how to detect TalkBack is active? using Xamarin Forms -Dependency service

Question

I will like to return true or false if TalkBack is active.

public bool IsVoiceOver() {

     AccessibilityManager am = (AccessibilityManager) 
     Context.AccessibilityService;

        var a =  am.IsEnabled;
        if (!a) 
        {
            Console.WriteLine(" DROID voice over   is : " + a);
            return false;
        }
        else 
        {
            Console.WriteLine("DROID voice over  is : " + a);
        return true;
        }
    }

However, "AccessibilityManager" is not working. I guess is a syntax issue not sure.

i have made changes in my answer take a look it should work now — FreakyAli, Feb 22 '19 at 20:27

FreakyAli · Answer 1 · 2019-02-22T20:33:13.143

1

What you can do is check with the AccessibilityManager if this is available or not

Something like below:

 AccessibilityManager am = (AccessibilityManager)GetSystemService(Context.AccessibilityService);

 if (am.IsEnabled) 
    {
        Console.WriteLine(" DROID voice over is active);
        return am.IsEnabled;
    }
    else 
    {
        Console.WriteLine("DROID voice over is inactive);
        return am.IsEnabled;
    }

do not forget to add the following using statements:

using Android.Views.Accessibility;
using Android.Content;

UPDATE

To access the GetSystemService method you will need the Current Activity Plugin

Install the NuGet package for it.
Simply call the Init method on OnCreate of your MainActivity CrossCurrentActivity.Current.Init(this, bundle);

Then you can call the GetSystemService Method as shown below:

  AccessibilityManager am = (AccessibilityManager)CrossCurrentActivity.Current.Activity.GetSystemService(Context.AccessibilityService);

edited Feb 22 '19 at 20:33

answered Feb 22 '19 at 14:57

FreakyAli

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Please see the screenshot on my original code. got an issue on GETSYSTEMSERVICE is this part of the os or is just a name of any other method? and the usings are included already. Thank you – Pxaml Feb 22 '19 at 16:26
1

You need activity reference for this you need to use it with current activity eg `Activity.GetSystemService()` – FreakyAli Feb 22 '19 at 18:25
You .got it !! Thank you so much – Pxaml Feb 23 '19 at 03:00
@Pxaml if this answers your question kindly mark it as correct – FreakyAli Feb 23 '19 at 05:03
G. hakim can you please take a look of this question https://stackoverflow.com/questions/55521746/how-to-find-if-user-has-enrolled-any-fingerprints?noredirect=1#comment97748133_55521746 – Pxaml Apr 04 '19 at 17:43

how to detect TalkBack is active? using Xamarin Forms -Dependency service

1 Answers1

UPDATE