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
You need to set the backgroundTintList or supportBackgroundTintList on the EditText to an instance of ColorStateList
ColorStateList colorStateList = ColorStateList.valueOf(color)
editText.setSupportBackgroundTintList(colorStateList)
OR
I think that if you want to change a bottom line color, then you can change using this below line
editText.getBackground().mutate().setColorFilter(getResources().getColor(R.color.your_color), PorterDuff.Mode.SRC_ATOP);
And Application theame like this:-
Please check this Example
Hope this Link1 Link2 helps you.