How to consistently set EditText Selected Underline Color Programmatically

Question

I\'m trying to build a renderer for Xamarin Forms. The renderer needs to set the EditText underline color to \"Active Color\" when selected and \"Hint Color\" when

Answer 1

So the solution for me was to go pure AppCompat

So I'm adding an AppCompatEditText to the TextInputLayout

protected EditText EditText => Control.EditText;

protected override TextInputLayout CreateNativeControl()
{
    var textInputLayout = new TextInputLayout(Context);
    var editText = new AppCompatEditText(Context)
    {
        SupportBackgroundTintList = ColorStateList.ValueOf(GetPlaceholderColor())
    };
    textInputLayout.AddView(editText);
    return textInputLayout;
}

Then from there I was able to set the underline consistently with this.

private void ControlOnFocusChange(object sender, FocusChangeEventArgs args)
{
    _hasFocus = args.HasFocus;
    SetUnderlineColor(_hasFocus ?  GetActivePlaceholderColor(): GetPlaceholderColor());
} 

private void SetUnderlineColor(AColor color)
{
    var element = (ITintableBackgroundView)EditText;
    element.SupportBackgroundTintList = ColorStateList.ValueOf(color);
}

full source code here.