How to play text to speech using xamarin.essential - forms

Question

I want to play text to speech but I can't hear anything using Xamarin.essential. I 'm sure I don't have muted smartphone. The code:
using Xamarin.Essential
private void PlayTextMethod()
{
if(do sth)
{
SpeekFrommethodAsync();
}
}
private async SpeekFrommethodAsync()
{
await TextToSpeech.SpeakAsync(Tasklabel.Text, new SpeechOptions
{
Volume = 1f
});
}

Answer 1

If your project's Target Android version is set to Android 11 (R API 30),
Open the AndroidManifest.xml file under the Properties folder and add the following inside of the manifest node:
<queries>
<intent>
<action android:name="android.intent.action.TTS_SERVICE" />
</intent>
</queries>
And try this in your method:
public async Task SpeakNow()
{
var locales = await TextToSpeech.GetLocalesAsync();
// Grab the first locale
var locale = locales.FirstOrDefault();
var settings = new SpeechOptions()
{
Volume = .75f,
Pitch = 1.0f,
Locale = locale
};
await TextToSpeech.SpeakAsync("Hello World", settings);
}
Refer: https://learn.microsoft.com/en-us/xamarin/essentials/text-to-speech?context=xamarin%2Fandroid&tabs=android

Answer 2

I made a demo and I tested it on the Android 12 emulator. I found the Text-to-speech function can not speak the words which belong to another country. So I added a picker to choose the country.
Here is the code in MainPage.xaml
<StackLayout>
<Frame BackgroundColor="#2196F3" Padding="24" CornerRadius="0">
<Label Text="Text to speech sample!" HorizontalTextAlignment="Center" TextColor="White" FontSize="36"/>
</Frame>
<Picker x:Name="Languages"></Picker>
<Entry x:Name="TextToSpeak"></Entry>
<Button Text="Speak Please" Clicked="Button_Clicked"></Button>
</StackLayout>
And here is the code in MainPage.xaml.cs.
using Xamarin.Essentials;
public partial class MainPage : ContentPage
{
IEnumerable<Locale> locales;
public MainPage()
{
InitializeComponent();
}
protected async override void OnAppearing()
{
base.OnAppearing();
locales = await TextToSpeech.GetLocalesAsync();
// add the locales to the picker
foreach(var locale in locales)
{
Languages.Items.Add(locale.Name);
}
}
// realize the button
private void Button_Clicked(object sender, EventArgs e)
{
if(Languages.SelectedIndex > 0)
{
// use the TextToSpeech to read the words in the Entry.
TextToSpeech.SpeakAsync(TextToSpeak.Text, new SpeechOptions
{
Locale = locales.Single(locales=> locales.Name == Languages.SelectedItem.ToString())
});
}
}
}
This is the view of the project.