public bool OnNavigationItemSelected(IMenuItem item)
{
if (Element == null || IsDisposed)
{
return(false);
}
var id = item.ItemId;
if (id == BottomNavigationViewUtils.MoreTabId)
{
var items = CreateTabList();
var bottomSheetDialog = BottomNavigationViewUtils.CreateMoreBottomSheet(OnMoreItemSelected, Element.FindMauiContext(), items, _bottomNavigationView.MaxItemCount);
bottomSheetDialog.DismissEvent += OnMoreSheetDismissed;
bottomSheetDialog.Show();
}
else
{
if (_bottomNavigationView.SelectedItemId != item.ItemId && Element.Children.Count > item.ItemId)
{
Element.CurrentPage = Element.Children[item.ItemId];
}
}
return(true);
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.layout_bottomnavigation);
mToolbar = FindViewById <Android.Support.V7.Widget.Toolbar>(Resource.Id.toolbar);
if (null != mToolbar)
{
SetSupportActionBar(mToolbar);
SupportActionBar.SetDisplayHomeAsUpEnabled(false);
SupportActionBar.SetHomeButtonEnabled(false);
}
mBottomNav = FindViewById <BottomNavigationView>(Resource.Id.bottom_navigation);
mBottomNav.NavigationItemSelected += OnNavigationItemSelected;
BottomNavigationViewUtils.SetShiftMode(mBottomNav, false, false);
mViewPager = FindViewById <ViewPager>(Resource.Id.viewpager);
var adapter = new ViewPagerAdapter(this.SupportFragmentManager);
var random = new Random();
adapter.AddFragment(new BottomNavFragment(random.Next(10, 20)));
adapter.AddFragment(new BottomNavFragment(random.Next(10, 30)));
adapter.AddFragment(new BottomNavFragment(random.Next(10, 40)));
adapter.AddFragment(new BottomNavFragment(random.Next(10, 50)));
mViewPager.Adapter = adapter;
mViewPager.PageSelected += OnViewPagerChanged;
mBottomNav.SelectedItemId = Resource.Id.one;
mToolbar.Title = GetText(Resource.String.one);
mViewPager.CurrentItem = 0;
}
bool NavigationBarView.IOnItemSelectedListener.OnNavigationItemSelected(IMenuItem item)
{
if (_tabbedPageManager.Element == null)
{
return(false);
}
var id = item.ItemId;
if (id == BottomNavigationViewUtils.MoreTabId)
{
var items = _tabbedPageManager.CreateTabList();
var bottomSheetDialog = BottomNavigationViewUtils.CreateMoreBottomSheet(_tabbedPageManager.OnMoreItemSelected, _tabbedPageManager.Element.FindMauiContext(), items, _tabbedPageManager._bottomNavigationView.MaxItemCount);
bottomSheetDialog.DismissEvent += _tabbedPageManager.OnMoreSheetDismissed;
bottomSheetDialog.Show();
}
else
{
if (_tabbedPageManager._bottomNavigationView.SelectedItemId != item.ItemId && _tabbedPageManager.Element.Children.Count > item.ItemId)
{
_tabbedPageManager.Element.CurrentPage = _tabbedPageManager.Element.Children[item.ItemId];
}
}
return(true);
}
protected virtual bool OnItemSelected(IMenuItem item)
{
var id = item.ItemId;
if (id == MoreTabId)
{
var items = CreateTabList(ShellItem);
_bottomSheetDialog = BottomNavigationViewUtils.CreateMoreBottomSheet(OnMoreItemSelected, MauiContext, items, _bottomView.MaxItemCount);
_bottomSheetDialog.Show();
_bottomSheetDialog.DismissEvent += OnMoreSheetDismissed;
}
else
{
var shellSection = ((IShellItemController)ShellItem).GetItems()[id];
if (item.IsChecked)
{
OnTabReselected(shellSection);
}
else
{
return(ChangeSection(shellSection));
}
}
return(true);
}
protected override void OnAttached()
{
if (!(Container.GetChildAt(0) is ViewGroup layout))
{
return;
}
if (!(layout.GetChildAt(1) is BottomNavigationView bottomNavigationView))
{
return;
}
// This is what we set to adjust if the shifting happens
BottomNavigationViewUtils.SetShiftMode(bottomNavigationView, false, false);
}
void SetupBottomNavigationView(NotifyCollectionChangedEventArgs e)
{
var currentIndex = Element.Children.IndexOf(Element.CurrentPage);
var items = CreateTabList();
BottomNavigationViewUtils.SetupMenu(
_bottomNavigationView.Menu,
_bottomNavigationView.MaxItemCount,
items,
currentIndex,
_bottomNavigationView,
Element.FindMauiContext());
if (Element.CurrentPage == null && Element.Children.Count > 0)
{
Element.CurrentPage = Element.Children[0];
}
}
protected virtual void SetupMenu(IMenu menu, int maxBottomItems, ShellItem shellItem)
{
if (DisplayedPage == null)
{
return;
}
if (ShellItemController.ShowTabs)
{
_menuSetup = true;
var currentIndex = ((IShellItemController)ShellItem).GetItems().IndexOf(ShellSection);
var items = CreateTabList(shellItem);
BottomNavigationViewUtils.SetupMenu(
menu,
maxBottomItems,
items,
currentIndex,
_bottomView,
MauiContext);
}
UpdateTabBarVisibility();
}
protected virtual Drawable CreateItemBackgroundDrawable()
{
return(BottomNavigationViewUtils.CreateItemBackgroundDrawable());
}
