||
|
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| void HandleSpeechToTextStateChanged(object? sender, SpeechToTextStateChangedEventArgs e) | ||
| { | ||
| OnPropertyChanged(nameof(State)); | ||
| } | ||
|
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| void HandleLocalesCollectionChanged(object? sender, NotifyCollectionChangedEventArgs e) | ||
| { | ||
| OnPropertyChanged(nameof(CurrentLocale)); | ||
| } | ||
| } |
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