protected override void OnLayout(bool changed, int l, int t, int r, int b)
{
int width = r - l;
int height = b - t;
var context = Context;
_bottomNavigationView.Measure(MeasureSpec.MakeMeasureSpec(width, MeasureSpecMode.Exactly), MeasureSpec.MakeMeasureSpec(height, MeasureSpecMode.AtMost));
int tabsHeight = Math.Min(height, Math.Max(_bottomNavigationView.MeasuredHeight, _bottomNavigationView.MinimumHeight));
if (width > 0 && height > 0)
{
_pageController.ContainerArea = new Rectangle(0, 0, context.FromPixels(width), context.FromPixels(_frameLayout.Height));
ObservableCollection <Element> internalChildren = _pageController.InternalChildren;
for (var i = 0; i < internalChildren.Count; i++)
{
var child = internalChildren[i] as VisualElement;
if (child == null)
{
continue;
}
NavigationPageRenderer navigationRenderer;
using (IVisualElementRenderer renderer = Platform.Android.Platform.GetRenderer(child))
{
navigationRenderer = renderer as NavigationPageRenderer;
}
if (navigationRenderer != null)
{
// navigationRenderer.ContainerPadding = tabsHeight;
}
}
_bottomNavigationView.Measure(MeasureSpec.MakeMeasureSpec(width, MeasureSpecMode.Exactly), MeasureSpec.MakeMeasureSpec(tabsHeight, MeasureSpecMode.Exactly));
_bottomNavigationView.Layout(0, 0, width, tabsHeight);
}
base.OnLayout(changed, l, t, r, b);
}
private void SetupLargeTab()
{
var tabBar = (CustomTabBar)ShellItem;
bottomView.Measure((int)MeasureSpecMode.Unspecified, (int)MeasureSpecMode.Unspecified);
outerlayout.Measure((int)MeasureSpecMode.Unspecified, (int)MeasureSpecMode.Unspecified);
shellOverlay.RemoveAllViews();
shellOverlay.AddView(ConvertFormsToNative(tabBar.TabBarView,
new Xamarin.Forms.Rectangle(0, 0, Xamarin.Essentials.DeviceDisplay.MainDisplayInfo.Width / Xamarin.Essentials.DeviceDisplay.MainDisplayInfo.Density, (double)bottomView?.MeasuredHeight / Xamarin.Essentials.DeviceDisplay.MainDisplayInfo.Density)));
// If I do not hide navigation bar, I have to use Resources.DisplayMetrics.WidthPixels (instead of DeviceDisplay.MainDisplayInfo.Width) because I want the width of the screen without the height of the navigation bar.
}
private async void SetupLargeTab()
{
var todoTabBar = (TodoTabBar)ShellItem;
var layout = new FrameLayout(Context);
var imageHandler = todoTabBar.LargeTab.Icon.GetHandler();
Bitmap bitmap = await imageHandler.LoadImageAsync(todoTabBar.LargeTab.Icon, Context);
var image = new ImageView(Context);
image.SetImageBitmap(bitmap);
layout.AddView(image);
var lp = new FrameLayout.LayoutParams(300, 300);
_bottomView.Measure((int)MeasureSpecMode.Unspecified, (int)MeasureSpecMode.Unspecified);
lp.BottomMargin = _bottomView.MeasuredHeight / 2;
layout.LayoutParameters = lp;
_shellOverlay.RemoveAllViews();
_shellOverlay.AddView(layout);
}
