在使用ViewBinding而不是Kotlin合成材料时，如何设置视图ID？

发布于 2025-01-20 16:55:19 字数 1043 浏览 0 评论 0原文

我正在更新一个 Android 项目以使用 ViewBinding 而不是 Kotlin Synthetics。我很难弄清楚如何更改以下代码，以便我可以从布局 ID 访问视图。

binding.myLinearLayout.children
            .filter { it.checkboxInput is CheckBox }

在这种情况下，children 都是通用的 View 类型，无法像以前使用 Kotlin Synthetics 那样访问 checkboxInput ID。

我收到错误未解析的参考：checkboxInput

解决此问题的方法是什么？有没有办法检查视图是否是绑定类型？我需要创建自定义视图类来执行此操作吗？还有其他想法吗？

感谢您的帮助！

编辑

我还有另一个有点令人困惑的案例。

binding.formItems.children
        .filter { it.getTag(R.id.tag_guest_identifier) != null }
        .map { view ->
            Guest(
                guestIdentifier = view.getTag(R.id.tag_guest_identifier).toString(),
                name = view.playerName.valueText.toString(),
                ...
            )
        }
}

在这里，我得到了通用View的列表，因此我无法访问它们的属性（即view.playerName...等）。

我是否需要创建一个 View 子类，然后将视图转换为该类型？有没有更简单的方法来实现这一目标？

再次感谢！

原文

I am updating an Android project to use ViewBinding instead of Kotlin Synthetics. I'm having difficulty figuring out how to change the following code so I can access the views from their layout IDs.

binding.myLinearLayout.children
            .filter { it.checkboxInput is CheckBox }

In this case children are all generic View types and can't access the checkboxInput IDs like it used to be possible using Kotlin Synthetics.

I get the error Unresolved reference: checkboxInput

What would be the way to solve this? Is there a way to check if the View is of a binding type? Do I need to make custom View classes to do this? Any other ideas?

Thanks for your help!

EDIT

I have another case that's a bit confusing.

binding.formItems.children
        .filter { it.getTag(R.id.tag_guest_identifier) != null }
        .map { view ->
            Guest(
                guestIdentifier = view.getTag(R.id.tag_guest_identifier).toString(),
                name = view.playerName.valueText.toString(),
                ...
            )
        }
}

Here, I get a list of generic Views so I can't access their properties (ie. view.playerName... etc.).

Do I need to create a View subclass and then cast the view to that type? Is there an easier way to achieve this?

Thanks again!

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

相守太难 2025-01-27 16:55:19

查看绑定基本上与合成材料相同的方法，除非您拥有具有condbox_input的ID的东西，而不是在活动activechackboxinput contive> activity active 。 /code>或erther，它会在viewBinding对象中创建它。因此，如果您以前这样访问它：

// not declared anywhere, it's just magically there for you to use
checkboxInput

现在，您可以在viewBinding对象上访问它：

binding.checkboxInput

您不需要进行任何搜索，这会破坏观点绑定！它是自动绑定的视图，可与方便对象中的变量进行自动绑定。

您的代码将与过滤器一起使用{是复选框}，然后您将在布局的那部分中获取所有复选框项目（您也可以使用> filterisinstance＆lt; checkbox＆gt;，同一件事）。但是，如果您想要具有特定ID的一个，则必须查看其ID属性 - 到那时，也可能只需使用findViewById！

View binding works basically the same way synthetics did, except when you have something with an ID of checkbox_input, instead of magically creating a variable called checkboxInput on the Activity or whatever, it creates it in the ViewBinding object instead. So if you were accessing it like this before:

// not declared anywhere, it's just magically there for you to use
checkboxInput

now you access it on the ViewBinding object instead:

binding.checkboxInput

You don't need to do any searching, that defeats the point of view binding! It's automagically binding views to variables in a convenient object.

Your code would work with filter { it is CheckBox }, and then you'd get all the Checkbox items within that part of the layout (you can also use filterIsInstance<CheckBox>, same thing). But if you wanted the one with a specific ID, you'd have to look at its ID attribute - and at that point, might as well just use findViewById!

回复收藏 0 原文