android - 在 MaterialDrawer Android 的 expandableitem 中更新徽章

Question

我在 expandableItem 中显示徽章。当用户单击该项目时，我希望 expandableItem 中的徽章消失，只在子项目中显示徽章。但是在我的代码中，当我点击时，徽章消失但子项目没有显示。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();

Answer 1

我检查了一下，你是对的，这基本上是底层 FastAdapter 处理可扩展项的方式的结果，如果更新父项，它将折叠子项。这将在 FastAdapter 的 v3 中得到改进，届时请使用以下代码段:

//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));