简体繁体 English

Android：修改Listview上的项目

[英]Android: modify item on Listview

原文 2014-03-16 15:44:11 9 1 java/ android/ xml/ listview/ fade

I have a ListView . 我有一个ListView 。

I'm using an ArrayAdapter and I'd like to: when the user clicks any item on the list, its LinearLayout (is just a content for x information) fades out and is substituted by other LinearLayout (with y information) which fades in. 我正在使用ArrayAdapter并且我想：当用户单击列表中的任何项目时，其LinearLayout （仅仅是x信息的内容）淡出并被其他LinearLayout （带有y信息）替换为淡入淡出。

However, I do not know how to apply this on my ArrayAdapter . 但是，我不知道如何在我的ArrayAdapter上应用它。 I've searched for a while but I'm not understanding how can I access a single item from the Adapter and make it's children fade out or fade in. 我已经搜索了一段时间，但我不明白如何从Adapter访问单个项目并让它的孩子淡出或淡入。

Any help would be very appreciated. 任何帮助将非常感激。 Thank you very much for your time. 非常感谢您的宝贵时间。

1 个解决方案

In general - adapters do not hold items the role of adapter is to get data model, and to produce item views when ie list view needs them. 通常 - 适配器不保存项，适配器的作用是获取数据模型，并在列表视图需要时生成项视图。

The main concept of replacing item is to replace data inside the adapter and call notifyDataSetChanged(); 替换项的主要概念是替换适配器内的数据并调用notifyDataSetChanged（）; - thats all. - 就这样。

I don't like ArrayAdapter as it's aimed for very simple scenarios. 我不喜欢ArrayAdapter，因为它针对非常简单的场景。 Usually I just create my own Adapter class extending BaseAdapter (just 4 methods to implement). 通常我只是创建自己的Adapter类扩展BaseAdapter（只有4种方法可以实现）。

The transitions of items on ListView are described here: Adding animation to a List View in Android 此处描述了ListView上项目的转换：在Android中向列表视图添加动画