internal static IViewModelStore FindOrCreate(FragmentActivity owner)
{
var fm = owner.SupportFragmentManager;
var holder = (ViewModelStoreFragment)fm.FindFragmentByTag(ViewModelStoreFragment.HOLDER_TAG);
if (holder != null)
{
return(holder._store);
}
if (_pendingActivityHolders.TryGetValue(owner, out holder))
{
return(holder._store);
}
if (_activityCleanup == null)
{
_activityCleanup = new CleanPendingActivityHolders();
owner.Application.RegisterActivityLifecycleCallbacks(_activityCleanup);
}
holder = Create(fm);
_pendingActivityHolders.Add(owner, holder);
return(holder._store);
}
public HolderFragmentManager()
{
_mActivityCallbacks = new EmptyActivityLifecycleCallbacks
{
OnActivityDestroyedAction = activity =>
{
if (_mNotCommittedActivityHolders.ContainsKey(activity))
{
_mNotCommittedActivityHolders.Remove(activity);
}
}
};
_mParentDestroyedCallback = new EmptyFragmentLifecycleCallbacks
{
OnFragmentDestroyedAction = (fm, f) =>
{
if (_mNotCommittedFragmentHolders.ContainsKey(f))
{
_mNotCommittedFragmentHolders.Remove(f);
}
}
};
}
