所有相對定位屬性
- layout_constraintBaseline_toBaselineOf
- layout_constraintTop_toBottomOf
- layout_constraintTop_toTopOf
- layout_constraintBottom_toBottomOf
- layout_constraintBottom_toTopOf
- layout_constraintStart_toEndOf
- layout_constraintStart_toStartOf
- layout_constraintEnd_toEndOf
- layout_constraintEnd_toStartOf
- layout_constraintLeft_toLeftOf
- layout_constraintLeft_toRightOf
- layout_constraintRight_toLeftOf
- layout_constraintRight_toRightOf
MarginMargin的用法和LinearLayout、RelativeLayout的用法相同
- layout_marginStart
- layout_marginEnd
- layout_marginLeft
- layout_marginTop
- layout_marginRight
- layout_marginBottom
而ConstraintLayout還有一些不一樣的Margin
- app:layout_goneMarginBottom
- app:layout_goneMarginEnd
- app:layout_goneMarginLeft
- app:layout_goneMarginRight
- app:layout_goneMarginStart
- app:layout_goneMarginTop
goneMargin是在當被依賴的View被設置為Gone的時候所使用的Margin