I position lots of items relative to a layout guide, and would like to position a new item nearly relative to this layout guide.
I tried with a negative layout margin without success.
No, you should not use negative margin .
Open your layout in Android Studio and click the Design tab at the bottom of the editor window. In the Component Tree window, right-click the layout and click Convert layout to ConstraintLayout.
Most of what can be achieved in LinearLayout and RelativeLayout can be done in ConstraintLayout. However, learning the basics of LinearLayout and RelativeLayout is important before trying to understand how to use it with ConstraintLayout.
Constraint Layout simplifies creating complex layouts in Android by making it possible to build most of your UI using only the visual editor in Android Studio. Constraint Layout comes with some powerful tools with the help of which you can define complex layouts without having deep nesting.
Android ContraintLayout Negative Margin (Partially Outside of Parent View) | Lua Software Code This example will put a box at the bottom of the parent view, where 50% of box is outside of / covered by the parent. layout_margin treat negative value as 0 To simulate negative margin, create a invisible view.
This example will put a box at the bottom of the parent view, where 50% of box is outside of / covered by the parent. To simulate negative margin, create a invisible view. Since I want the box to be at the bottom of parent, I apply bottom contraint to the bottom of parent.
A ConstraintLayout is a ViewGroup which allows you to position and size widgets in a flexible way. Note: ConstraintLayout is available as a support library that you can use on Android systems starting with API level 9 (Gingerbread).
Since you did not set where are the right and bottom sides connected, ConstraintLayout cannot know the View’s boundaries. As a result, the match constraint behavior will not work. So when using “0dp”, NEVER EVER forget to set the constraints of the two opposite sides that define the Widget’s boundaries!
android:translationX="-10dp" android:translationY="-10dp"
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