constraint layout的意思

約束布局

constrainedly───adv.勉強地；強迫地；不自然地

constant battle───不停的戰斗

constant danger───固定火險性

constant dialogue───持續對話

constant flux───恒定磁通

constant pain───持續的疼痛

constant threat───持續的威脅

But more importantly, the label is positioned by passing its layout constraint to the parent.───但更為重要的是，該標簽是通過將其布局約束傳遞給父元素來定位的。

This layout USES a Rectangle constraint to determine where to place the children figures.───該布局使用Rectangle約束來確定在何處放置子圖形。

You need to add only a single constraint and you have a valid layout again.───你只需要再增加一個約束，就又產生一個有效布局。