Android的列表视图不同的布局每行 [英] Android Listview with different layout for each row

问题描述

我想确定有一个列表视图的最佳方式包含不同的行样式。我知道如何创建一个自定义行+自定义阵列适配器以支持自定义行整个列表视图。但怎么看的ListView支持许多不同的行样式？

I am trying to determine the best way to have a single listview contains different rows styles. I know how to create a custom row + custom array adapter to support a custom row for the entire list view. But how can one listview support many different row styles?

推荐答案

既然你知道你有多少种布局有 - 有可能使用这些方法

Since you know how many types of layout you would have - it's possible to use those methods.

getViewTypeCount（） - 这个方法返回多少种排，你有你的列表信息。

getViewTypeCount() - this methods returns information how many types of rows do you have in your list

getItemViewType（INT位置） - 返回其布局类型，您应该使用基于位置信息

getItemViewType(int position) - returns information which layout type you should use based on position

那你吹大的布局，只有当它是无效，并确定型使用 getItemViewType 。

Then you inflate layout only if it's null and determine type using getItemViewType.

看 本教程 了解更多信息。

Look at this tutorial for further information.

要实现结构优化的一些您在评论所描述我建议：

To achieve some optimizations in structure that you've described in comment I would suggest:

• 在对象存储的看法名为 ViewHolder 。这将提高速度，因为不再需要调用 findViewById（）在 getView 方法每次。请参阅<一href="http://developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/view/List14.html">List14在API演示的。
• 创建一个通用的布局，将符合特性的所有组合和隐藏一些元素，如果当前位置没有了。

• Storing views in object called ViewHolder. It would increase speed because you won't have to call findViewById() every time in getView method. See List14 in API demos.
• Create one generic layout that will conform all combinations of properties and hide some elements if current position doesn't have it.

我希望这会帮助你。如果你能提供一些XML存根与您的数据结构，你想究竟如何将其映射到行的信息，我就可以给你更多的precise提醒。通过像素。

I hope that will help you. If you could provide some XML stub with your data structure and information how exactly you want to map it into row, I would be able to give you more precise advise. By pixel.

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