public override void NavigatedTo()
{
// Why? Given usage ChildFragmentManager not to pollute activity's FragmentManager we have to
// apply new ChildFragmentManager when navigating or else the old one would be retained while it has
// been already detached by Android. Hence code below essentially recreates Pager state with never manager.
if (_adapter != null)
{
var selectedPage =
_lastSelectedFragment != null && _adapter.Fragments.Contains(_lastSelectedFragment)
? _adapter.Fragments.IndexOf(_lastSelectedFragment)
: 0;
_adapter = _adapter.Duplicate(ChildFragmentManager);
ViewPager.Adapter = _adapter;
ViewPager.SetCurrentItem(selectedPage, false);
UpdateTabIcons();
}
base.NavigatedTo();
ViewModel.NavigatedTo();
}
protected override void InitBindings()
{
if (ViewModel is null)
{
Resolve <Logger <FeedPageFragment> >().LogError("No ViewModel on InitBindings.");
Debugger.Break();
}
Bindings.Add(this.SetBinding(() => ViewModel.FeedTabEntries).WhenSourceChanges(() =>
{
if (ViewModel.FeedTabEntries is null)
{
return;
}
_adapter = new FeedPagerAdapter(ChildFragmentManager, ViewModel.FeedTabEntries, this);
ViewPager.Adapter = _adapter;
UpdateTabIcons();
}));
Bindings.Add(this.SetBinding(() => ViewModel.JumpToButtonVisibility).WhenSourceChanges(() =>
{
if (ViewModel.JumpToButtonVisibility)
{
JumpToButton.Show();
}
else
{
JumpToButton.Hide();
}
}));
JumpToButton.SetOnClickListener(new OnClickListener(HandleJumpToPopup));
TabStrip.SetupWithViewPager(ViewPager);
ViewPager.PageSelected += ViewPagerOnPageSelected;
}
