Xamarin.Forms: Change Icon & Text size in TabbedPage tabs

Question

I am developing Tabs using TabbedPage in xaml. The default tabs Icons & Text size is big so I need to reduce the size of Icons & Text.

Answer 1

After some effort i get it work for android using TabbedPageRenderer. Created custom layout with ImageView & TetxtView below Custom_tab_layou.xaml

Created MyTabbedPageRenderer class

    public class MyTabbedPageRenderer : TabbedPageRenderer
    {
        private Dictionary icons = new Dictionary();
        bool setup;
        ViewPager pager;
        TabLayout layout;
        public MyTabbedPageRenderer(Context context) : base(context)
        {
        }

        protected override void SetTabIcon(TabLayout.Tab tab, FileImageSource icon)
        {
            base.SetTabIcon(tab, icon);
            tab.SetCustomView(Resource.Layout.Custom_tab_layou);

            var imageview = tab.CustomView.FindViewById(Resource.Id.icon);
            var tv = tab.CustomView.FindViewById(Resource.Id.tv);

            tv.SetText(tab.Text, TextView.BufferType.Normal);
            imageview.SetBackgroundDrawable(tab.Icon);

            ColorStateList colors2 = null;

            if ((int)Build.VERSION.SdkInt >= 23)
                colors2 = Resources.GetColorStateList(Resource.Color.icon_tab, Forms.Context.Theme);
            else
                colors2 = Resources.GetColorStateList(Resource.Color.icon_tab);
            tv.SetTextColor(colors2);
        }

        //this is for changing text color of select tab
        protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            base.OnElementPropertyChanged(sender, e);
            if (setup)
                return;
            if (e.PropertyName == "Renderer")
            {
                pager = (ViewPager)ViewGroup.GetChildAt(0);
                layout = (TabLayout)ViewGroup.GetChildAt(1);
                setup = true;
                ColorStateList colors = null;

                if ((int)Build.VERSION.SdkInt >= 23)
                    colors = Resources.GetColorStateList(Resource.Color.icon_tab, Forms.Context.Theme);
                else
                    colors = Resources.GetColorStateList(Resource.Color.icon_tab);

                for (int i = 0; i < layout.TabCount; i++)
                {
                    var tab = layout.GetTabAt(i);
                    var icon = tab.Icon;

                    Android.Views.View view = GetChildAt(i);
                    if (view is TabLayout) layout = (TabLayout)view;

                    if (icon != null)
                    {
                        icon = Android.Support.V4.Graphics.Drawable.DrawableCompat.Wrap(icon);
                        Android.Support.V4.Graphics.Drawable.DrawableCompat.SetTintList(icon, colors);
                    }
                }
            }
        }
  }