ConstraintLayout之Infer Constraints(推断约束)

Posted 2023-02-26 Vicent_9920

在使用 ConstraintLayout 的时候，发现一个异常：

This view is not constrained vertically: at runtime it will jump to the left unless you add a vertical constraint less… (Ctrl+F1)
The layout editor allows you to place widgets anywhere on the canvas, and it records the current position with designtime attributes (such as layout_editor_absoluteX.) These attributes are not applied at runtime, so if you push your layout on a device, the widgets may appear in a different location than shown in the editor. To fix this, make sure a widget has both horizontal and vertical constraints by dragging from the edge connections.

我仔细检查了约束条件，都是没有问题的，但是显示我缺少约束条件，编译后会将所有的控件堆在左上角，我选择了无视异常，但是异常没有无视我，编译后的效果类似于FarmeLayout没有添加位置约束一样的效果，后来查找百度，发现了解决方案：

1.切换xml到design试图下
2.选中ConstraintLayout右键选择Constraint Layout中的Infer Constraints

但是我将androidStudio的视图打开以后，仔细检查了，却没有发现上图的提示：

最后我仔细检查了一遍，终于让我找到了：

解决问题！

参考：

http://blog.csdn.net/u010296640/article/details/72922165