protected void Show(MvxFragment fragment, bool backStack)
{
if (!fragment.HasRegionAttribute())
{
throw new InvalidOperationException("Fragment has no region attribute.");
}
int regionResourceId = fragment.GetRegionId();
if (!_validRegionIds.Contains(regionResourceId))
{
throw new InvalidOperationException("Id specified in resource attribute is invalid.");
}
if (regionResourceId == Resource.Id.PopupRegion)
{
// show popup transparency
var transparency = FindViewById(Resource.Id.PopupTransparency);
transparency.Visibility = ViewStates.Visible;
}
// load fragment into view
var ft = SupportFragmentManager.BeginTransaction();
ft.Replace(regionResourceId, fragment);
if (backStack)
{
// TODO:
// The back button will return to this. However,
// setting this may mess up the custom
// OnBackPressed() behavior
ft.AddToBackStack(null);
}
ft.Commit();
}
private void CloseFragment(MvxFragment fragment)
{
if (fragment.GetRegionId() == Resource.Id.PopupRegion)
{
_transparentPopupView.Visibility = ViewStates.Gone;
}
var ft = SupportFragmentManager.BeginTransaction();
ft.Remove(fragment);
ft.Commit();
}