internal static void SetContentView([NotNull] this ViewGroup frameLayout, [NotNull] object content,
[NotNull] FragmentTransaction transaction,
[NotNull] Action <ViewGroup, Fragment, FragmentTransaction> updateAction)
{
Should.NotBeNull(frameLayout, nameof(frameLayout));
var view = content as View;
if (view == null)
{
var fragment = (Fragment)content;
AndroidToolkitExtensions.ValidateViewIdFragment(frameLayout, fragment);
updateAction(frameLayout, fragment, transaction);
}
else
{
if (frameLayout.ChildCount == 1 && frameLayout.GetChildAt(0) == view)
{
return;
}
frameLayout.RemoveAllViews();
frameLayout.AddView(view);
}
}
public bool SetContent(object view, object content)
{
var targetView = view as ViewGroup;
if (targetView == null)
{
return(false);
}
if (content == null)
{
FragmentManager fragmentManager = targetView.GetFragmentManager();
Fragment oldFragment = fragmentManager?.FindFragmentById(targetView.Id);
if (oldFragment != null && !fragmentManager.IsDestroyed)
{
BeginTransaction(fragmentManager, targetView, null)
.Remove(oldFragment)
.CommitAllowingStateLoss();
fragmentManager.ExecutePendingTransactions();
return(true);
}
return(false);
}
var fragment = content as Fragment;
if (fragment == null)
{
return(false);
}
AndroidToolkitExtensions.ValidateViewIdFragment(targetView, fragment);
FragmentManager manager = targetView.GetFragmentManager();
if (manager == null)
{
return(false);
}
FragmentTransaction transaction = BeginTransaction(manager, targetView, fragment);
var addToBackStack = targetView.GetBindingMemberValue(AttachedMembers.ViewGroup.AddToBackStack);
if (addToBackStack && fragment.Arguments != null)
{
addToBackStack = !fragment.Arguments.GetBoolean(AddedToBackStackKey);
}
if (fragment.IsDetached)
{
transaction.Attach(fragment);
}
else
{
if (addToBackStack)
{
if (fragment.Arguments == null)
{
fragment.Arguments = new Bundle();
}
fragment.Arguments.PutBoolean(AddedToBackStackKey, true);
}
transaction.Replace(targetView.Id, fragment);
}
if (addToBackStack)
{
transaction.AddToBackStack(null);
}
transaction.Commit();
manager.ExecutePendingTransactions();
return(true);
}
