Android ListView 每行具有不同的布局

问题描述

我正在尝试确定拥有一个包含每行不同布局的单个 ListView 的最佳方法.我知道如何创建自定义行+自定义数组适配器来支持整个列表视图的自定义行，但是如何在 ListView 中实现许多不同的行样式?

解决方案

既然您知道您将拥有多少种布局类型 - 可以使用这些方法.

getViewTypeCount() - 此方法返回您的列表中有多少行类型的信息

getItemViewType(int position) - 根据位置返回您应该使用哪种布局类型的信息

然后仅当布局为空时才膨胀布局并使用 getItemViewType 确定类型.

查看本教程了解更多信息.>

为了实现您在评论中描述的结构优化，我建议:

• 在名为 ViewHolder 的对象中存储视图.它会提高速度，因为您不必每次在 getView 方法中都调用 findViewById().请参阅 API 演示中的 List14.
• 创建一个通用布局，该布局将符合所有属性组合，并在当前位置没有时隐藏一些元素.

希望能帮到你.如果您可以提供一些包含数据结构的 XML 存根以及您希望如何将其映射到行的信息，我将能够为您提供更准确的建议.按像素.

I am trying to determine the best way to have a single ListView that contains different layouts for each row. I know how to create a custom row + custom array adapter to support a custom row for the entire list view, but how can I implement many different row styles in the ListView?

解决方案

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

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

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

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

Look at this tutorial for further information.

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

• 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.

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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