How to set font scale in my own android application?

Question

I want to allow user select font size.

Spare Parts do provide the feature to do that,

ActivityManagerNative.getDefault().updateConfiguratio

Answer 1

Translated for Xamarin....

        Android.Content.Res.Configuration configuration = Resources.Configuration;
        configuration.FontScale = (float)1; //0.85 small size, 1 normal size, 1,15 big etc

        Android.Util.DisplayMetrics metrics = new DisplayMetrics();
        this.WindowManager.DefaultDisplay.GetMetrics(metrics);
        metrics.ScaledDensity = configuration.FontScale * metrics.Density;