如何使ConstraintLayout使用百分比值? [英] How to make ConstraintLayout work with percentage values?

问题描述

在Android Studio 2.2的Preview 1中，Google在其支持库中发布了新布局: ConstraintLayout .使用ConstraintLayout可以更轻松地在Android Studio中使用设计工具，但是我没有找到使用相对大小(如LinearLayout中的百分比或权重")的方法.有没有一种方法可以基于百分比定义约束?例如.使一个View占据屏幕的40％，在视图之间创建20％的边距，将一个View的宽度设置为另一个View宽度的50％?

With a Preview 1 of Android Studio 2.2 Google released a new layout in its support library: ConstraintLayout. With ConstraintLayout it is easier to use a Design tool in Android Studio, but I didn't find a way to use relative sizes (percents or 'weights' like in LinearLayout). Is there a way to define the constraints based on percents? E.g. make a View take 40% of a screen, create 20% margin between views, set a View's width to 50% of another View's width?

推荐答案

您目前可以通过两种方法来执行此操作.

You can currently do this in a couple of ways.

一种方法是创建辅助线(右键单击设计区域，然后单击添加垂直/水平辅助线).然后，您可以单击准则的标题"以将排名更改为基于百分比.最后，您可以将视图限制为准则.

One is to create guidelines (right-click the design area, then click add vertical/horizontal guideline). You can then click the guideline's "header" to change the positioning to be percentage based. Finally, you can constrain views to guidelines.

另一种方法是使用偏差(百分比)定位视图，然后将其他视图锚定到该视图.

Another way is to position a view using bias (percentage) and to then anchor other views to that view.

也就是说，我们一直在考虑如何提供基于百分比的尺寸.我无法做出任何承诺，但这是我们要补充的内容.

That said, we have been thinking about how to offer percentage based dimensions. I can't make any promise but it's something we would like to add.

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