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Is there any reason why the following layout_marginBottom is not working? However, if I use layout_marginTop on the second view it does work well
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#ade4ad"> <TextView android:id="@+id/first" android:layout_width="90dp" android:layout_height="40dp" app:layout_marginBottom="10dp" android:background="#000"/> <TextView android:id="@+id/second" android:layout_width="90dp" android:layout_height="40dp" android:background="#fff" app:layout_constraintTop_toBottomOf="@+id/first"/> </android.support.constraint.ConstraintLayout> 
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You can't use relative layout directly inside constraint layout. Intention of ConstraintLayout is to optimize and flatten the view hierarchy of your layouts by applying some rules to each view to avoid nesting.
ConstraintLayout provides you the ability to completely design your UI with the drag and drop feature provided by the Android Studio design editor. It helps to improve the UI performance over other layouts. With the help of ConstraintLayout, we can control the group of widgets through a single line of code.
Open the layout file (activity_main. xml) in Android Studio and click the Design tab at the bottom of the editor window. In the Component Tree window, right-click LinearLayout and then choose Convert layout to ConstraintLayout from the context menu.
androidx.constraintlayout.widget.Barrier. Added in 1.1. A Barrier references multiple widgets as input, and creates a virtual guideline based on the most extreme widget on the specified side. For example, a left barrier will align to the left of all the referenced views.
ConstraintLayout is similar to that of other View Groups which we have seen in Android such as RelativeLayout, LinearLayout, and many more. In this article, we will take a look at using ConstraintLayout in Android. This is used to give a unique id to the layout.
In Grid Layout, the UI which is actually seen in the Design editor of Android Studio will be the same as that we will get to see in the app, but in the case of Constraint layout if the UI component is not Constrained then the UI will not look same as that of in design editor.
This is not LinearLayout or RelativeLayout, its ConstraintLayout so you have to give Left, Right, Bottom, Top Constraint to Relevant Layout, in your case You have to give TextView first Bottom_Top Constraint to TextView second. so you can get Margin between Two TextView. Your layout should be like below.
All the power of ConstraintLayout is available directly from the Layout Editor's visual tools, because the layout API and the Layout Editor were specially built for each other. So you can build your layout with ConstraintLayout entirely by drag-and-dropping instead of editing the XML.
In order to
android:layout_marginBottom="20dp" work well, you should use
app:layout_constraintBottom_toBottomOf="parent" If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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