Example #1
0
        protected virtual void SwitchFragment(FragmentManager manager, AView targetView, ShellItem newItem, bool animate = true)
        {
            Profile.FrameBegin();

            Profile.FramePartition("IsDesignerContext");
            if (AndroidContext.IsDesignerContext())
            {
                return;
            }

            Profile.FramePartition("CreateShellItemRenderer");
            var previousRenderer = _currentRenderer;

            _currentRenderer           = CreateShellItemRenderer(newItem);
            _currentRenderer.ShellItem = newItem;
            var fragment = _currentRenderer.Fragment;

            Profile.FramePartition("Transaction");
            FragmentTransaction transaction = manager.BeginTransaction();

            if (animate)
            {
                transaction.SetTransitionEx((int)global::Android.App.FragmentTransit.EnterMask);
            }

            transaction.ReplaceEx(_frameLayout.Id, fragment);
            transaction.CommitAllowingStateLossEx();

            Profile.FramePartition("OnDestroyed");
            void OnDestroyed(object sender, EventArgs args)
            {
                previousRenderer.Destroyed -= OnDestroyed;

                previousRenderer.Dispose();
                previousRenderer = null;
            }

            if (previousRenderer != null)
            {
                previousRenderer.Destroyed += OnDestroyed;
            }

            Profile.FrameEnd();
        }