public override Object InstantiateItem(ViewGroup container, int position)
{
// If we already have this item instantiated, there is nothing
// to do. This can happen when we are restoring the entire pager
// from its saved state, where the fragment manager has already
// taken care of restoring the fragments we previously had instantiated.
if (_fragments.Count > position)
{
var existingFragment = _fragments.ElementAtOrDefault(position);
if (existingFragment != null)
{
return(existingFragment);
}
}
if (_curTransaction == null)
{
_curTransaction = _fragmentManager.BeginTransaction();
}
var fragmentTag = GetTag(position);
Android.Support.V4.App.Fragment.SavedState fss = null;
if (_savedState.Count > position)
{
var savedTag = _savedFragmentTags.ElementAtOrDefault(position);
if (string.Equals(fragmentTag, savedTag))
{
fss = _savedState.ElementAtOrDefault(position);
}
}
var fragment = GetItem(position, fss);
if (fss != null)
{
fragment.SetInitialSavedState(fss);
}
#if DEBUG
Mvx.Trace("Adding item #{0}: f={1} t={2}", position, fragment, fragmentTag);
#endif
while (_fragments.Count <= position)
{
_fragments.Add(null);
}
fragment.SetMenuVisibility(false);
fragment.UserVisibleHint = false;
_fragments[position] = fragment;
_curTransaction.Add(container.Id, fragment, fragmentTag);
return(fragment);
}
public override Android.Support.V4.App.Fragment GetItem(int position, Android.Support.V4.App.Fragment.SavedState fragmentSavedState = null)
{
var fragInfo = Fragments.ElementAt(position);
var fragment = Android.Support.V4.App.Fragment.Instantiate(_context, FragmentJavaName(fragInfo.FragmentType));
var mvxFragment = fragment as MvxFragment;
if (mvxFragment == null)
{
return(fragment);
}
if (mvxFragment.GetType().IsFragmentCacheable(Mvx.Resolve <IMvxAndroidCurrentTopActivity>().Activity.GetType()) && fragmentSavedState != null)
{
return(fragment);
}
var viewModel = fragInfo.ViewModel ?? CreateViewModel(position);
mvxFragment.ViewModel = viewModel;
return(fragment);
}
public abstract Android.Support.V4.App.Fragment GetItem(int position, Android.Support.V4.App.Fragment.SavedState fragmentSavedState = null);
