如何将回收器高度设置为 recyclerView 中的最高项目? [英] How to set recycler height to highest item in recyclerView?

问题描述

我需要确保水平 recyclerView 高度与最大项目的高度相同.

I need to make sure that horizontal recyclerView height is the same as the height of the biggest item.

Items 可以有不同的高度(Item = 总是相同的图像 + 标题 + 副标题，标题和副标题可以有无限长).当我为 recyclerView 设置 wrap_content 时，它会根据可见项目的高度调整大小，这会使 recyclerView 下方的内容发生跳跃，这是我想避免的.

Items can have a different height (Item = always the same image + title + subtitle, title and subtitle could have infinite length). When I set wrap_content for my recyclerView it would resize, basing on the height of visible items which makes content below recyclerView jump, and that's something I want to avoid.

我想要达到的目标:灰色区域是可见视口.

What I want to achieve: The gray area is visible viewport.

所以基本上我想以某种方式获得最大项目的高度，然后将 recyclerView 高度设置为该数字.

So basically I would like to get somehow hight of the biggest item, then put recyclerView height to that number.

我已经尝试过基于标题+副标题长度的近似值，但它非常不准确，因为例如，即使两个标题具有相同的文本长度，它们也可能具有不同的宽度，因为我使用的字体不是等宽字体.

What I already tried is approximation high of items based on length of title + subtitle but it's very inaccurate because for example even if two titles have the same text length they could have different width because of font that I use which is not a monospace font.

推荐答案

我也刚遇到这个问题.我的解决方案是:

I just had this issue as well. My solution is:

1. 将 RecyclerView 包裹在 ConstraintLayout 中.
2. 将 ConstraintLayout 的 layout_height 设置为 wrap_content.
3. 向 ConstraintLayout 添加一个项目视图，并使用您希望根据其标题长度达到最高的项目的数据填充它.
4. 将项目视图的可见性设置为不可见.
5. 将 RecyclerView 的 layout_height 设置为零，并使其顶部和底部约束与项目视图的约束相匹配.

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