android - MaterialDrawer Android中expandableitem中的updateBadge

我在expandableItem中显示一个徽章。当用户单击该项目时，我希望expandableItem中的徽章消失，而仅在子项目中显示该徽章。
但是在我的代码中，当我单击时，徽章消失了，但未显示子项。我做错了什么？
谢谢。

result = new DrawerBuilder()
            .withActivity(this)
            .withToolbar(appbar)
            .withHasStableIds(true)
            .withAccountHeader(headerResult)
            .addDrawerItems(
                    ...

                    new ExpandableBadgeDrawerItem().withName("Collapsable Badge").withIcon(R.drawable.ic_menu_exp).withIdentifier(18).withSelectable(false).withBadge("2").withBadgeStyle(new BadgeStyle().withTextColor(Color.WHITE).withColorRes(R.color.md_red_700)).withSubItems(
                            new SecondaryDrawerItem().withName("CollapsableItem").withLevel(2).withIcon(R.drawable.ic_menu_send).withIdentifier(2000).withBadge("2").withBadgeStyle(new BadgeStyle().withTextColor(Color.WHITE).withColorRes(R.color.md_red_700)),
                            new SecondaryDrawerItem().withName("CollapsableItem 2").withLevel(2).withIcon(R.drawable.ic_menu_send).withIdentifier(2001)
                    )
            )
            .withOnDrawerItemClickListener(new Drawer.OnDrawerItemClickListener() {
                @Override
                public boolean onItemClick(View view, int position, IDrawerItem drawerItem) {


                    if (drawerItem != null) {

                        if (drawerItem.getIdentifier() == 18) {
                            result.updateBadge(18, null);
                        }
                    }

                    return false;
                }
            })
            .withSavedInstance(savedInstanceState)
            .build();

最佳答案

我检查了一下，您说对了，这基本上是底层FastAdapter句柄的可扩展项方式的结果，如果父项被更新，它将折叠子项的可扩展项。在FastAdapter的v3中将对此进行改进，然后请使用以下代码段：

//get the item from our drawerItem
ExpandableBadgeDrawerItem d = (ExpandableBadgeDrawerItem) drawerItem;
//remove the badge
d.withBadge((StringHolder) null);
//notify the adapter that the item was changed
result.getAdapter().notifyItemChanged(result.getPosition(18));