ConstraintLayout （約束佈局）屬性詳情

1、app:layout_constraintLeft_toLeftOf //Constrains the left side of a child to the left side of a target child (contains the target child id). 表示此控件的左邊框與某個控件的左邊框對齊或者在其右邊 2、app:layout_constraintLeft_toR

>>阅读原文<<