public static void SetTheme(CheckBox checkBox, FlatTheme theme, FlatUI.FlatFontFamily fontFamily, FlatUI.FlatFontWeight fontWeight, int radius, int size, int border) { // creating unchecked-enabled state drawable GradientDrawable uncheckedEnabled = new GradientDrawable(); uncheckedEnabled.SetCornerRadius(radius); uncheckedEnabled.SetSize(size, size); uncheckedEnabled.SetColor(Color.Transparent); uncheckedEnabled.SetStroke(border, theme.LightAccentColor); // creating checked-enabled state drawable GradientDrawable checkedOutside = new GradientDrawable(); checkedOutside.SetCornerRadius(radius); checkedOutside.SetSize(size, size); checkedOutside.SetColor(Color.Transparent); checkedOutside.SetStroke(border, theme.LightAccentColor); PaintDrawable checkedCore = new PaintDrawable(theme.LightAccentColor); checkedCore.SetCornerRadius(radius); checkedCore.SetIntrinsicHeight(size); checkedCore.SetIntrinsicWidth(size); InsetDrawable checkedInside = new InsetDrawable(checkedCore, border + 2, border + 2, border + 2, border + 2); Drawable[] checkedEnabledDrawable = {checkedOutside, checkedInside}; LayerDrawable checkedEnabled = new LayerDrawable(checkedEnabledDrawable); // creating unchecked-enabled state drawable GradientDrawable uncheckedDisabled = new GradientDrawable(); uncheckedDisabled.SetCornerRadius(radius); uncheckedDisabled.SetSize(size, size); uncheckedDisabled.SetColor(Color.Transparent); uncheckedDisabled.SetStroke(border, theme.VeryLightAccentColor); // creating checked-disabled state drawable GradientDrawable checkedOutsideDisabled = new GradientDrawable(); checkedOutsideDisabled.SetCornerRadius(radius); checkedOutsideDisabled.SetSize(size, size); checkedOutsideDisabled.SetColor(Color.Transparent); checkedOutsideDisabled.SetStroke(border, theme.VeryLightAccentColor); PaintDrawable checkedCoreDisabled = new PaintDrawable(theme.VeryLightAccentColor); checkedCoreDisabled.SetCornerRadius(radius); checkedCoreDisabled.SetIntrinsicHeight(size); checkedCoreDisabled.SetIntrinsicWidth(size); InsetDrawable checkedInsideDisabled = new InsetDrawable(checkedCoreDisabled, border + 2, border + 2, border + 2, border + 2); Drawable[] checkedDisabledDrawable = {checkedOutsideDisabled, checkedInsideDisabled}; LayerDrawable checkedDisabled = new LayerDrawable(checkedDisabledDrawable); StateListDrawable states = new StateListDrawable(); states.AddState(new int[]{-Android.Resource.Attribute.StateChecked, Android.Resource.Attribute.StateEnabled}, uncheckedEnabled); states.AddState(new int[]{Android.Resource.Attribute.StateChecked, Android.Resource.Attribute.StateEnabled}, checkedEnabled); states.AddState(new int[]{-Android.Resource.Attribute.StateChecked, -Android.Resource.Attribute.StateEnabled}, uncheckedDisabled); states.AddState(new int[]{Android.Resource.Attribute.StateChecked, -Android.Resource.Attribute.StateEnabled}, checkedDisabled); checkBox.SetButtonDrawable(states); // setting padding for avoiding text to be appear on icon checkBox.SetPadding(size / 4 * 5, 0, 0, 0); checkBox.SetTextColor(theme.LightAccentColor); var typeface = FlatUI.GetFont(checkBox.Context, fontFamily, fontWeight); if (typeface != null) checkBox.SetTypeface(typeface, TypefaceStyle.Normal); }