Essentials: Failed to initialize Text to Speech engine. Exception.

[Sergiojoel9877]

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Description

Failed to initialize Text to Speech engine. Exception.

Steps to Reproduce

1. Upgrade Xamarin.Essentials to the latest prerelease 0.11.0-preview.

Expected Behavior

Actual Behavior

Basic Information

• Version with issue: 0.11.0-preview
• Last known good version: None of them seems to work on Android 9.0
• IDE: Visual Studio
• Platform Target Frameworks: 28.0.0-preview 8
  
  
  
  • iOS:
  
  
  • Android: 9.0
  
  
  • UWP:
  
  
• Android Support Library Version:
• Nuget Packages: Xamarin.Essentials-v0.11.0-preview.
• Affected Devices:

Screenshots

Reproduction Link

[Redth]

Unable to reproduce this locally.

Can you provide a simple reproducible solution for us?

[jamesmontemagno]

Additionally, where are you calling the code?

[Sergiojoel9877]

Hey guys, here is a reproducible solution.
https://github.com/Sergiojoel9877/XE.git
It uses the latest Xamarin Essentials nugget, XamarinForms 3.4.0, and the latest Android Support Libraries 28.0.0.0-preview8
@jamesmontemagno no matter the place [Code Behind, ViewModel], it always gives me that exception.

[jamesmontemagno]

I believe your issue is that you are trying to call the speak code on a background task:

 Task.Factory.StartNew(async ()=>
            {

It has to be initialized on the UI thread. Remove this code and should be good.

[jamesmontemagno]

This is not a supported scenario because TTS must be initialized and run on the UI Thread.

You can use:

SpeakAsync().ContinueWith((t)=>{});

[Sergiojoel9877]

Just after updating to the 1.0.0 version it got solved. Thanks guys.