protected virtual void SetColors(TabLayout tabLayout, Color foreground, Color background, Color title, Color unselected)
{
var titleArgb = title.ToPlatform(ShellRenderer.DefaultTitleColor).ToArgb();
var unselectedArgb = unselected.ToPlatform(ShellRenderer.DefaultUnselectedColor).ToArgb();
tabLayout.SetTabTextColors(unselectedArgb, titleArgb);
tabLayout.SetBackground(new ColorDrawable(background.ToPlatform(ShellRenderer.DefaultBackgroundColor)));
tabLayout.SetSelectedTabIndicatorColor(foreground.ToPlatform(ShellRenderer.DefaultForegroundColor));
}
void UpdateBarBackgroundColor()
{
if (_disposed || _tabLayout == null)
{
return;
}
Color tintColor = Element.BarBackgroundColor;
if (Forms.IsLollipopOrNewer)
{
if (tintColor.IsDefault)
{
_tabLayout.BackgroundTintMode = null;
}
else
{
_tabLayout.BackgroundTintMode = PorterDuff.Mode.Src;
_tabLayout.BackgroundTintList = ColorStateList.ValueOf(tintColor.ToAndroid());
}
}
else
{
if (tintColor.IsDefault && _backgroundDrawable != null)
{
_tabLayout.SetBackground(_backgroundDrawable);
}
else if (!tintColor.IsDefault)
{
if (_backgroundDrawable == null)
{
_backgroundDrawable = _tabLayout.Background;
}
_tabLayout.SetBackgroundColor(tintColor.ToAndroid());
}
}
}
void UpdateBarBackgroundColor()
{
if (IsDisposed)
{
return;
}
if (IsBottomTabPlacement)
{
Color tintColor = Element.BarBackgroundColor;
if (tintColor.IsDefault)
{
_bottomNavigationView.SetBackground(null);
}
else if (!tintColor.IsDefault)
{
_bottomNavigationView.SetBackgroundColor(tintColor.ToAndroid());
}
}
else
{
Color tintColor = Element.BarBackgroundColor;
if (Forms.IsLollipopOrNewer)
{
if (tintColor.IsDefault)
{
_tabLayout.BackgroundTintMode = null;
}
else
{
_tabLayout.BackgroundTintMode = PorterDuff.Mode.Src;
_tabLayout.BackgroundTintList = ColorStateList.ValueOf(tintColor.ToAndroid());
}
}
else
{
if (tintColor.IsDefault && _backgroundDrawable != null)
{
_tabLayout.SetBackground(_backgroundDrawable);
}
else if (!tintColor.IsDefault)
{
// if you don't create a new drawable then SetBackgroundColor
// just sets the color on the background drawable that's saved
// it doesn't create a new one
if (_backgroundDrawable == null && _tabLayout.Background != null)
{
_backgroundDrawable = _tabLayout.Background;
_wrappedBackgroundDrawable = ADrawableCompat.Wrap(_tabLayout.Background).Mutate();
}
if (_wrappedBackgroundDrawable != null)
{
_tabLayout.Background = _wrappedBackgroundDrawable;
}
_tabLayout.SetBackgroundColor(tintColor.ToAndroid());
}
}
}
}
protected override void OnElementChanged(ElementChangedEventArgs <TabbedPage> e)
{
base.OnElementChanged(e);
if (e.NewElement == null)
{
return;
}
SetGradientBackground();
var relativeLayout = this.GetChildAt(0) as Android.Widget.RelativeLayout;
if (relativeLayout == null)
{
tabLayout = FindViewById <TabLayout>(Resource.Id.sliding_tabs);
tabLayout.SetBackground(gradientDrawable);
}
else
{
ColorStateList iconsColorStates = new ColorStateList(
new int[][] {
new int[] { -Android.Resource.Attribute.StateChecked },
new int[] { Android.Resource.Attribute.StateChecked }
},
new int[] {
Android.Graphics.Color.AliceBlue,
Android.Graphics.Color.White
});
ColorStateList textColorStates = new ColorStateList(
new int[][] {
new int[] { -Android.Resource.Attribute.StateChecked },
new int[] { Android.Resource.Attribute.StateChecked }
},
new int[] {
Android.Graphics.Color.AliceBlue,
Android.Graphics.Color.White
});
bottomNavigationView = relativeLayout.GetChildAt(1) as BottomNavigationView;
// --> Individually resize Tab bar icons on BottomNavigationView:
//var bottomNavigationMenuView = (BottomNavigationMenuView)bottomNavigationView.GetChildAt(0);
//var scale = Resources.DisplayMetrics.Density;
//var paddingDp = 4;
//var dpAsPixels = (int)(paddingDp * scale + 0.5f);
//for (int i = 0; i < bottomNavigationMenuView.ChildCount; i++)
//{
// var childView = bottomNavigationMenuView.GetChildAt(i);
// var iconView = bottomNavigationMenuView.GetChildAt(i).FindViewById(Resource.Id.icon);
// var layoutParams = iconView.LayoutParameters;
// var displayMetrics = Resources.DisplayMetrics;
// // --> If it is special menu item change the size, otherwise take other size:
// if (i == 1)
// {
// // --> Set Padding individually:
// //if (childView is BottomNavigationItemView tab)
// //{
// // // --> Set Padding here:
// // tab.SetPadding(tab.PaddingLeft, dpAsPixels, tab.PaddingRight, tab.PaddingBottom);
// //}
// // --> Set height here:
// layoutParams.Height = (int)TypedValue.ApplyDimension(ComplexUnitType.Dip, 32, displayMetrics);
// // --> Set width here:
// layoutParams.Width = (int)TypedValue.ApplyDimension(ComplexUnitType.Dip, 48, displayMetrics);
// }
// else if (i == 2)
// {
// // --> Set Padding individually:
// //if (childView is BottomNavigationItemView tab)
// //{
// // // --> Set Padding here:
// // tab.SetPadding(tab.PaddingLeft, dpAsPixels, tab.PaddingRight, tab.PaddingBottom);
// //}
// // --> Set height here:
// layoutParams.Height = (int)TypedValue.ApplyDimension(ComplexUnitType.Dip, 24, displayMetrics);
// // --> Set width here:
// layoutParams.Width = (int)TypedValue.ApplyDimension(ComplexUnitType.Dip, 24, displayMetrics);
// }
// else
// {
// // --> Set Padding individually:
// //if (childView is BottomNavigationItemView tab)
// //{
// // // --> Set Padding here:
// // tab.SetPadding(tab.PaddingLeft, dpAsPixels, tab.PaddingRight, tab.PaddingBottom);
// //}
// // --> Set height here:
// layoutParams.Height = (int)TypedValue.ApplyDimension(ComplexUnitType.Dip, 28, displayMetrics);
// // --> Set width here:
// layoutParams.Width = (int)TypedValue.ApplyDimension(ComplexUnitType.Dip, 28, displayMetrics);
// }
// iconView.LayoutParameters = layoutParams;
//}
// --> Resize all Tab bar icons equally on BottomNavigationView:
//bottomNavigationView.ItemIconSize = (int)TypedValue.ApplyDimension(ComplexUnitType.Dip, 80, Resources.DisplayMetrics);
bottomNavigationView.ItemIconTintList = iconsColorStates;
bottomNavigationView.ItemTextColor = textColorStates;
// --> Set Padding for all icons equally:
bottomNavigationView.SetPadding(0, 15, 0, 0);
bottomNavigationView.SetBackground(gradientDrawable);
bottomNavigationView.Elevation = 0;
}
}